Roller Chain Size Chart report
USA 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.
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.
ASME/ANSI Roller Chain Standard Sizes
| Chain No. | Pitch | Roller Diameter | Roller Width | Plate thickness | Pin Diameter | Avg. Ultimate Strength |
|---|---|---|---|---|---|---|
| 25 | 0.250" (6.35 mm) | 0.130" (3.30 mm) | 1/8" | 0.029" | 0.091" | 930 LBS |
| 35 | 0.375" (9.53 mm) | 0.200" (5.08 mm) | 3/16" | 0.050" | 0.141" | 2320 LBS |
| 40 | 0.500" (12.70 mm) | 0.306" (7.77 mm) | 5/16" | 0.058" | 0.156" | 3970 lbs |
| 41 | 0.500" (12.70 mm) | 0.312" (7.92 mm) | 1/4" | 0.050" | 0.141" | 2760 lbs |
| 50 | 0.625" (15.88 mm) | 0.400" (10.16 mm) | 3/8" | 0.079" | 0.200" | 6620 lbs |
| 60 | 0.750" (19.05 mm) | 0.469" (11.91 mm) | 1/2" | 0.093" | 0.234" | 9270 lbs |
| 80 | 1.000" (25.40 mm) | 0.625" (15.88 mm) | 5/8" | 0.125" | 0.312" | 16540 lbs |
| 100 | 1.250" (31.75 mm) | 0.750" (19.05 mm) | 3/4" | 0.157" | 0.375" | 25360 lbs |
| 120 | 1.500" (38.1 mm) | 0.875" (22.225 mm) | 1" | 0.189" | 0.437" | 32640 lbs |
| 140 | 1.750" (44.45 mm) | 1.000" (25.4 mm) | 1" | 0.219" | 0.500" | 45210 lbs |
| 160 | 2.000" (50.8 mm) | 1.125" (28.57 mm) | 1 1/4" | 0.255" | 0.563" | 57780 lbs |
| 180 | 2.250" (57.15 mm) | 1.406" (35.72 mm) | 1.406" | 0.283" | 0.687" | 80480 lbs |
| Pitch (inches) | Pitch expressed in eighths | ANSI standard chain number | Width (inches) |
|---|---|---|---|
| 1/4 | 2/8 | 25 | 1/8 |
| 3/8 | 3/8 | 35 | 3/16 |
| 1/2 | 4/8 | 41 | 1/4 |
| 1/2 | 4/8 | 40 | 5/16 |
| 5/8 | 5/8 | 50 | 3/8 |
| 3/4 | 6/8 | 60 | 1/2 |
| 1 | 8/8 | 80 | 5/8 |
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.
