Roller Chain Size Chart report

Roller chainUSA roller chains and sprockets are one of the nation's largest roller chain suppliers and industrial PT components. You can find our roller chains worldwide in different applications such as food, beverage, conveyors, drive units, oil, and many more.

Identifying your roller chain can be difficult; the specific size chart will help you determine what you need. It may be challenging to buy a replacement roller chain if you don't know the standard size in the ANSI or ISO standards or the exact roller chain dimensions, such as overall width, roller width and diameter, and plate height and thickness.

The core function of a roller chain is to transfer energy from one point to another to the highest degree. Here we have put some of the most asked for roller chain configurations and sizes to steer your search for the roller chain that matches your specific needs in the right direction.

Chain Construction

Chains have a surprising number of parts. The roller turns freely on the bushing, attached on each end to the inner plate. A pin passes through the bushing and is attached to the outer plate at each end. Bicycle chains omit the bushing instead of using the circular ridge formed around the pinhole of the inner plate.

Chain Construction
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Roller Chain Size Chart

Standards organizations (such as ANSI and ISO) maintain transmission chains' design, dimensions, and interchangeability. The following size chart shows data from the ANSI standard developed by the American Society of Mechanical Engineers (ASME).

The roller chain size charts below will help ensure you purchase the chain that suits your machinery best and provides the strength or load carrying capacity required by your specific manufacturing process. But keep in mind that roller chain sizes and standards vary drastically from industry to industry and from one type of equipment to another.

  • The pitch is the distance between roller centers. The width is the distance between the link plates.
  • The right-hand digit of the standard denotes 0 = normal chain, 1 = lightweight chain, 5 = rollerless bushing chain.
  • An "H" following the standard number denotes a heavyweight chain. A hyphenated number following the standard number denotes double-strand (2), triple-strand (3), and so on.

chain

ASME/ANSI Roller Chain Standard Sizes

Chain No.PitchRoller DiameterRoller WidthPlate thicknessPin DiameterAvg. Ultimate Strength
250.250" (6.35 mm)
0.130" (3.30 mm)
1/8"
0.029"
0.091"
930 LBS
350.375" (9.53 mm)
0.200" (5.08 mm)
3/16"
0.050"
0.141"
2320 LBS
400.500" (12.70 mm)
0.306" (7.77 mm)
5/16"
0.058"
0.156"
3970 lbs
410.500" (12.70 mm)
0.312" (7.92 mm)
1/4"
0.050"
0.141"
2760 lbs
500.625" (15.88 mm)
0.400" (10.16 mm)
3/8"
0.079"
0.200"
6620 lbs
600.750" (19.05 mm)
0.469" (11.91 mm)
1/2"
0.093"
0.234"
9270 lbs
801.000" (25.40 mm)
0.625" (15.88 mm)
5/8"
0.125"
0.312"
16540 lbs
1001.250" (31.75 mm)
0.750" (19.05 mm)
3/4"
0.157"
0.375"
25360 lbs
1201.500" (38.1 mm)
0.875" (22.225 mm)
1"
0.189"
0.437"
32640 lbs
1401.750" (44.45 mm)
1.000" (25.4 mm)
1"
0.219"
0.500"
45210 lbs
1602.000" (50.8 mm)
1.125" (28.57 mm)
1 1/4"
0.255"
0.563"
57780 lbs
1802.250" (57.15 mm)
1.406" (35.72 mm)
1.406"
0.283"
0.687"
80480 lbs
Pitch (inches)Pitch expressed in eighthsANSI standard chain numberWidth (inches)
1/42/8251/8
3/83/8353/16
1/24/8411/4
1/24/8
405/16
5/85/8503/8
3/46/8601/2
18/8805/8

Whether you are building something from scratch or making an update to an existing project, finding the right size for your roller chain is a critical first decision. To accurately measure the roller chain, you will need to know the roller's overall width, diameter and width, plate thickness, and height.


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