China Good quality 12b-1 B Series Short Pitch Precision Simplex Roller Chains and Bush Chains near me supplier

Product Description

B Collection Short 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 strength


Average tensile energy
Weight per meter
12B-1 19.050 12.07 11.sixty eight 5.72 22.fifty 24.two sixteen.00 1.85 29./6591 32.2 one.15

*Straight facet plates


Roller chain or bush roller chain is the kind of chain push most generally utilized for transmission of mechanical energy on a lot of varieties of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing devices, printing presses, autos, motorcycles, and bicycles. It is made up of a series of short cylindrical rollers held jointly by facet hyperlinks. It is driven by a toothed wheel known as a sprocket. It is a simple, dependable, and successful implies of power transmission.

Development OF THE CHAIN

Two different dimensions of roller chain, demonstrating development.
There are 2 sorts of backlinks alternating in the bush roller chain. The very first kind is interior backlinks, having 2 internal plates held together by 2 sleeves or bushings upon which rotate 2 rollers. Internal backlinks alternate with the 2nd variety, the outer backlinks, consisting of 2 outer plates held together by pins passing via the bushings of the inner back links. The “bushingless” roller chain is similar in procedure though not in design rather of individual bushings or sleeves keeping the inner plates jointly, the plate has a tube stamped into it protruding from the gap which serves the exact same function. This has the gain of taking away 1 action in assembly of the chain.

The roller chain design minimizes friction when compared to less complicated styles, resulting in greater effectiveness and less put on. The first power transmission chain versions lacked rollers and bushings, with equally the internal and outer plates held by pins which directly contacted the sprocket enamel nonetheless this configuration exhibited extremely quick put on of each the sprocket teeth, and the plates exactly where they pivoted on the pins. This difficulty was partly solved by the growth of bushed chains, with the pins keeping the outer plates passing through bushings or sleeves connecting the inner plates. This distributed the put on over a greater spot nonetheless the tooth of the sprockets even now wore a lot more speedily than is attractive, from the sliding friction from the bushings. The addition of rollers encompassing the bushing sleeves of the chain and presented CZPT get in touch with with the enamel of the sprockets resulting in superb resistance to use of both sprockets and chain as nicely. There is even extremely lower friction, as long as the chain is sufficiently lubricated. Continuous, cleanse, lubrication of roller chains is of major value for effective operation as well as proper tensioning.


A lot of driving chains (for illustration, in factory products, or driving a camshaft inside an interior combustion motor) work in clear environments, and hence the sporting surfaces (that is, the pins and bushings) are risk-free from precipitation and airborne grit, many even in a sealed surroundings such as an oil bathtub. Some roller chains are designed to have o-rings built into the place between the outside the house website link plate and the inside roller hyperlink plates. Chain companies started to consist of this characteristic in 1971 after the software was invented by Joseph Montano while doing work for Whitney Chain of Hartford, Connecticut. O-rings have been incorporated as a way to enhance lubrication to the back links of electrical power transmission chains, a service that is vitally crucial to extending their functioning lifestyle. These rubber fixtures form a barrier that holds manufacturing facility utilized lubricating grease within the pin and bushing put on locations. More, the rubber o-rings avert filth and other contaminants from moving into within the chain linkages, in which this sort of particles would in any other case lead to considerable use.[citation necessary]

There are also several chains that have to function in dirty problems, and for dimension or operational causes can not be sealed. Examples include chains on farm equipment, bicycles, and chain saws. These chains will always have comparatively higher rates of use, particularly when the operators are ready to take far more friction, considerably less performance, far more sound and a lot more frequent CZPT as they neglect lubrication and adjustment.

Numerous oil-primarily based lubricants appeal to grime and other particles, eventually forming an CZPT paste that will compound use on chains. This problem can be circumvented by use of a “dry” PTFE spray, which varieties a solid film soon after software and repels equally particles and humidity.


Structure of a roller chain: 1. Outer plate, 2. Internal plate, 3. Pin, 4. Bushing, 5. Roller
If the chain is not being utilised for a high dress in 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 nonetheless be employed. Conversely, where extra toughness but the smooth push of a smaller pitch is needed, the chain may be “siamesed” rather of just 2 rows of plates on the outer sides of the chain, there could be 3 (“duplex”), 4 (“triplex”), or much more rows of plates operating parallel, with bushings and rollers amongst every single adjacent pair, and the same amount of rows of tooth operating in parallel on the sprockets to match. Timing chains on automotive engines, for illustration, usually have multiple rows of plates referred to as strands.

Roller chain is made in many sizes, the most frequent American Countrywide Specifications Institute (ANSI) expectations becoming 40, 50, 60, and eighty. The first digit(s) show the pitch of the chain in eighths of an inch, with the previous digit currently being 0 for regular chain, 1 for light-weight chain, and 5 for bushed chain with no rollers. Therefore, a chain with half-inch pitch would be a #forty whilst a #one hundred sixty sprocket would have enamel spaced 2 inches aside, and so forth. Metric pitches are expressed in sixteenths of an inch therefore a metric #8 chain (08B-1) would be equivalent to an ANSI #40. Most roller chain is made from basic carbon or alloy steel, but stainless steel is utilized in foodstuff processing equipment or other areas the place lubrication is a problem, and nylon or brass are occasionally seen for the exact same cause.

Roller chain is ordinarily hooked up using a master website link (also known as a connecting url), which normally has 1 pin held by a horseshoe clip rather than friction match, making it possible for it to be inserted or taken off with simple resources. Chain with a removable link or pin is also identified as cottered chain, which permits the length of the chain to be modified. 50 % back links (also known as offsets) are available and are used to boost the size of the chain by a single roller. Riveted roller chain has the learn link (also known as a connecting website link) “riveted” or mashed on the ends. These pins are created to be tough and are not detachable.


An illustration of 2 ‘ghost’ sprockets tensioning a triplex roller chain technique
Roller chains are utilised in reduced- to mid-velocity drives at close to 600 to 800 ft for each moment nevertheless, at larger speeds, around 2,000 to 3,000 feet per minute, V-belts are usually utilized due to put on and sounds issues.
A bicycle chain is a form of roller chain. Bicycle chains might have a master url, or may require a chain device for elimination and set up. A similar but greater and thus more powerful chain is employed on most bikes though it is often changed by either a toothed belt or a shaft generate, which offer you decrease sounds amount and less maintenance needs.
The wonderful majority of vehicle engines use roller chains to drive the camshaft(s). Really substantial efficiency engines frequently use gear drive, and starting up in the early nineteen sixties toothed belts have been used by some producers.
Chains are also utilized in forklifts using hydraulic rams as a pulley to CZPT and lower the carriage however, these chains are not regarded as roller chains, but are labeled as elevate or leaf chains.
Chainsaw reducing chains superficially resemble roller chains but are far more carefully connected to leaf chains. They are pushed by projecting generate hyperlinks which also provide to locate the chain on to the bar.

Sea Harrier FA.2 ZA195 entrance (chilly) vector thrust nozzle – the nozzle is rotated by a chain generate from an air motor
A possibly abnormal use of a pair of bike chains is in the Harrier Jump Jet, exactly where a chain generate from an air motor is utilised to rotate the movable motor nozzles, permitting them to be pointed downwards for hovering flight, or to the rear for typical ahead flight, a system acknowledged as Thrust vectoring.



The impact of wear on a roller chain is to increase the pitch (spacing of the back links), leading to the chain to grow more time. Be aware that this is owing to wear at the pivoting pins and bushes, not from genuine stretching of the metallic (as does occur to some flexible metal parts this sort of as the hand-brake cable of a motor automobile).

With CZPT chains it is unusual for a chain (other than that of a bicycle) to put on until finally it breaks, since a worn chain prospects to the speedy onset of use on the tooth of the sprockets, with final failure being the loss of all the enamel on the sprocket. The sprockets (in certain the smaller sized of the two) endure a grinding movement that puts a characteristic hook shape into the driven encounter of the enamel. (This effect is manufactured even worse by a chain improperly tensioned, but is unavoidable no issue what care is taken). The worn teeth (and chain) no more time supplies easy transmission of electrical power and this could become apparent from the sound, the vibration or (in car engines employing a timing chain) the variation in ignition timing witnessed with a timing light. Each sprockets and chain should be changed in these instances, given that a new chain on worn sprockets will not final lengthy. However, in much less significant situations it might be feasible to preserve the bigger of the 2 sprockets, given that it is constantly the smaller sized 1 that suffers the most put on. Only in quite light-weight-fat purposes these kinds of as a bicycle, or in excessive circumstances of poor rigidity, will the chain usually jump off the sprockets.

The lengthening thanks to put on of a chain is calculated by the subsequent formulation:

M = the size of a number of hyperlinks measured

S = the variety of back links measured

P = Pitch

In market, it is typical to check the movement of the chain tensioner (whether handbook or computerized) or the precise size of a drive chain (one rule of thumb is to replace a roller chain which has elongated 3% on an adjustable generate or 1.5% on a fixed-heart generate). A simpler approach, specifically appropriate for the cycle or motorcycle user, is to endeavor to pull the chain absent from the more substantial of the 2 sprockets, although making certain the chain is taut. Any significant movement (e.g. creating it achievable to see by way of a gap) probably implies a chain worn up to and beyond the limit. Sprocket injury will outcome if the problem is dismissed. Sprocket wear cancels this result, and may mask chain wear.


The most widespread evaluate of roller chain’s energy is tensile strength. Tensile power signifies how a lot load a chain can withstand under a one-time load ahead of breaking. Just as critical as tensile toughness is a chain’s exhaustion toughness. The vital factors in a chain’s fatigue power is the top quality of metal employed to CZPT the chain, the heat remedy of the chain parts, the high quality of the pitch hole fabrication of the linkplates, and the sort of shot plus the intensity of shot peen protection on the linkplates. Other aspects can include the thickness of the linkplates and the layout (contour) of the linkplates. The rule of thumb for roller chain functioning on a continuous travel is for the chain load to not CZPT a mere 1/6 or 1/9 of the chain’s tensile energy, relying on the kind of grasp hyperlinks employed (press-fit vs. slip-match)[citation needed]. Roller chains running on a continuous drive beyond these thresholds can and typically do fall short prematurely by way of linkplate exhaustion failure.

The common minimal final strength of the ANSI 29.1 metal chain is 12,five hundred x (pitch, in inches)2. X-ring and O-Ring chains greatly lower use by means of inside lubricants, escalating chain life. The inner lubrication is inserted by signifies of a vacuum when riveting the chain collectively.


Expectations businesses (such as ANSI and ISO) sustain standards for layout, dimensions, and interchangeability of transmission chains. For illustration, the subsequent Desk demonstrates knowledge from ANSI common B29.1-2011 (Precision Electricity Transmission Roller Chains, Attachments, and Sprockets) produced by the American Modern society of Mechanical Engineers (ASME). See the references[8][9][10] for additional info.

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

ASME/ANSI B29.1-2011 Roller Chain Regular Sizes
Size Pitch Optimum Roller Diameter Minimum Ultimate Tensile Energy Measuring Load
twenty five .250 in (6.35 mm) .one hundred thirty in (3.thirty mm) 780 lb (350 kg) eighteen lb (8.2 kg)
35 .375 in (9.fifty three mm) .two hundred in (5.08 mm) one,760 lb (800 kg) 18 lb (8.2 kg)
forty one .five hundred in (12.70 mm) .306 in (7.seventy seven mm) one,500 lb (680 kg) 18 lb (8.2 kg)
forty .five hundred in (twelve.70 mm) .312 in (7.92 mm) three,125 lb (1,417 kg) 31 lb (14 kg)
fifty .625 in (15.88 mm) .four hundred in (10.16 mm) four,880 lb (2,210 kg) 49 lb (22 kg)
60 .750 in (19.05 mm) .469 in (eleven.91 mm) seven,030 lb (3,190 kg) 70 lb (32 kg)
eighty 1.000 in (twenty five.forty mm) .625 in (fifteen.88 mm) twelve,500 lb (5,seven hundred kg) one hundred twenty five lb (fifty seven kg)
a hundred one.250 in (31.seventy five mm) .750 in (19.05 mm) 19,531 lb (8,859 kg) 195 lb (88 kg)
120 1.five hundred in (38.10 mm) .875 in (22.23 mm) 28,one hundred twenty five lb (twelve,757 kg) 281 lb (127 kg)
one hundred forty 1.750 in (44.forty five mm) one.000 in (twenty five.40 mm) 38,280 lb (seventeen,360 kg) 383 lb (174 kg)
160 2.000 in (50.eighty mm) hundred twenty five in (28.58 mm) 50,000 lb (23,000 kg) five hundred lb (230 kg)
a hundred and eighty 2.250 in (57.fifteen mm) one.460 in (37.08 mm) sixty three,280 lb (28,seven hundred kg) 633 lb (287 kg)
200 2.five hundred in (sixty three.fifty mm) 1.562 in (39.67 mm) seventy eight,a hundred seventy five lb (35,460 kg) 781 lb (354 kg)
240 3.000 in (seventy six.20 mm) 1.875 in (forty seven.sixty three mm) 112,five hundred lb (fifty one,000 kg) one,000 lb (450 kg

For mnemonic purposes, beneath is one more presentation of important dimensions from the very same regular, expressed in fractions of an inch (which was element of the contemplating driving the choice of desired figures in the ANSI normal):

Pitch (inches) Pitch expressed
in eighths
ANSI normal
chain variety
Width (inches)
1four 28 2five oneeight
38 three8 3five 3sixteen
onetwo 48 41 one4
onetwo 48 four five16
fiveeight 5eight five 3eight
threefour six8 6 onetwo
one 88 8 58

one. The pitch is the distance among roller centers. The width is the length between the url plates (i.e. somewhat far more than the roller width to let for clearance).
two. The appropriate-hand digit of the normal denotes 0 = typical chain, 1 = light-weight chain, 5 = rollerless bushing chain.
3. The remaining-hand digit denotes the amount of eighths of an inch that make up the pitch.
four. An “H” pursuing the normal amount denotes heavyweight chain. A hyphenated quantity following the normal amount denotes double-strand (2), triple-strand (3), and so on. As a result 60H-3 denotes quantity 60 heavyweight triple-strand chain.
 A standard bicycle chain (for derailleur gears) employs slender 1⁄2-inch-pitch chain. The width of the chain is variable, and does not impact the load ability. The a lot more sprockets at the rear wheel (traditionally 3-6, nowadays 7-twelve sprockets), the narrower the chain. Chains are offered according to the quantity of speeds they are developed to operate with, for instance, “ten pace chain”. Hub gear or single speed bicycles use 1/2″ x 1/8″ chains, exactly where 1/8″ refers to the greatest thickness of a sprocket that can be utilized with the chain.

Typically chains with parallel shaped back links have an even number of backlinks, with every single slender hyperlink followed by a broad 1.Chains constructed up with a uniform kind of url, slim at 1 and broad at the other conclude, can be manufactured with an odd variety of back links, which can be an benefit to adapt to a special chainwheel-distance on the other facet such a chain tends to be not so sturdy.

Roller chains made using ISO standard are occasionally known as as isochains.


WHY Choose US 

1. Trustworthy High quality Assurance Method
two. Reducing-Edge Personal computer-Managed CNC Equipment
3. Bespoke Answers from Extremely Experienced Experts
4. Customization and OEM Offered for Distinct Application
5. In depth Stock of Spare Parts and Equipment
6. Well-Designed Around the world Marketing and advertising Network
seven. Successful Soon after-Sale Service Method


The 219 sets of superior automatic manufacturing gear provide ensures for large item high quality. The 167 engineers and specialists with senior skilled titles can layout and produce goods to satisfy the precise demands of customers, and OEM customizations are also accessible with us. Our sound world-wide service community can give customers with timely right after-product sales complex services.

We are not just a maker and supplier, but also an sector expert. We perform pro-actively with you to provide expert guidance and item tips in buy to stop up with a most cost effective solution obtainable for your specific software. The clients we provide around the world range from conclude customers to distributors and OEMs. Our OEM replacements can be substituted wherever needed and suitable for equally restore and new assemblies.




Right here are some rewards of chain drives more than belt and gear drives: They can be used for long and brief distances. Numerous axles, are driven by chains. They are compact and have a tiny all round dimensions, so even in the celebration of a hearth, you is not going to knowledge any negative issues. Temperature and ambient problems do not influence its operation. Chain drives do not need preliminary pressure. They are extremely efficient (up to 96%) and have no slip and creep for the duration of transmission, making certain a excellent gear ratio. Chain drive, effortless to set up. Chain drives are lower maintenance, stand up to abrasive conditions and operate in soaked conditions
Whether you are developing from scratch or updating an existing task, obtaining the correct dimensions for your roller chain is a vital 1st choice. To precisely measure a roller chain, you require to know the general width, diameter, and width of the rollers, plate thickness, and height.

China Good quality 12b-1 B Sequence Brief Pitch Precision Simplex Roller Chains and Bush Chains     close to me provider