Product Description

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

t/Tmax
mm

Transverse pitch

Pt
mm

Breaking load

Q
kN/lbf

Weight per meter
q kg/m
Lmax
mm
Lcmax
mm
28ASS-2 44.450 25.40 25.22 12.70 103.30 107.90 41.00 5.60 48.87 204.0/45859 15.14

*Bush chain:d1 in the table indicates the external diameter of the bush
*Straight side plates
Stainless steel chains are suitable for corrosive conditions involving food,chemicals pharmaceuticals,etc.and also suitable for high and low temperature conditions.

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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[1] means of power transmission.

Though CZPT Renold is credited with inventing the roller chain in 1880, sketches by Leonardo da Vinci in the 16th century show a chain with a roller bearing.

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 in 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.
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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

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 standards

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.

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):

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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A: yes, we offer OEM/ODM service, we support the customized logo, size, package,etc.

Q: Can you make chains according to my CAD drawings?
A: Yes. Besides the regular standard chains, we produce non-standard and custom-design products to meet the specific technical requirements. In reality, a sizable portion of our production capacity is assigned to make non-standard products.

 
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A: North America, South America, Eastern Europe, Western Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia,
 
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A: Yes, Samples can be provided.
 
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A: We will responsible for all the quality problems.
 

 

 

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Can a gear chain be used in automotive applications?

Yes, gear chains can be used in various automotive applications due to their ability to transmit power and motion efficiently. Here are some common automotive applications where gear chains are utilized:

1. Engine Timing Systems:

– Gear chains are commonly employed in engine timing systems to synchronize the rotation of the camshaft and crankshaft. They ensure precise valve timing and optimize engine performance.

2. Transfer Cases:

– Gear chains are used in transfer cases of all-wheel-drive and four-wheel-drive vehicles. They transmit power from the transmission to the front and rear axles, allowing for smooth and controlled power distribution.

3. Steering Systems:

– Some automotive steering systems utilize gear chains to transmit motion and torque from the steering wheel to the wheels. Gear chains provide a reliable and efficient means of translating steering input into vehicle movement.

4. Variable Valve Timing Systems:

– Gear chains are employed in variable valve timing systems to adjust the timing of the engine’s intake and exhaust valves. This allows for optimized combustion and improved fuel efficiency.

5. Transmissions:

– Gear chains can be found in certain types of transmissions, such as continuously variable transmissions (CVTs). They play a crucial role in transmitting power between the engine and wheels, enabling smooth and efficient gear ratio changes.

6. Power Steering Pumps:

– In hydraulic power steering systems, gear chains are used to transfer power from the engine to the power steering pump. They ensure reliable operation and assist in providing effortless steering.

7. Actuator Systems:

– Gear chains can be utilized in various actuator systems within an automobile, such as seat adjustments, window mechanisms, and convertible top mechanisms. They enable precise and reliable motion control.

These are just a few examples of how gear chains are employed in automotive applications. With their robust construction, high efficiency, and reliable power transmission capabilities, gear chains play a vital role in ensuring the smooth and efficient operation of various automotive systems.

How do you troubleshoot common issues with gear chains?

Troubleshooting common issues with gear chains involves a systematic approach to identify and resolve the underlying problems. Here are some steps to troubleshoot gear chain issues:

1. Visual Inspection: Start by visually inspecting the gear chain for any visible damage, such as broken teeth, worn links, or misalignment. Look for signs of excessive wear, inadequate lubrication, or contamination.

2. Noise and Vibration: Listen for unusual noise or vibrations during operation. Excessive noise or vibration can indicate misalignment, worn gears, or inadequate lubrication.

3. Load and Torque: Check if the gear chain is handling the load and torque requirements of the application. Overloading can cause premature wear and damage to the chain.

4. Lubrication: Evaluate the lubrication system to ensure proper lubrication is provided to the gear chain. Inadequate or improper lubrication can lead to increased friction, wear, and overheating.

5. Alignment: Check the alignment of the gear chain and ensure that the gears are properly meshing. Misalignment can cause excessive wear and noise.

6. Maintenance Records: Review the maintenance records to ensure that the gear chain has been regularly inspected, lubricated, and maintained according to the manufacturer’s recommendations.

7. Consult the Manufacturer: If troubleshooting steps do not resolve the issue, it is advisable to consult the gear chain manufacturer or a qualified professional for further guidance and assistance.

By systematically addressing these troubleshooting steps, you can identify and resolve common issues with gear chains, ensuring their optimal performance and longevity.

What industries commonly use gear chains?

Gear chains find applications in various industries where precise power transmission, speed control, and high load capacity are required. Some common industries that use gear chains include:

– Automotive: Gear chains are utilized in automotive systems such as engines, transmissions, and differentials for efficient power transfer and speed control.

– Machinery: Gear chains are widely used in machinery applications such as industrial equipment, manufacturing machinery, and heavy machinery where precise speed control and high load capacity are crucial.

– Robotics: Gear chains play a vital role in robotic systems, enabling precise and controlled movement in robotic arms, joints, and other mechanical components.

– Aerospace: Gear chains are used in aerospace applications for tasks such as actuating flight control surfaces, adjusting landing gear, and controlling various mechanical systems within aircraft.

– Material Handling: Gear chains are employed in material handling equipment such as conveyors, elevators, and hoists to ensure reliable and efficient movement of goods and materials.

– Power Generation: Gear chains are utilized in power generation systems, including wind turbines, hydroelectric plants, and steam turbines, where they facilitate the transfer of rotational motion and torque.

– Marine: Gear chains are found in marine applications like ship propulsion systems, steering mechanisms, and winches, providing reliable power transmission and control.

– Mining: Gear chains are used in mining equipment, such as conveyors, crushers, and excavators, to handle heavy loads and ensure efficient operation in demanding mining environments.

– Agricultural: Gear chains are employed in agricultural machinery, including tractors, combines, and harvesters, for power transmission and control in various agricultural processes.

– Construction: Gear chains are utilized in construction machinery such as cranes, excavators, and loaders, where they enable precise control and reliable power transmission.

– Industrial Automation: Gear chains are used in industrial automation systems for tasks such as robotic assembly, packaging, and material handling, ensuring precise movement and efficient power transfer.

In summary, gear chains have wide-ranging applications across industries such as automotive, machinery, robotics, aerospace, material handling, power generation, marine, mining, agricultural, construction, and industrial automation.

China Standard Duplex Stainless Steel 28ass-2 Industrial Transmission Gear Reducer Conveyor Parts Short Pitch Roller Chains and Bush Chain  China Standard Duplex Stainless Steel 28ass-2 Industrial Transmission Gear Reducer Conveyor Parts Short Pitch Roller Chains and Bush Chain
editor by CX 2023-07-19