China Professional 12b-1 B Series Short Pitch Precision Simplex Roller Chains and Bush Chains near me factory

Item Description

B Collection Brief pitch Precision Simplex Roller Chains & Bush Chains


Chain No.


Roller diameter


Width in between inner plates
Pin diameter


Pin size Inner plate depth
Plate thickness


Tensile power


Average tensile energy
Weight for each meter
12B-1 19.050 12.07 11.68 five.seventy two 22.fifty 24.2 sixteen.00 1.eighty five 29./6591 32.two one.fifteen

*Straight facet plates


Roller chain or bush roller chain is the type of chain push most frequently utilised for transmission of mechanical electricity on a lot of kinds of domestic, industrial and agricultural equipment, such as conveyors, wire- and tube-drawing machines, printing presses, vehicles, bikes, and bicycles. It is composed of a series of short cylindrical rollers held jointly by aspect hyperlinks. It is pushed by a toothed wheel known as a sprocket. It is a simple, reliable, and successful signifies of energy transmission.


Two various measurements of roller chain, displaying design.
There are 2 sorts of hyperlinks alternating in the bush roller chain. The 1st sort is inner backlinks, possessing 2 interior plates held with each other by 2 sleeves or bushings on which rotate 2 rollers. Interior back links alternate with the next kind, the outer links, consisting of 2 outer plates held with each other by pins passing by way of the bushings of the inner hyperlinks. The “bushingless” roller chain is similar in procedure however not in building rather of separate bushings or sleeves holding the inner plates together, the plate has a tube stamped into it protruding from the gap which serves the identical objective. This has the gain of eliminating 1 step in assembly of the chain.

The roller chain design and style lowers friction compared to less complicated patterns, resulting in increased efficiency and much less use. The authentic power transmission chain varieties lacked rollers and bushings, with equally the internal and outer plates held by pins which directly contacted the sprocket teeth however this configuration exhibited very speedy wear of the two the sprocket teeth, and the plates exactly where they pivoted on the pins. This problem was partly solved by the development of bushed chains, with the pins holding the outer plates passing by way of bushings or sleeves connecting the inner plates. This distributed the wear more than a greater spot even so the tooth of the sprockets nevertheless wore more quickly than is appealing, from the sliding friction towards the bushings. The addition of rollers bordering the bushing sleeves of the chain and supplied CZPT get in touch with with the teeth of the sprockets resulting in outstanding resistance to put on of both sprockets and chain as effectively. There is even quite reduced friction, as extended as the chain is adequately lubricated. Continuous, cleanse, lubrication of roller chains is of major relevance for effective operation as properly as proper tensioning.


A lot of driving chains (for illustration, in manufacturing unit gear, or driving a camshaft within an inside combustion engine) work in cleanse environments, and thus the putting on surfaces (that is, the pins and bushings) are risk-free from precipitation and airborne grit, a lot of even in a sealed surroundings this sort of as an oil bath. Some roller chains are made to have o-rings built into the space amongst the outdoors url plate and the inside of roller url plates. Chain producers started to consist of this feature in 1971 right after the application was invented by Joseph Montano even though doing work for Whitney Chain of Hartford, Connecticut. O-rings had been incorporated as a way to increase lubrication to the hyperlinks of power transmission chains, a service that is vitally crucial to extending their working existence. These rubber fixtures form a barrier that holds manufacturing unit applied lubricating grease inside the pin and bushing use regions. Additional, the rubber o-rings avoid dust and other contaminants from moving into inside of the chain linkages, where these kinds of particles would normally trigger significant dress in.[quotation essential]

There are also several chains that have to function in filthy circumstances, and for size or operational motives can’t be sealed. Illustrations consist of chains on farm products, bicycles, and chain saws. These chains will automatically have comparatively large rates of put on, notably when the operators are prepared to acknowledge more friction, much less effectiveness, far more sounds and much more frequent CZPT as they neglect lubrication and adjustment.

Several oil-dependent lubricants appeal to dust and other particles, ultimately forming an CZPT paste that will compound use on chains. This problem can be circumvented by use of a “dry” PTFE spray, which kinds a solid movie after software and repels the two particles and humidity.


Structure of a roller chain: 1. Outer plate, 2. Inner plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not getting used for a high put on application (for occasion if it is just transmitting movement from a hand-operated lever to a control shaft on a machine, or a sliding doorway on an oven), then 1 of the less difficult varieties of chain might nevertheless be utilized. Conversely, the place further power but the smooth generate of a smaller pitch is necessary, the chain may possibly be “siamesed” instead of just 2 rows of plates on the outer sides of the chain, there may be 3 (“duplex”), 4 (“triplex”), or much more rows of plates running parallel, with bushings and rollers in between every single adjacent pair, and the identical variety of rows of enamel operating in parallel on the sprockets to match. Timing chains on automotive engines, for illustration, normally have numerous rows of plates named strands.

Roller chain is created in many measurements, the most frequent American National Expectations Institute (ANSI) expectations becoming forty, fifty, sixty, and 80. The initial digit(s) show the pitch of the chain in eighths of an inch, with the previous digit getting 0 for regular chain, 1 for lightweight chain, and 5 for bushed chain with no rollers. As a result, a chain with 50 %-inch pitch would be a #forty although a #160 sprocket would have enamel spaced 2 inches aside, etc. Metric pitches are expressed in sixteenths of an inch thus a metric #8 chain (08B-1) would be equal to an ANSI #40. Most roller chain is made from basic carbon or alloy metal, but stainless metal is employed in meals processing equipment or other locations where lubrication is a problem, and nylon or brass are sometimes observed for the same explanation.

Roller chain is ordinarily hooked up using a master website link (also recognized as a connecting link), which usually has 1 pin held by a horseshoe clip fairly than friction in shape, permitting it to be inserted or eliminated with easy equipment. Chain with a removable url or pin is also identified as cottered chain, which makes it possible for the size of the chain to be altered. Half links (also acknowledged as offsets) are offered and are utilised to improve the length of the chain by a single roller. Riveted roller chain has the learn link (also acknowledged as a connecting url) “riveted” or mashed on the ends. These pins are made to be tough and are not detachable.


An example of 2 ‘ghost’ sprockets tensioning a triplex roller chain program
Roller chains are employed in minimal- to mid-speed drives at around 600 to 800 feet for every moment nonetheless, at greater speeds, around 2,000 to 3,000 ft for each moment, V-belts are generally utilised owing to put on and noise concerns.
A bicycle chain is a form of roller chain. Bicycle chains may have a master url, or may possibly demand a chain device for removing and installation. A similar but greater and as a result much better chain is utilised on most bikes though it is sometimes replaced by either a toothed belt or a shaft generate, which provide reduce noise stage and fewer routine maintenance needs.
The fantastic greater part of car engines use roller chains to travel the camshaft(s). Very high functionality engines usually use gear generate, and starting up in the early sixties toothed belts ended up utilized by some companies.
Chains are also used in forklifts using hydraulic rams as a pulley to CZPT and reduce the carriage nevertheless, these chains are not regarded as roller chains, but are labeled as elevate or leaf chains.
Chainsaw chopping chains superficially resemble roller chains but are more intently relevant to leaf chains. They are driven by projecting travel backlinks which also provide to locate the chain onto the bar.

Sea Harrier FA.2 ZA195 front (cold) vector thrust nozzle – the nozzle is rotated by a chain travel from an air motor
A probably unusual use of a pair of motorcycle chains is in the Harrier Jump Jet, exactly where a chain push from an air motor is utilized to rotate the movable motor nozzles, allowing them to be pointed downwards for hovering flight, or to the rear for typical forward flight, a system identified as Thrust vectoring.

Dress in


The result of put on on a roller chain is to boost the pitch (spacing of the back links), leading to the chain to increase lengthier. Note that this is thanks to use at the pivoting pins and bushes, not from genuine stretching of the metal (as does occur to some versatile metal components such as the hand-brake cable of a motor automobile).

With CZPT chains it is uncommon for a chain (other than that of a bicycle) to put on until it breaks, because a worn chain qualified prospects to the speedy onset of use on the tooth of the sprockets, with ultimate failure getting the loss of all the tooth on the sprocket. The sprockets (in distinct the more compact of the two) undergo a grinding movement that puts a characteristic hook shape into the pushed experience of the tooth. (This influence is created even worse by a chain improperly tensioned, but is unavoidable no subject what care is taken). The worn tooth (and chain) no lengthier provides clean transmission of electricity and this could turn into apparent from the noise, the vibration or (in vehicle engines using a timing chain) the variation in ignition timing noticed with a timing mild. Equally sprockets and chain ought to be replaced in these circumstances, considering that a new chain on worn sprockets will not previous prolonged. Nonetheless, in less extreme instances it might be attainable to conserve the larger of the 2 sprockets, given that it is usually the smaller 1 that suffers the most put on. Only in really light-bodyweight apps such as a bicycle, or in extreme instances of poor pressure, will the chain typically leap off the sprockets.

The lengthening because of to dress in of a chain is calculated by the adhering to formulation:

M = the size of a number of hyperlinks calculated

S = the number of back links measured

P = Pitch

In industry, it is common to keep an eye on the movement of the chain tensioner (whether or not handbook or computerized) or the precise length of a drive chain (a single rule of thumb is to replace a roller chain which has elongated 3% on an adjustable drive or 1.5% on a fixed-middle generate). A simpler strategy, especially suitable for the cycle or bike user, is to try to pull the chain away from the greater of the 2 sprockets, whilst making sure the chain is taut. Any important motion (e.g. creating it achievable to see by way of a gap) most likely signifies a chain worn up to and over and above the limit. Sprocket damage will end result if the issue is ignored. Sprocket dress in cancels this influence, and could mask chain put on.


The most widespread measure of roller chain’s strength is tensile toughness. Tensile toughness signifies how considerably load a chain can endure beneath a one-time load ahead of breaking. Just as important as tensile power is a chain’s fatigue strength. The crucial aspects in a chain’s fatigue strength is the good quality of steel utilized to CZPT the chain, the heat therapy of the chain elements, the quality of the pitch gap fabrication of the linkplates, and the kind of shot furthermore the depth of shot peen protection on the linkplates. Other factors can contain the thickness of the linkplates and the design (contour) of the linkplates. The rule of thumb for roller chain functioning on a continuous push is for the chain load to not CZPT a mere 1/6 or 1/9 of the chain’s tensile toughness, relying on the variety of master backlinks utilized (push-match vs. slip-in shape)[citation essential]. Roller chains working on a continuous drive past these thresholds can and typically do fall short prematurely by way of linkplate tiredness failure.

The standard minimal greatest strength of the ANSI 29.1 metal chain is 12,five hundred x (pitch, in inches)two. X-ring and O-Ring chains significantly lessen wear by implies of interior lubricants, growing chain lifestyle. The interior lubrication is inserted by indicates of a vacuum when riveting the chain with each other.


Specifications organizations (such as ANSI and ISO) sustain expectations for style, dimensions, and interchangeability of transmission chains. For case in point, the adhering to Table displays info from ANSI regular B29.1-2011 (Precision Electricity Transmission Roller Chains, Attachments, and Sprockets) designed by the American Culture of Mechanical Engineers (ASME). See the references[8][9][ten] for added information.

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

ASME/ANSI B29.1-2011 Roller Chain Standard Sizes
Dimension Pitch Greatest Roller Diameter Minimal Greatest Tensile Power Measuring Load
twenty five .250 in (6.35 mm) .130 in (3.thirty mm) 780 lb (350 kg) eighteen lb (8.2 kg)
35 .375 in (9.53 mm) .two hundred in (5.08 mm) 1,760 lb (800 kg) 18 lb (8.2 kg)
forty one .five hundred in (12.70 mm) .306 in (7.seventy seven mm) 1,five hundred lb (680 kg) 18 lb (8.2 kg)
forty .five hundred in (12.70 mm) .312 in (7.92 mm) three,one hundred twenty five lb (1,417 kg) 31 lb (14 kg)
fifty .625 in (fifteen.88 mm) .400 in (10.16 mm) four,880 lb (2,210 kg) forty nine lb (22 kg)
sixty .750 in (19.05 mm) .469 in (11.91 mm) 7,030 lb (3,190 kg) 70 lb (32 kg)
80 1.000 in (25.40 mm) .625 in (15.88 mm) twelve,500 lb (5,seven hundred kg) 125 lb (57 kg)
a hundred one.250 in (31.75 mm) .750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 one.five hundred in (38.10 mm) .875 in (22.23 mm) 28,125 lb (twelve,757 kg) 281 lb (127 kg)
140 1.750 in (44.45 mm) one.000 in (25.40 mm) 38,280 lb (seventeen,360 kg) 383 lb (174 kg)
one hundred sixty two.000 in (fifty.80 mm) one.125 in (28.fifty eight mm) 50,000 lb (23,000 kg) 500 lb (230 kg)
180 two.250 in (57.fifteen mm) 1.460 in (37.08 mm) 63,280 lb (28,700 kg) 633 lb (287 kg)
200 two.five hundred in (sixty three.fifty mm) one.562 in (39.sixty seven mm) seventy eight,a hundred seventy five lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (seventy six.twenty mm) 1.875 in (47.63 mm) 112,500 lb (fifty one,000 kg) one,000 lb (450 kg

For mnemonic functions, underneath is one more presentation of crucial dimensions from the exact same standard, expressed in fractions of an inch (which was element of the thinking powering the choice of chosen quantities in the ANSI normal):

Pitch (inches) Pitch expressed
in eighths
ANSI common
chain quantity
Width (inches)
14 2eight two5 one8
3eight three8 3five 316
1two foureight 41 onefour
12 foureight 4 five16
5eight five8 five three8
three4 six8 6 12
1 eight8 8 five8

one. The pitch is the distance in between roller facilities. The width is the length between the url plates (i.e. a bit more than the roller width to allow for clearance).
2. The right-hand digit of the common denotes 0 = regular chain, 1 = lightweight chain, 5 = rollerless bushing chain.
three. The left-hand digit denotes the amount of eighths of an inch that make up the pitch.
four. An “H” subsequent the normal number denotes heavyweight chain. A hyphenated quantity following the regular amount denotes double-strand (2), triple-strand (3), and so on. Therefore 60H-3 denotes amount sixty heavyweight triple-strand chain.
 A standard bicycle chain (for derailleur gears) makes use of slim 1⁄2-inch-pitch chain. The width of the chain is variable, and does not impact the load capacity. The more sprockets at the rear wheel (traditionally 3-6, nowadays 7-twelve sprockets), the narrower the chain. Chains are bought in accordance to the amount of speeds they are developed to perform with, for case in point, “10 pace chain”. Hub gear or single pace bicycles use 1/2″ x 1/8″ chains, in which 1/8″ refers to the maximum thickness of a sprocket that can be utilized with the chain.

Usually chains with parallel formed hyperlinks have an even quantity of back links, with every single slender hyperlink adopted by a broad 1.Chains constructed up with a uniform sort of hyperlink, narrow at 1 and wide at the other end, can be created with an odd number of back links, which can be an advantage to adapt to a special chainwheel-length on the other facet such a chain tends to be not so strong.

Roller chains produced utilizing ISO regular are occasionally called as isochains.


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Like all of our roller chains, our solitary-strand roller chains are heat dipped to guarantee one hundred% lubricated elements and heat taken care of to improve put on resistance. Our hot dip lubrication technique guarantees that each solitary strand roller chain operates at greatest capacity and dress in life for as extended as possible. EP Chain proudly delivers hugely durable solitary chain roller chains for your usefulness. Each and every of our single-strand roller chains is preloaded throughout the manufacturing approach, successfully lowering preliminary elongation right after you get your product. You will find our one-strand roller chains utilized in a assortment of applications, such as the foodstuff sector or conveyor belts. At EP Chain, we comprehend that downtime can imply dropped organization and income. Our single-strand roller chains are the missing hyperlink your company wants to hold devices and every day functions working easily.
This variety of chain is used in the preliminary stages of electrical power transmission growth. When the sprocket moves nearer to or absent from the teeth, sound is designed as the tooth rub against the connecting rod. These sorts of chains are employed to some extent for low-speed conveyor chains.

China Professional 12b-1 B Collection Brief Pitch Precision Simplex Roller Chains and Bush Chains     around me manufacturing unit

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