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China manufacturer *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer

Product Description

A Series Short Pitch Precision Duplex Roller Chains & Bush Chains

ISO/ANSI/ DIN
Chain No.
Chain No. Pitch

P
mm

Roller diameter

d1max
mm

Width between inner plates
b1min
mm
Pin diameter

d2max
mm

Pin length Inner plate depth
h2max
mm
Plate thickness

Tmax
mm

Transverse                     Pt 
mm
Tensile strength

Qmin
kN/lbf

Average tensile strength
Q0
kN
Weight per meter
q  
kg/m
Lmax
mm
Lcmax
mm
*25-2 *04C-2 6.350 3.30 3.18 2.31 14.5 15.0 6.00 0.80 6.40 7.00/1591 10.0 0.28

*Bush chain: d1 in the table indicates the external diameter of the bush

ROLLER CHAIN

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.

CONSTRUCTION OF THE CHAIN

Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CHINAMFG which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

LUBRICATION

Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CHINAMFG paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

VARIANTS DESIGN

Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

USE

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CHINAMFG the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CHINAMFG flight, a system known as Thrust vectoring.

WEAR

 

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

CHAIN STHangZhouRDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Size Pitch Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load
25 0.250 in (6.35 mm) 0.130 in (3.30 mm) 780 lb (350 kg) 18 lb (8.2 kg)
35 0.375 in (9.53 mm) 0.200 in (5.08 mm) 1,760 lb (800 kg) 18 lb (8.2 kg)
41 0.500 in (12.70 mm) 0.306 in (7.77 mm) 1,500 lb (680 kg) 18 lb (8.2 kg)
40 0.500 in (12.70 mm) 0.312 in (7.92 mm) 3,125 lb (1,417 kg) 31 lb (14 kg)
50 0.625 in (15.88 mm) 0.400 in (10.16 mm) 4,880 lb (2,210 kg) 49 lb (22 kg)
60 0.750 in (19.05 mm) 0.469 in (11.91 mm) 7,030 lb (3,190 kg) 70 lb (32 kg)
80 1.000 in (25.40 mm) 0.625 in (15.88 mm) 12,500 lb (5,700 kg) 125 lb (57 kg)
100 1.250 in (31.75 mm) 0.750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 1.500 in (38.10 mm) 0.875 in (22.23 mm) 28,125 lb (12,757 kg) 281 lb (127 kg)
140 1.750 in (44.45 mm) 1.000 in (25.40 mm) 38,280 lb (17,360 kg) 383 lb (174 kg)
160 2.000 in (50.80 mm) 1.125 in (28.58 mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
180 2.250 in (57.15 mm) 1.460 in (37.08 mm) 63,280 lb (28,700 kg) 633 lb (287 kg)
200 2.500 in (63.50 mm) 1.562 in (39.67 mm) 78,175 lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (76.20 mm) 1.875 in (47.63 mm) 112,500 lb (51,000 kg) 1,000 lb (450 kg

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Pitch (inches) Pitch expressed
in eighths
ANSI standard
chain number
Width (inches)
14 28 25 18
38 38 35 316
12 48 41 14
12 48 40 516
58 58 50 38
34 68 60 12
1 88 80 58

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An “H” following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, “10 speed chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, where 1/8″ refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at 1 and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.

 

WHY CHOOSE US 

1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed CHINAMFG Marketing Network
7. Efficient After-Sale Service System

 

The 219 sets of advanced automatic production equipment provide guarantees for high product quality. The 167 engineers and technicians with senior professional titles can design and develop products to meet the exact demands of customers, and OEM customizations are also available with us. Our sound global service network can provide customers with timely after-sales technical services.

We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve CHINAMFG range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.

 

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car
Surface Treatment: Polishing
Structure: Roller Chain
Material: Alloy
Type: Bush Chain
Samples:
US$ 6/Meter
1 Meter(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

duplex chain

Can duplex chains be used in overhead or inverted applications?

Duplex chains can be used in overhead or inverted applications, depending on the specific design and requirements of the application. The suitability of duplex chains for these types of applications depends on factors such as the load, speed, environmental conditions, and proper installation.

In overhead applications, where the chain is mounted above the equipment or system, duplex chains can be used to transmit power or carry loads. The chain is typically supported by trolleys or guides to ensure smooth movement along the overhead track. Proper lubrication and periodic maintenance are important to ensure optimal performance and prevent premature wear or failure.

In inverted applications, where the chain is mounted underneath the equipment or system, duplex chains can also be employed. These chains are designed to handle the tension and bending forces associated with being inverted. They are typically installed with appropriate guides and tensioners to ensure proper alignment and tensioning of the chain. Lubrication and maintenance are equally important in inverted applications to ensure smooth operation and extend the chain’s service life.

When using duplex chains in overhead or inverted applications, it is crucial to consider the specific load requirements, speed limitations, and environmental conditions such as temperature, humidity, and potential contaminants. Additionally, proper chain selection, installation, and regular inspections are essential to ensure safe and reliable operation.

duplex chain

How do duplex chains perform in extreme temperature conditions?

Duplex chains are designed to operate efficiently and reliably in a wide range of temperature conditions. However, extreme temperatures can have an impact on the performance of duplex chains. Here’s a closer look at how duplex chains perform in different temperature conditions:

  • High-temperature environments: In high-temperature environments, the performance of duplex chains can be affected by factors such as thermal expansion, increased wear, and reduced lubricant effectiveness. It is essential to select duplex chains made from heat-resistant materials and use appropriate lubricants with high-temperature stability to ensure reliable operation.
  • Low-temperature environments: In low-temperature environments, the material properties of duplex chains can be affected, leading to increased brittleness and reduced flexibility. This can impact the chain’s ability to flex and transmit power effectively. It is important to choose duplex chains made from materials suitable for low temperatures and ensure proper lubrication to prevent freezing or stiffening of the chain.

When operating duplex chains in extreme temperature conditions, it is crucial to consider the following:

  • Chain material selection: Choosing the right material for the duplex chain is critical to ensure its performance in extreme temperatures. Heat-resistant alloys or special coatings may be required for high-temperature applications, while low-temperature materials should be selected for cold environments.
  • Lubrication: Proper lubrication is essential in extreme temperature conditions to reduce friction and prevent excessive wear. It is important to select lubricants that can withstand the operating temperature range and maintain their effectiveness.
  • Maintenance and inspection: Regular maintenance and inspection of duplex chains operating in extreme temperature conditions are vital. This includes monitoring chain wear, checking for signs of thermal degradation, and replacing worn or damaged components promptly.

By considering the specific temperature requirements and selecting appropriate materials, lubricants, and maintenance practices, duplex chains can perform reliably in extreme temperature conditions. It is recommended to consult with chain manufacturers or industry experts for guidance on selecting and using duplex chains in such applications.

duplex chain

How do you determine the appropriate size and pitch of a duplex chain?

Determining the appropriate size and pitch of a duplex chain involves considering several factors to ensure optimal performance and compatibility with the application. Here’s a step-by-step guide to determining the right size and pitch:

  1. Identify the power requirements: Determine the power requirements of the application, including the torque and speed at which the chain will operate. This information is crucial for selecting a chain that can handle the expected load and provide the necessary power transmission.
  2. Calculate the design power: Use the torque and speed requirements to calculate the design power, which is the amount of power the chain needs to transmit. Design power is calculated using the formula: Design Power (kW) = Torque (Nm) x Speed (rpm) / 1000.
  3. Refer to manufacturer’s catalogs: Consult manufacturer catalogs or technical specifications to find the appropriate duplex chain series that can handle the design power calculated in the previous step. The catalogs provide detailed information on the capacity and capabilities of different chain sizes and pitches.
  4. Consider the chain’s tensile strength: Evaluate the tensile strength of the duplex chain options available in the selected series. The tensile strength should be sufficient to handle the anticipated load without exceeding the chain’s maximum working load limit.
  5. Determine the pitch: The pitch refers to the distance between the centers of adjacent chain pins and is an essential parameter to ensure proper meshing with the sprockets. The pitch size should match the pitch diameter of the sprockets used in the system. Select the duplex chain with the appropriate pitch size that matches the sprocket pitch diameter.
  6. Consider environmental factors: Take into account any specific environmental factors that may affect the chain’s performance, such as temperature extremes, corrosion, or abrasive conditions. Choose a duplex chain with the appropriate material and surface treatment to withstand the environmental conditions.
  7. Verify compatibility: Double-check the compatibility of the selected duplex chain with the sprockets, shafts, and other components in the power transmission system. Ensure that the chain can properly engage with the sprockets and align with the overall system design.
  8. Consult with experts: If you are unsure or require assistance in determining the appropriate size and pitch of a duplex chain, consult with experienced engineers, chain manufacturers, or industry experts who can provide guidance based on their expertise.

By following these steps and considering the power requirements, tensile strength, pitch, and environmental factors, you can determine the appropriate size and pitch of a duplex chain that will effectively and reliably transmit power in your specific application.

China manufacturer *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer  China manufacturer *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer
editor by CX 2023-11-29

China Standard 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains

Product Description

Model NO. 06C/08A/10A/12A/16A/20A/24A/28A/32A/40A/06B/08B/10B/12B/16B/20B/24B/28B/32B/40B-1/2/3
Heavy duty
Chain Model Roller Chains
Structure (for Chain) Roller Chain
Specification GB/T, DIN, ANSI, ISO, BS, JIS.
Origin HangZhou, ZheJiang
Color Solid Color
Chain Color Customized

Our company

Wolff Chain Co. is 1 of the professional chain manufacturers in China. We focus on reseaching, manufacturing and trading of the chain drive with famous brands — “DOVON” and “DECHO”. We supply OEM services for many famous enterprises such as SUZUKI, XIHU (WEST LAKE) DIS., FAW, AGCO, JUMING as well. 

Wolff mainly producing the Transmission chains,Conveyor chains,Dragging Chains,Silent chains,Leaf chains,Roller chains,Special chain and many other series of chain products. Our technicians a have improved the chains quality to the world-level. High quality material selection, powerful and precise heat-treatment technology and excellent assembly methods ensure Wolff chains meet the tough and strict requirements for machines and vehicles. 

All of our products completely conform to the international standard such as ISO\DIN\ANSI\BS\JIS, etc. Wolff has been successfully certified by ISO9001 Quality Management System,SGS inspection and BV inspection. Wolff chains can be widely applied to many industries including automobile, motorcycle, forklift, wood processing machine, constructure machine, packing machine, food machine,tobacco machine and agricultural equipments. Wolff chains are popular in America,South America,Europe,Middle East, South East Asia and Africa markets.

Our workshop

Our certification

Welcome to our exhibition

FAQ

Q1. What is your terms of packing?
A: Generally, we pack our goods in single color box. If you have special request about packing, pls negotiate with us in advance, we can pack the goods as your request.

Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages 
before you pay the balance. Other payments terms, pls negotiate with us in advance, we can discuss.

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.

Q4. How about your delivery time?
A: Generally, it will take 25 to 30 days after receiving your advance payment. The specific delivery time depends 
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and 
the courier cost.We welcome sample order.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, 
no matter where they come from.

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Food Machinery, Marine, Mining Equipment
Surface Treatment: Oil Blooming
Structure: Roller Chain
Material: Carbon Steel
Type: Short Pitch Chain
Samples:
US$ 0/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

duplex chain

What are the limitations of using duplex chains in certain applications?

While duplex chains offer many advantages, there are certain limitations to consider when using them in certain applications. Here are some key limitations:

  • Space Constraints: Duplex chains have a wider profile compared to other chain types, which can be a limitation in applications with limited space. It’s important to ensure that there is sufficient space to accommodate the duplex chain and its associated components.
  • Complex Installation: Installing and properly tensioning duplex chains can be more complex compared to simpler chain designs. It may require specific tools and expertise to ensure proper installation and tensioning, which can increase the overall installation time and complexity.
  • Higher Weight: Due to their design and construction, duplex chains can be heavier compared to other chain types. This additional weight may not be suitable for applications where weight reduction is a critical factor.
  • Increased Friction: Duplex chains can generate higher friction compared to some other chain types. This can lead to increased power loss and reduced overall efficiency in certain applications.
  • Maintenance Requirements: Duplex chains require regular maintenance, including lubrication and periodic inspection, to ensure optimal performance and longevity. Neglecting proper maintenance can lead to increased wear and reduced service life.
  • Cost: Duplex chains can be more expensive compared to standard chains or other power transmission options. The cost of purchasing and maintaining duplex chains should be considered in relation to the specific application requirements and budget.

It’s important to carefully evaluate the specific needs and constraints of the application when considering the use of duplex chains. Alternative chain types or power transmission solutions may be more suitable in certain situations. Consulting with experts or chain manufacturers can provide valuable guidance in selecting the most appropriate chain type for a given application.

duplex chain

Are there any environmental considerations when using duplex chains?

Yes, there are several environmental considerations to keep in mind when using duplex chains in various applications. Here are some key factors to consider:

  • Corrosive environments: If the application involves exposure to corrosive substances or environments, it is crucial to select duplex chains made from corrosion-resistant materials. Stainless steel or coated chains are commonly used in such conditions to prevent rust and degradation.
  • Chemical exposure: In applications where duplex chains may come into contact with chemicals, it is essential to choose materials that are resistant to the specific chemicals involved. Compatibility charts or consultation with chain manufacturers can help determine the suitable material for chemical resistance.
  • Dusty or dirty environments: Operating duplex chains in dusty or dirty environments can lead to the accumulation of debris, which can affect chain performance. Regular cleaning and proper lubrication are necessary to prevent abrasive particles from causing wear and reducing chain life.
  • Humidity and moisture: High humidity or moist conditions can contribute to chain corrosion and accelerated wear. In such environments, it is crucial to use appropriate lubrication and consider protective measures such as sealing or shielding to minimize moisture ingress.
  • Environmental regulations: Depending on the industry and application, there may be specific environmental regulations or standards to comply with. It is important to ensure that the use of duplex chains aligns with applicable regulations and meets environmental requirements.

By considering these environmental factors and selecting duplex chains with suitable materials and coatings, as well as implementing proper maintenance practices, the performance and longevity of the chains can be optimized while minimizing the impact on the environment. It is recommended to consult with chain manufacturers or industry experts for specific guidance on environmental considerations related to duplex chain usage.

duplex chain

What is a duplex chain and how does it differ from other types of chains?

A duplex chain is a type of roller chain that consists of two parallel strands of interconnected links. It is commonly used in applications that require higher strength and durability compared to standard single-strand chains. Here’s a detailed explanation of duplex chains and their key differences from other types of chains:

A duplex chain features two sets of outer plates, inner plates, rollers, and pins, which are connected together to form the two parallel strands. The strands are typically offset from each other by half a pitch, creating a symmetrical design. The inner plates have a slightly wider profile to accommodate the double strands.

The main differences between duplex chains and other types of chains, such as single-strand chains, include:

1. Load capacity: Duplex chains offer higher load-carrying capacity compared to single-strand chains. The use of two parallel strands increases the contact area with the sprockets, distributing the load more evenly and reducing stress on individual components.

2. Tensile strength: Duplex chains have greater tensile strength due to the double strand configuration. The additional set of links and plates enhances the chain’s overall strength, making it suitable for heavy-duty applications that require withstanding high loads and shocks.

3. Increased durability: The use of double strands in a duplex chain improves its durability and resistance to wear. The load distribution across the two strands helps to minimize wear on individual components, extending the chain’s service life.

4. Higher precision: Duplex chains typically offer better precision and alignment than single-strand chains. The symmetrical design and double strands contribute to improved positioning accuracy, making duplex chains suitable for applications that require precise motion control.

5. Compatibility: Duplex chains are compatible with the same types of sprockets as single-strand chains. They can be used in a wide range of applications where the transmission of power and motion is required.

In summary, duplex chains provide increased load capacity, higher tensile strength, enhanced durability, improved precision, and compatibility with standard sprockets. These features make duplex chains a preferred choice for demanding applications that require robust power transmission and reliable performance.

China Standard 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains  China Standard 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains
editor by CX 2023-09-11

China supplier *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer

Product Description

A Series Short Pitch Precision Duplex Roller Chains & Bush Chains

ISO/ANSI/ DIN
Chain No.
Chain No. Pitch

P
mm

Roller diameter

d1max
mm

Width between inner plates
b1min
mm
Pin diameter

d2max
mm

Pin length Inner plate depth
h2max
mm
Plate thickness

Tmax
mm

Transverse                     Pt 
mm
Tensile strength

Qmin
kN/lbf

Average tensile strength
Q0
kN
Weight per meter
q  
kg/m
Lmax
mm
Lcmax
mm
*25-2 *04C-2 6.350 3.30 3.18 2.31 14.5 15.0 6.00 0.80 6.40 7.00/1591 10.0 0.28

*Bush chain: d1 in the table indicates the external diameter of the bush

ROLLER CHAIN

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.

CONSTRUCTION OF THE CHAIN

Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CZPT which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

LUBRICATION

Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CZPT paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

VARIANTS DESIGN

Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

USE

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CZPT the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CZPT flight, a system known as Thrust vectoring.

WEAR

 

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

CHAIN STHangZhouRDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Size Pitch Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load
25 0.250 in (6.35 mm) 0.130 in (3.30 mm) 780 lb (350 kg) 18 lb (8.2 kg)
35 0.375 in (9.53 mm) 0.200 in (5.08 mm) 1,760 lb (800 kg) 18 lb (8.2 kg)
41 0.500 in (12.70 mm) 0.306 in (7.77 mm) 1,500 lb (680 kg) 18 lb (8.2 kg)
40 0.500 in (12.70 mm) 0.312 in (7.92 mm) 3,125 lb (1,417 kg) 31 lb (14 kg)
50 0.625 in (15.88 mm) 0.400 in (10.16 mm) 4,880 lb (2,210 kg) 49 lb (22 kg)
60 0.750 in (19.05 mm) 0.469 in (11.91 mm) 7,030 lb (3,190 kg) 70 lb (32 kg)
80 1.000 in (25.40 mm) 0.625 in (15.88 mm) 12,500 lb (5,700 kg) 125 lb (57 kg)
100 1.250 in (31.75 mm) 0.750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 1.500 in (38.10 mm) 0.875 in (22.23 mm) 28,125 lb (12,757 kg) 281 lb (127 kg)
140 1.750 in (44.45 mm) 1.000 in (25.40 mm) 38,280 lb (17,360 kg) 383 lb (174 kg)
160 2.000 in (50.80 mm) 1.125 in (28.58 mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
180 2.250 in (57.15 mm) 1.460 in (37.08 mm) 63,280 lb (28,700 kg) 633 lb (287 kg)
200 2.500 in (63.50 mm) 1.562 in (39.67 mm) 78,175 lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (76.20 mm) 1.875 in (47.63 mm) 112,500 lb (51,000 kg) 1,000 lb (450 kg

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Pitch (inches) Pitch expressed
in eighths
ANSI standard
chain number
Width (inches)
14 28 25 18
38 38 35 316
12 48 41 14
12 48 40 516
58 58 50 38
34 68 60 12
1 88 80 58

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An “H” following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, “10 speed chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, where 1/8″ refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at 1 and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.

 

WHY CHOOSE US 

1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed CZPT Marketing Network
7. Efficient After-Sale Service System

 

The 219 sets of advanced automatic production equipment provide guarantees for high product quality. The 167 engineers and technicians with senior professional titles can design and develop products to meet the exact demands of customers, and OEM customizations are also available with us. Our sound global service network can provide customers with timely after-sales technical services.

We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve CZPT range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.

 

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car
Surface Treatment: Polishing
Structure: Roller Chain
Material: Alloy
Type: Bush Chain
Samples:
US$ 6/Meter
1 Meter(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

duplex chain

Can duplex chains be used for power transmission in automotive applications?

Yes, duplex chains can be used for power transmission in automotive applications. They offer several advantages that make them suitable for automotive use. Here are some key points to consider:

  • High Strength: Duplex chains are designed to withstand high loads and provide reliable power transmission in demanding automotive applications. They are constructed using high-strength materials, such as alloy steel, which ensures durability and longevity.
  • Efficiency: Duplex chains have high mechanical efficiency, allowing for efficient power transfer in automotive systems. Their design minimizes frictional losses, enabling smooth and reliable power transmission.
  • Compact Design: Duplex chains have a compact design, which is beneficial in automotive applications where space is limited. They can be easily integrated into the drivetrain system without requiring excessive space.
  • Resistance to Wear: Duplex chains are designed to resist wear and withstand harsh operating conditions. They are capable of handling the dynamic and demanding nature of automotive applications, ensuring long-lasting performance.
  • Cost-Effectiveness: Duplex chains are a cost-effective solution for power transmission in automotive applications. They offer a balance between performance and affordability, making them a popular choice in the automotive industry.

However, it’s important to note that duplex chains may not be suitable for all automotive applications. Factors such as specific power requirements, operating conditions, and space constraints should be taken into consideration when selecting the appropriate chain type. Consulting with chain manufacturers or engineers familiar with automotive applications can provide valuable insights and ensure the best choice for power transmission in automotive systems.

duplex chain

How do duplex chains handle misalignment between sprockets?

Duplex chains are designed to handle a certain degree of misalignment between sprockets. However, excessive misalignment can lead to premature wear and reduced chain life. Here are some key points to understand:

  • Duplex chains can tolerate small misalignments between sprockets due to their flexible construction. The side plates and link connections allow for some angular and axial movement.
  • Minor misalignments can be accommodated through the natural flexing and articulation of the chain as it engages with the sprockets. This flexibility helps the chain to adjust and maintain proper engagement with the sprocket teeth.
  • However, it is important to note that excessive misalignment should be avoided. Excessive misalignment can cause the chain to experience increased wear, uneven load distribution, and increased stress on the chain components.
  • To minimize misalignment-related issues, it is recommended to ensure proper alignment of the sprockets during installation. This includes aligning the sprockets parallel to each other and ensuring the correct center-to-center distance.
  • Regular inspection and maintenance of the chain drive system are also essential to identify any misalignment issues early on and take corrective measures.
  • In cases where significant misalignment is unavoidable, special chain types or guides can be considered to mitigate the effects of misalignment and improve the chain’s performance and longevity.

Overall, while duplex chains can tolerate some misalignment, it is important to strive for proper sprocket alignment during installation and regular maintenance to optimize the chain’s performance and lifespan.

duplex chain

What is a duplex chain and how does it differ from other types of chains?

A duplex chain is a type of roller chain that consists of two parallel strands of interconnected links. It is commonly used in applications that require higher strength and durability compared to standard single-strand chains. Here’s a detailed explanation of duplex chains and their key differences from other types of chains:

A duplex chain features two sets of outer plates, inner plates, rollers, and pins, which are connected together to form the two parallel strands. The strands are typically offset from each other by half a pitch, creating a symmetrical design. The inner plates have a slightly wider profile to accommodate the double strands.

The main differences between duplex chains and other types of chains, such as single-strand chains, include:

1. Load capacity: Duplex chains offer higher load-carrying capacity compared to single-strand chains. The use of two parallel strands increases the contact area with the sprockets, distributing the load more evenly and reducing stress on individual components.

2. Tensile strength: Duplex chains have greater tensile strength due to the double strand configuration. The additional set of links and plates enhances the chain’s overall strength, making it suitable for heavy-duty applications that require withstanding high loads and shocks.

3. Increased durability: The use of double strands in a duplex chain improves its durability and resistance to wear. The load distribution across the two strands helps to minimize wear on individual components, extending the chain’s service life.

4. Higher precision: Duplex chains typically offer better precision and alignment than single-strand chains. The symmetrical design and double strands contribute to improved positioning accuracy, making duplex chains suitable for applications that require precise motion control.

5. Compatibility: Duplex chains are compatible with the same types of sprockets as single-strand chains. They can be used in a wide range of applications where the transmission of power and motion is required.

In summary, duplex chains provide increased load capacity, higher tensile strength, enhanced durability, improved precision, and compatibility with standard sprockets. These features make duplex chains a preferred choice for demanding applications that require robust power transmission and reliable performance.

China supplier *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer  China supplier *04c-2 a Series Short Pitch Precision Duplex Stainless Steel Conveyor Forged Roller Chains and Bush Chains for Engineer
editor by CX 2023-08-08

China Best Sales 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains

Product Description

Model NO. 06C/08A/10A/12A/16A/20A/24A/28A/32A/40A/06B/08B/10B/12B/16B/20B/24B/28B/32B/40B-1/2/3
Heavy duty
Chain Model Roller Chains
Structure (for Chain) Roller Chain
Specification GB/T, DIN, ANSI, ISO, BS, JIS.
Origin HangZhou, ZheJiang
Color Solid Color
Chain Color Customized

Our company

Wolff Chain Co. is 1 of the professional chain manufacturers in China. We focus on reseaching, manufacturing and trading of the chain drive with famous brands — “DOVON” and “DECHO”. We supply OEM services for many famous enterprises such as SUZUKI, XIHU (WEST LAKE) DIS., FAW, AGCO, JUMING as well. 

Wolff mainly producing the Transmission chains,Conveyor chains,Dragging Chains,Silent chains,Leaf chains,Roller chains,Special chain and many other series of chain products. Our technicians a have improved the chains quality to the world-level. High quality material selection, powerful and precise heat-treatment technology and excellent assembly methods ensure Wolff chains meet the tough and strict requirements for machines and vehicles. 

All of our products completely conform to the international standard such as ISO\DIN\ANSI\BS\JIS, etc. Wolff has been successfully certified by ISO9001 Quality Management System,SGS inspection and BV inspection. Wolff chains can be widely applied to many industries including automobile, motorcycle, forklift, wood processing machine, constructure machine, packing machine, food machine,tobacco machine and agricultural equipments. Wolff chains are popular in America,South America,Europe,Middle East, South East Asia and Africa markets.

Our workshop

Our certification

Welcome to our exhibition

FAQ

Q1. What is your terms of packing?
A: Generally, we pack our goods in single color box. If you have special request about packing, pls negotiate with us in advance, we can pack the goods as your request.

Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We’ll show you the photos of the products and packages 
before you pay the balance. Other payments terms, pls negotiate with us in advance, we can discuss.

Q3. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.

Q4. How about your delivery time?
A: Generally, it will take 25 to 30 days after receiving your advance payment. The specific delivery time depends 
on the items and the quantity of your order.

Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and 
the courier cost.We welcome sample order.

Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery

Q8: How do you make our business long-term and good relationship?
1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, 
no matter where they come from.

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Food Machinery, Marine, Mining Equipment
Surface Treatment: Oil Blooming
Structure: Roller Chain
Material: Carbon Steel
Type: Short Pitch Chain
Samples:
US$ 0/Piece
1 Piece(Min.Order)

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Request Sample

Customization:
Available

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Customized Request

duplex chain

What are the maintenance intervals for duplex chains?

Maintenance intervals for duplex chains can vary depending on factors such as the operating conditions, load, and environmental factors. Here are some general guidelines to consider:

  • Lubrication: Regular lubrication is essential to reduce friction and wear in duplex chains. The lubrication interval will depend on the chain speed, operating temperature, and the type of lubricant used. It is recommended to follow the manufacturer’s guidelines for lubrication frequency and use a high-quality lubricant suitable for the application.
  • Tensioning: Proper chain tension is important for efficient power transmission and to prevent excessive wear. It is recommended to check and adjust the chain tension periodically. The frequency of tensioning will depend on the specific application and the chain’s elongation characteristics.
  • Inspection: Regular visual inspections of the duplex chain are necessary to identify any signs of wear, damage, or misalignment. Inspections should include checking for elongation, corrosion, loose pins, damaged rollers, and worn sprocket teeth. The frequency of inspections will depend on the operating conditions and the criticality of the equipment.
  • Cleaning: In environments where contaminants such as dirt, dust, or debris are present, regular cleaning of the duplex chain may be required. This helps to maintain proper functioning and prevent accelerated wear.
  • Replacement: Duplex chains should be replaced when they have reached their wear limits or when significant damage or elongation is detected. It is important to monitor the chain’s condition and replace it promptly to prevent unexpected failures and equipment downtime.

It is recommended to consult the manufacturer’s documentation or seek guidance from chain experts to determine the specific maintenance intervals for duplex chains based on the application requirements and operating conditions. They can provide more detailed information and specific recommendations for your particular application.

duplex chain

How do duplex chains handle misalignment between sprockets?

Duplex chains are designed to handle a certain degree of misalignment between sprockets. However, excessive misalignment can lead to premature wear and reduced chain life. Here are some key points to understand:

  • Duplex chains can tolerate small misalignments between sprockets due to their flexible construction. The side plates and link connections allow for some angular and axial movement.
  • Minor misalignments can be accommodated through the natural flexing and articulation of the chain as it engages with the sprockets. This flexibility helps the chain to adjust and maintain proper engagement with the sprocket teeth.
  • However, it is important to note that excessive misalignment should be avoided. Excessive misalignment can cause the chain to experience increased wear, uneven load distribution, and increased stress on the chain components.
  • To minimize misalignment-related issues, it is recommended to ensure proper alignment of the sprockets during installation. This includes aligning the sprockets parallel to each other and ensuring the correct center-to-center distance.
  • Regular inspection and maintenance of the chain drive system are also essential to identify any misalignment issues early on and take corrective measures.
  • In cases where significant misalignment is unavoidable, special chain types or guides can be considered to mitigate the effects of misalignment and improve the chain’s performance and longevity.

Overall, while duplex chains can tolerate some misalignment, it is important to strive for proper sprocket alignment during installation and regular maintenance to optimize the chain’s performance and lifespan.

duplex chain

How do you determine the appropriate size and pitch of a duplex chain?

Determining the appropriate size and pitch of a duplex chain involves considering several factors to ensure optimal performance and compatibility with the application. Here’s a step-by-step guide to determining the right size and pitch:

  1. Identify the power requirements: Determine the power requirements of the application, including the torque and speed at which the chain will operate. This information is crucial for selecting a chain that can handle the expected load and provide the necessary power transmission.
  2. Calculate the design power: Use the torque and speed requirements to calculate the design power, which is the amount of power the chain needs to transmit. Design power is calculated using the formula: Design Power (kW) = Torque (Nm) x Speed (rpm) / 1000.
  3. Refer to manufacturer’s catalogs: Consult manufacturer catalogs or technical specifications to find the appropriate duplex chain series that can handle the design power calculated in the previous step. The catalogs provide detailed information on the capacity and capabilities of different chain sizes and pitches.
  4. Consider the chain’s tensile strength: Evaluate the tensile strength of the duplex chain options available in the selected series. The tensile strength should be sufficient to handle the anticipated load without exceeding the chain’s maximum working load limit.
  5. Determine the pitch: The pitch refers to the distance between the centers of adjacent chain pins and is an essential parameter to ensure proper meshing with the sprockets. The pitch size should match the pitch diameter of the sprockets used in the system. Select the duplex chain with the appropriate pitch size that matches the sprocket pitch diameter.
  6. Consider environmental factors: Take into account any specific environmental factors that may affect the chain’s performance, such as temperature extremes, corrosion, or abrasive conditions. Choose a duplex chain with the appropriate material and surface treatment to withstand the environmental conditions.
  7. Verify compatibility: Double-check the compatibility of the selected duplex chain with the sprockets, shafts, and other components in the power transmission system. Ensure that the chain can properly engage with the sprockets and align with the overall system design.
  8. Consult with experts: If you are unsure or require assistance in determining the appropriate size and pitch of a duplex chain, consult with experienced engineers, chain manufacturers, or industry experts who can provide guidance based on their expertise.

By following these steps and considering the power requirements, tensile strength, pitch, and environmental factors, you can determine the appropriate size and pitch of a duplex chain that will effectively and reliably transmit power in your specific application.

China Best Sales 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains  China Best Sales 16A-2 a Series Short Pitch Precision Duplex Industrial Engineering Roller Chains and Bush Chains
editor by CX 2023-07-20

China Standard Gearbox Belt Transmission Parts Engineering and Construction Machinery 50-2 a Series Short Pitch Precision Duplex Roller Chains and Bush Chains

Product Description

A Series Short Pitch Precision Duplex Roller Chains & Bush Chains

ISO/ANSI/ DIN
Chain No.
Chain No. Pitch

P
mm

Roller diameter

d1max
mm

Width between inner plates
b1min
mm
Pin diameter

d2max
mm

Pin length Inner plate depth
h2max
mm
Plate thickness

Tmax
mm

Transverse                     Pt 
mm
Tensile strength

Qmin
kN/lbf

Average tensile strength
Q0
kN
Weight per meter
q  
kg/m
Lmax
mm
Lcmax
mm
50-2 10A-2 15.875 10.16 9.40 5.08 38.9 40.4 15.09 2.03 18.11 44.40/10091 62.6 2.00

*Bush chain: d1 in the table indicates the external diameter of the bush

ROLLER CHAIN

Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. It consists of a series of short cylindrical rollers held together by side links. It is driven by a toothed wheel called a sprocket. It is a simple, reliable, and efficient means of power transmission.

CONSTRUCTION OF THE CHAIN

Two different sizes of roller chain, showing construction.
There are 2 types of links alternating in the bush roller chain. The first type is inner links, having 2 inner plates held together by 2 sleeves or bushings CZPT which rotate 2 rollers. Inner links alternate with the second type, the outer links, consisting of 2 outer plates held together by pins passing through the bushings of the inner links. The “bushingless” roller chain is similar in operation though not in construction; instead of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the hole which serves the same purpose. This has the advantage of removing 1 step in assembly of the chain.

The roller chain design reduces friction compared to simpler designs, resulting in higher efficiency and less wear. The original power transmission chain varieties lacked rollers and bushings, with both the inner and outer plates held by pins which directly contacted the sprocket teeth; however this configuration exhibited extremely rapid wear of both the sprocket teeth, and the plates where they pivoted on the pins. This problem was partially solved by the development of bushed chains, with the pins holding the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the wear over a greater area; however the teeth of the sprockets still wore more rapidly than is desirable, from the sliding friction against the bushings. The addition of rollers surrounding the bushing sleeves of the chain and provided rolling contact with the teeth of the sprockets resulting in excellent resistance to wear of both sprockets and chain as well. There is even very low friction, as long as the chain is sufficiently lubricated. Continuous, clean, lubrication of roller chains is of primary importance for efficient operation as well as correct tensioning.

LUBRICATION

Many driving chains (for example, in factory equipment, or driving a camshaft inside an internal combustion engine) operate in clean environments, and thus the wearing surfaces (that is, the pins and bushings) are safe from precipitation and airborne grit, many even in a sealed environment such as an oil bath. Some roller chains are designed to have o-rings built into the space between the outside link plate and the inside roller link plates. Chain manufacturers began to include this feature in 1971 after the application was invented by Joseph Montano while working for Whitney Chain of Hartford, Connecticut. O-rings were included as a way to improve lubrication to the links of power transmission chains, a service that is vitally important to extending their working life. These rubber fixtures form a barrier that holds factory applied lubricating grease inside the pin and bushing wear areas. Further, the rubber o-rings prevent dirt and other contaminants from entering inside the chain linkages, where such particles would otherwise cause significant wear.[citation needed]

There are also many chains that have to operate in dirty conditions, and for size or operational reasons cannot be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will necessarily have relatively high rates of wear, particularly when the operators are prepared to accept more friction, less efficiency, more noise and more frequent replacement as they neglect lubrication and adjustment.

Many oil-based lubricants attract dirt and other particles, eventually forming an CZPT paste that will compound wear on chains. This problem can be circumvented by use of a “dry” PTFE spray, which forms a solid film after application and repels both particles and moisture.

VARIANTS DESIGN

Layout of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being used for a high wear application (for instance if it is just transmitting motion from a hand-operated lever to a control shaft on a machine, or a sliding door on an oven), then 1 of the simpler types of chain may still be used. Conversely, where extra strength but the smooth drive of a smaller pitch is required, the chain may be “siamesed”; instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or more rows of plates running parallel, with bushings and rollers between each adjacent pair, and the same number of rows of teeth running in parallel on the sprockets to match. Timing chains on automotive engines, for example, typically have multiple rows of plates called strands.

Roller chain is made in several sizes, the most common American National Standards Institute (ANSI) standards being 40, 50, 60, and 80. The first digit(s) indicate the pitch of the chain in eighths of an inch, with the last digit being 0 for standard chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. Thus, a chain with half-inch pitch would be a #40 while a #160 sprocket would have teeth spaced 2 inches apart, etc. Metric pitches are expressed in sixteenths of an inch; thus a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from plain carbon or alloy steel, but stainless steel is used in food processing machinery or other places where lubrication is a problem, and nylon or brass are occasionally seen for the same reason.

Roller chain is ordinarily hooked up using a master link (also known as a connecting link), which typically has 1 pin held by a horseshoe clip rather than friction fit, allowing it to be inserted or removed with simple tools. Chain with a removable link or pin is also known as cottered chain, which allows the length of the chain to be adjusted. Half links (also known as offsets) are available and are used to increase the length of the chain by a single roller. Riveted roller chain has the master link (also known as a connecting link) “riveted” or mashed on the ends. These pins are made to be durable and are not removable.

USE

An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain system
Roller chains are used in low- to mid-speed drives at around 600 to 800 feet per minute; however, at higher speeds, around 2,000 to 3,000 feet per minute, V-belts are normally used due to wear and noise issues.
A bicycle chain is a form of roller chain. Bicycle chains may have a master link, or may require a chain tool for removal and installation. A similar but larger and thus stronger chain is used on most motorcycles although it is sometimes replaced by either a toothed belt or a shaft drive, which offer lower noise level and fewer maintenance requirements.
The great majority of automobile engines use roller chains to drive the camshaft(s). Very high performance engines often use gear drive, and starting in the early 1960s toothed belts were used by some manufacturers.
Chains are also used in forklifts using hydraulic rams as a pulley to raise and lower the carriage; however, these chains are not considered roller chains, but are classified as lift or leaf chains.
Chainsaw cutting chains superficially resemble roller chains but are more closely related to leaf chains. They are driven by projecting drive links which also serve to locate the chain CZPT the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain drive from an air motor
A perhaps unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, where a chain drive from an air motor is used to rotate the movable engine nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for normal CZPT flight, a system known as Thrust vectoring.

WEAR

 

The effect of wear on a roller chain is to increase the pitch (spacing of the links), causing the chain to grow longer. Note that this is due to wear at the pivoting pins and bushes, not from actual stretching of the metal (as does happen to some flexible steel components such as the hand-brake cable of a motor vehicle).

With modern chains it is unusual for a chain (other than that of a bicycle) to wear until it breaks, since a worn chain leads to the rapid onset of wear on the teeth of the sprockets, with ultimate failure being the loss of all the teeth on the sprocket. The sprockets (in particular the smaller of the two) suffer a grinding motion that puts a characteristic hook shape into the driven face of the teeth. (This effect is made worse by a chain improperly tensioned, but is unavoidable no matter what care is taken). The worn teeth (and chain) no longer provides smooth transmission of power and this may become evident from the noise, the vibration or (in car engines using a timing chain) the variation in ignition timing seen with a timing light. Both sprockets and chain should be replaced in these cases, since a new chain on worn sprockets will not last long. However, in less severe cases it may be possible to save the larger of the 2 sprockets, since it is always the smaller 1 that suffers the most wear. Only in very light-weight applications such as a bicycle, or in extreme cases of improper tension, will the chain normally jump off the sprockets.

The lengthening due to wear of a chain is calculated by the following formula:

M = the length of a number of links measured

S = the number of links measured

P = Pitch

In industry, it is usual to monitor the movement of the chain tensioner (whether manual or automatic) or the exact length of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-center drive). A simpler method, particularly suitable for the cycle or motorcycle user, is to attempt to pull the chain away from the larger of the 2 sprockets, whilst ensuring the chain is taut. Any significant movement (e.g. making it possible to see through a gap) probably indicates a chain worn up to and beyond the limit. Sprocket damage will result if the problem is ignored. Sprocket wear cancels this effect, and may mask chain wear.

CHAIN STRENGTH

The most common measure of roller chain’s strength is tensile strength. Tensile strength represents how much load a chain can withstand under a one-time load before breaking. Just as important as tensile strength is a chain’s fatigue strength. The critical factors in a chain’s fatigue strength is the quality of steel used to manufacture the chain, the heat treatment of the chain components, the quality of the pitch hole fabrication of the linkplates, and the type of shot plus the intensity of shot peen coverage on the linkplates. Other factors can include the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain operating on a continuous drive is for the chain load to not exceed a mere 1/6 or 1/9 of the chain’s tensile strength, depending on the type of master links used (press-fit vs. slip-fit)[citation needed]. Roller chains operating on a continuous drive beyond these thresholds can and typically do fail prematurely via linkplate fatigue failure.

The standard minimum ultimate strength of the ANSI 29.1 steel chain is 12,500 x (pitch, in inches)2. X-ring and O-Ring chains greatly decrease wear by means of internal lubricants, increasing chain life. The internal lubrication is inserted by means of a vacuum when riveting the chain together.

CHAIN STHangZhouRDS

Standards organizations (such as ANSI and ISO) maintain standards for design, dimensions, and interchangeability of transmission chains. For example, the following Table shows data from ANSI standard B29.1-2011 (Precision Power Transmission Roller Chains, Attachments, and Sprockets) developed by the American Society of Mechanical Engineers (ASME). See the references[8][9][10] for additional information.

ASME/ANSI B29.1-2011 Roller Chain Standard SizesSizePitchMaximum Roller DiameterMinimum Ultimate Tensile StrengthMeasuring Load25

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Size Pitch Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load
25 0.250 in (6.35 mm) 0.130 in (3.30 mm) 780 lb (350 kg) 18 lb (8.2 kg)
35 0.375 in (9.53 mm) 0.200 in (5.08 mm) 1,760 lb (800 kg) 18 lb (8.2 kg)
41 0.500 in (12.70 mm) 0.306 in (7.77 mm) 1,500 lb (680 kg) 18 lb (8.2 kg)
40 0.500 in (12.70 mm) 0.312 in (7.92 mm) 3,125 lb (1,417 kg) 31 lb (14 kg)
50 0.625 in (15.88 mm) 0.400 in (10.16 mm) 4,880 lb (2,210 kg) 49 lb (22 kg)
60 0.750 in (19.05 mm) 0.469 in (11.91 mm) 7,030 lb (3,190 kg) 70 lb (32 kg)
80 1.000 in (25.40 mm) 0.625 in (15.88 mm) 12,500 lb (5,700 kg) 125 lb (57 kg)
100 1.250 in (31.75 mm) 0.750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 1.500 in (38.10 mm) 0.875 in (22.23 mm) 28,125 lb (12,757 kg) 281 lb (127 kg)
140 1.750 in (44.45 mm) 1.000 in (25.40 mm) 38,280 lb (17,360 kg) 383 lb (174 kg)
160 2.000 in (50.80 mm) 1.125 in (28.58 mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
180 2.250 in (57.15 mm) 1.460 in (37.08 mm) 63,280 lb (28,700 kg) 633 lb (287 kg)
200 2.500 in (63.50 mm) 1.562 in (39.67 mm) 78,175 lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (76.20 mm) 1.875 in (47.63 mm) 112,500 lb (51,000 kg) 1,000 lb (450 kg

For mnemonic purposes, below is another presentation of key dimensions from the same standard, expressed in fractions of an inch (which was part of the thinking behind the choice of preferred numbers in the ANSI standard):

Pitch (inches) Pitch expressed
in eighths
ANSI standard
chain number
Width (inches)
14 28 25 18
38 38 35 316
12 48 41 14
12 48 40 516
58 58 50 38
34 68 60 12
1 88 80 58

Notes:
1. The pitch is the distance between roller centers. The width is the distance between the link plates (i.e. slightly more than the roller width to allow for clearance).
2. The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
3. The left-hand digit denotes the number of eighths of an inch that make up the pitch.
4. An “H” following the standard number denotes heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on. Thus 60H-3 denotes number 60 heavyweight triple-strand chain.
 A typical bicycle chain (for derailleur gears) uses narrow 1⁄2-inch-pitch chain. The width of the chain is variable, and does not affect the load capacity. The more sprockets at the rear wheel (historically 3-6, nowadays 7-12 sprockets), the narrower the chain. Chains are sold according to the number of speeds they are designed to work with, for example, “10 speed chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, where 1/8″ refers to the maximum thickness of a sprocket that can be used with the chain.

Typically chains with parallel shaped links have an even number of links, with each narrow link followed by a broad one. Chains built up with a uniform type of link, narrow at 1 and broad at the other end, can be made with an odd number of links, which can be an advantage to adapt to a special chainwheel-distance; on the other side such a chain tends to be not so strong.

Roller chains made using ISO standard are sometimes called as isochains.

 

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1. Reliable Quality Assurance System
2. Cutting-Edge Computer-Controlled CNC Machines
3. Bespoke Solutions from Highly Experienced Specialists
4. Customization and OEM Available for Specific Application
5. Extensive Inventory of Spare Parts and Accessories
6. Well-Developed CZPT Marketing Network
7. Efficient After-Sale Service System

 

The 219 sets of advanced automatic production equipment provide guarantees for high product quality. The 167 engineers and technicians with senior professional titles can design and develop products to meet the exact demands of customers, and OEM customizations are also available with us. Our sound global service network can provide customers with timely after-sales technical services.

We are not just a manufacturer and supplier, but also an industry consultant. We work pro-actively with you to offer expert advice and product recommendations in order to end up with a most cost effective product available for your specific application. The clients we serve CZPT range from end users to distributors and OEMs. Our OEM replacements can be substituted wherever necessary and suitable for both repair and new assemblies.

 

Standard or Nonstandard: Standard
Application: Textile Machinery, Garment Machinery, Conveyer Equipment, Packaging Machinery, Electric Cars, Motorcycle, Food Machinery, Marine, Mining Equipment, Agricultural Machinery, Car, Food and Beverage Industry, Motorcycle Parts
Surface Treatment: Polishing
Structure: Roller Chain
Material: Alloy
Type: Short Pitch Chain
Samples:
US$ 0/Meter
1 Meter(Min.Order)

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Customization:
Available

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duplex chain

How do duplex chains handle variable speed applications?

Duplex chains are capable of handling variable speed applications with proper design and maintenance considerations. Here are some key points to understand:

  • Sprocket Selection: In variable speed applications, it’s essential to select appropriate sprockets that can accommodate the desired speed range. Sprockets with varying numbers of teeth or adjustable centers can be used to achieve different speeds.
  • Tensioning: Proper tensioning of the duplex chain is crucial in variable speed applications. The chain should be tensioned to a level that allows for smooth operation and prevents excessive slack or tightness. The tension should be adjusted based on the speed and load requirements.
  • Lubrication: Adequate lubrication is essential to reduce friction and wear in variable speed applications. The lubricant should be selected based on the speed and temperature requirements, and regular lubrication intervals should be followed to maintain optimal performance.
  • Maintenance: Regular inspection and maintenance are important in variable speed applications to detect any signs of wear or damage. Prompt replacement of worn components and proper adjustment of the chain tension are necessary to ensure smooth and reliable operation.
  • Proper Design: The overall design of the system should consider the variable speed requirements, including factors such as load variations, acceleration, and deceleration. The selection of the duplex chain and associated components should be based on the specific application requirements to ensure durability and performance.

It’s important to consult with chain manufacturers or industry experts when designing and selecting duplex chains for variable speed applications. They can provide guidance on the appropriate chain size, sprocket selection, lubrication requirements, and maintenance practices to ensure reliable and efficient operation in variable speed conditions.

duplex chain

What are the factors to consider when selecting a duplex chain for an application?

When selecting a duplex chain for an application, several factors need to be considered to ensure optimal performance and reliability. These factors include:

  • Load Capacity: Evaluate the maximum expected load the duplex chain will need to handle. Consider factors such as shock loads, intermittent loads, and dynamic forces to ensure the chain’s load capacity meets the application’s requirements.
  • Speed: Determine the operating speed of the chain drive system. Duplex chains have specific speed limitations based on their design and construction, and selecting a chain that can safely and effectively operate at the desired speed is crucial.
  • Environment: Assess the operating environment for the presence of corrosive substances, extreme temperatures, humidity, or contaminants. Choose a duplex chain with appropriate corrosion resistance, high-temperature capabilities, or special coatings if required.
  • Alignment and Tension: Consider the alignment accuracy and tensioning methods of the chain drive system. Proper alignment and tension are critical to ensure smooth operation, reduce wear, and minimize the risk of premature failure.
  • Maintenance: Evaluate the maintenance requirements of the duplex chain. Some chains may require regular lubrication, inspection, and adjustment, while others may be self-lubricating or maintenance-free. Select a chain that aligns with the available maintenance resources and schedules.
  • Cost: Consider the overall cost of the duplex chain, including initial purchase, installation, and ongoing maintenance. Balance the cost with the desired performance, durability, and expected lifespan of the chain.

By carefully considering these factors, it is possible to select a duplex chain that is well-suited for the specific application, ensuring efficient power transmission, durability, and reliability.

duplex chain

What materials are duplex chains typically made of?

Duplex chains are commonly made of high-quality materials known for their strength and durability. The choice of material depends on the specific application requirements and the environmental conditions the chain will be exposed to. Here are some of the materials typically used in the construction of duplex chains:

  • Alloy steel: Alloy steel is a popular choice for duplex chains due to its excellent strength, toughness, and wear resistance. The alloying elements added to the steel composition enhance its mechanical properties and allow the chain to withstand high loads and harsh operating conditions.
  • Stainless steel: Stainless steel is used when corrosion resistance is a critical factor. It is highly resistant to rust, corrosion, and chemical agents, making it suitable for applications in wet or corrosive environments. Stainless steel duplex chains are commonly used in food processing, pharmaceuticals, and outdoor equipment.
  • Carbon steel: Carbon steel is a cost-effective option that offers good strength and durability. It is suitable for applications with moderate loads and operating conditions. Carbon steel duplex chains are widely used in various industrial applications.
  • Plastic or polymer: In certain applications where noise reduction, lightweight, or corrosion resistance are important, plastic or polymer materials may be used for duplex chains. These materials provide low friction, resistance to chemicals, and can operate with minimal lubrication.

The material selection for a duplex chain depends on factors such as the required strength, environmental conditions, operating temperature, corrosion resistance, and the specific demands of the application. It’s important to consult with chain manufacturers or industry experts to determine the most suitable material for a particular application.

China Standard Gearbox Belt Transmission Parts Engineering and Construction Machinery 50-2 a Series Short Pitch Precision Duplex Roller Chains and Bush Chains  China Standard Gearbox Belt Transmission Parts Engineering and Construction Machinery 50-2 a Series Short Pitch Precision Duplex Roller Chains and Bush Chains
editor by CX 2023-07-19

China Hot selling Roller Chains Precision a Series Simplex& Bush Duplex Triplex Multiple Heavy Duty Cranked-Link Inverted Tooth Self-Tooth-Forming Hy-Vo Self-Lubrication Chains with Free Design Custom

ProductDescription

rollerchainsprecisionAseriesSimplex&bushDuplexTriplexMultipleHeavydutycranked-linkInvertedtoothSelf-tooth-formingHy-VoSelf-lubricationchains 

HZPTChainCorp. offersafullrangeofbothprecisionrollercZheJiang dengineered.Applicationsarevariedandrangefromconveyor,elevatortransfertobroadgeneralindustrialpowertransmissionspecialtyapplicationswithattachmentsand/orspecialmaterialsarealsoavailable.

BICYCLECHAIN:408,410,415

MOTORCYCLECHAIN:04C,25H,06C,T3,270H,415H,420,420L,425,428,428H,520,525,530

ASAROLLERCHAIN:35,40,41,fifty,sixty,60H,eighty,80H,100,120,a hundred and forty,a hundred and sixty,200,240(Catalog)

CHAIN(BRITISHSTHangZhouRD):05-B,06-B,08-B,10-B,twelve-B,sixteen-B,20-B,24-B,28-B,32-B,forty-B(Catalog)

LARGEPITCHCHAIN:100,100H,120,120H,one hundred forty,140H,160,160H,one hundred eighty,two hundred,240

Prolong-PITCHPRECISIONROLLERCHAINS:208A,208B,210A,210B,212A,212B,216A,216B,220A,220B,224A,224B,228B,232B

 

ROLLERCHAINSFORBEERBOTTLINETCONVEYORS:CK-70S,CK-100S,CK-100SA,CK-100SC,CK-133XA,CK-140X,CK-140XA,CK-150X,CK-150S,CK-154X,CK-155X,CK-155XA,CK-160X,CK-160XA,CK-160XB,CK-160XC,CK-165X,CK-165XA,CK-169,CK-180X,CK-180XA,CK-200S,CW-102,CW-127

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Roller Chain Maintenance Ideas

There are many things to hold in brain when sustaining a roller chain. The principal reasons consist of friction and exterior influences. Without having suitable lubrication and adjustment, this sort of chains will put on prematurely. Listed here are some guidelines for trying to keep your roller chain in leading form. continue reading through! This will make your procedure easier. We will also go over the cost of the new roller chain. As usually, keep in mind to check for free finishes and change the chain regularly.
chain

Preloading

Roller chains are created to accommodate a lot of various kinds of hundreds. Sprockets are the main lead to of chain put on. Axial and angular misalignment happens when the sprocket faces are not properly aligned. The two types of misalignment enhance tension and wear on the roller chain. They can also negatively have an effect on the push. As a result, deciding on the proper chain is an important thing to consider.
Preloading will help to eliminate original elongation and increase provider existence. The benefits of preloading can be seen in the preloading chart. Substantial elongation takes place for the duration of travel startup with no or minimal preload. This is due to the surface area hardness of the worn parts. On the other hand, a appropriately preloaded chain exhibits tiny elongation during the preliminary start. Consequently, appropriate preload can lengthen wear life.
Although elongation is a natural phenomenon in any generate, it can be minimized or eradicated with appropriate upkeep. In addition to typical inspections, you ought to do a complete inspection of your chain following the initial hundred several hours. This inspection need to focus on crucial daily life aspects these kinds of as 3% elongation, how the chain is lubricated, and any other issues that might have an effect on daily life. A very good good quality chain ought to have the longest lifestyle and no difficulties.
There are a lot of various roller chain requirements. A good rule of thumb is to choose chains with at the very least five back links. Then, tighten the chain until a crack occurs, and it will tell you what type of break happened. Alternatively, you can use a roller chain with the maximum allowable load. As long as the MAL doesn’t exceed that number, it is nonetheless perfectly protected to use it for any application.

lubricating

When it will come to lubrication, there are many various techniques. For example, spray lubrication is a well-liked approach for high-horsepower drives and large-load and quick-relocating devices. This technique is really efficient, but it is expensive, and spraying the chain as well much out of the guard can lead to leaks. An additional common strategy is brush lubrication. Brush lubrication entails implementing a continuous movement of oil to the chain, pushing it into the chain. This lubrication strategy minimizes the software temperature of the chain. Also, it can prolong the lifestyle of the chain, based on the manufacturer’s requirements.
Even though the lubrication of roller chain couplings may differ by application, sprocket hubs must be lubricated monthly to make sure appropriate sealing. The amount of oil employed relies upon on the rotational velocity and the variety of roller chain coupling. In general, lubricants utilized in roller chain couplings need to have outstanding adhesion, oxidation, and mechanical security.
Wear-resistant lubricants are advisable. They prevent the rollers from sticking to each other and avoid rusting. These lubricants have minimal floor tension and are not harmful to steel or O-ring chains. The the best possible lubrication approach depends on ambient temperature, horsepower, and chain pace. Correctly lubricating a roller chain increases the lifestyle of the chain and decreases the danger of use.
Appropriate lubrication of the roller chain is important to avert corrosion and lengthen its support life. The oil kinds a easy film on the chain components, minimizing metallic-to-metallic speak to and minimizing friction and use. Additionally, the oil supplies a clean running surface and decreases noise. Even so, the running-in approach of roller chain lubrication cannot be underestimated. When using heavy-obligation oils, make certain that the lubricant is compatible with operating and ambient temperatures.

Preserve

To prolong the lifestyle of your roller chain, you want to have out normal inspections. First, you must verify the T-pin on the website link plate at the joint. If they are not linked appropriately, it can result in the chain to extend and not sustain proper spacing and timing. Subsequent, you should appear for uncommon sounds, corrosion, and grime that could point out wear. If you recognize any of these issues, it really is time to substitute the chain.
In order to correctly maintain a roller chain, equally areas of the roller chain must be lubricated with the proper lubricant. Lubricants used should be SAE non-degreased oils. There are many types of lubricants offered, but the very best a single is a petroleum-based mostly oil with a substantial viscosity. You can also check out for indicators of use, such as purple or brown discoloration. This indicates that there is not ample lubrication.
Although the daily life expectancy of a roller chain is mysterious, it is critical to know how to prolong its lifestyle and increase its efficiency. Incorrect rigidity and alignment can shorten its existence and spot undue anxiety on the push method and the chain by itself. Incorrect rigidity can also lead to slippage and improved vitality output. Therefore, you should compute the pressure and alignment of the chain in the course of the original set up. Check out and modify often.
An additional way to extend the existence of your rollers is to completely clear the inside of and exterior of the rollers. You need to also lubricate it usually to avert too much heat buildup. Designed to stop overheating by limiting the sum of work throughout split-ins. In addition, regular inspections will aid you catch anomalies early ample to stop operations. Very last but not minimum, typical lubrication will lengthen the lifestyle of the roller chain.

Price

Buying a roller chain is a big choice, but preliminary expense should not be the only consideration. The value of the roller chain by itself, as nicely as the operating fees, ought to be regarded. Even the lowest-priced chains can be more costly in the long run. Additionally, servicing and strength costs might boost. The very best roller chain for your enterprise will be the one particular that best suits your demands. Shown under are some considerations to consider when purchasing a roller chain.
First, what material need to you use? Roller chains occur in a lot of diverse components. Stainless steel is a generally utilized content in design. Resources are selected primarily based on the price and design and style of chain horsepower transmission. Various manufacturing processes will figure out which material is ideal for your software. Also, the excess weight of the chain will fluctuate relying on its pitch and the development strategy used. A massive part of the price of a roller chain is on the drive sprocket.
An additional consideration is set up cost. Roller chains are typically utilized in agricultural and transportation purposes, specially for agronomic merchandise. If lubrication is your worry, routine maintenance-totally free chains are the greatest option. Corrosion-resistant chains are excellent for wet environments. They are marketed in boxed lengths, so replacing a more time length requires including a shorter size. To steer clear of trouble, use the skateboard to aid join the backlinks.
Another thought is the total width. The all round width of an open #forty roller chain could range but need to be at least 10 feet extensive. Despite the fact that it is not the most costly type of roller chain, it will last longer. Making use of it accurately will enhance its overall longevity, so it truly is a great notion to decide on it correctly. If your organization makes use of roller chains regularly, the cost reduction is properly well worth it.
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Application

A roller chain is composed of a pair of alternating pins and roller back links. The pins are pressed into the side panels and hinged to the rollers. Roller chains can be solitary or multi-strand, related by a typical pin. The multi-strand style gives greater shear strength for demanding energy transmission apps. Common purposes for roller chains contain conveyors, hoists, and other mechanical equipment.
The horsepower ability of a roller chain is limited by several elements, including pin shock and friction. Whilst analysis into these elements has placed some boundaries on the greatest operating speed of the roller chain, sensible encounter has demonstrated that these programs can be utilized at higher speeds. Appropriate lubrication and cooling can increase the longevity of these chains. In addition, roller chain programs consist of:
Travel and conveyor programs are the two principal employs of roller chains. In the course of driving functions, use and elongation are a natural portion of the procedure. Nevertheless, lubrication plays a vital role in minimizing put on and shock hundreds. For that reason, use is inescapable and special treatment should be taken to make sure correct lubrication. Additionally, lubrication lowers warmth dissipation in the chain.
The resources utilized to make roller chains fluctuate from 1 sort to another. Stainless steel is frequent, but nylon or brass are at times employed. These resources are much less expensive and more resilient than steel or stainless metal. The ideal content for the task relies upon on a range of elements, like expense, environmental situations, and layout horsepower transmission. For example, the pin bushing get in touch with spot is a crucial spot necessitating lubrication. Additionally, some coatings are designed to retard the corrosive consequences of h2o or oil.
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