Roller Chain Dimensions Table
Roller chain is a series of alternately assembled roller links and pin links in which the pins articulate inside the bushings and the rollers are free to turn on the bushings. Below you can find the ANSI standard roller chain dimensions, including pitch, roller diameter, chain width, pin diameter, and minimum tensile strength.
General Roller Chain Dimensions (inches)
ANSI Standard Roller Chain Dimensions
Std.
Chain
No.
|
Pitch
P
|
Max.
Roller
Dia.
Dr
|
Nom.
Chain
Width
W
|
Nom.
Pin
Dia.
Dp
|
Link Plate
Thickness
LPT
|
Length
Tolerance
in/ft
|
Measuring
Load
(lb)
|
M.U.T.S
(lb)
|
Min. Dynamic
Strength
Std. Series
(lb)
|
Min. Dynamic
Strength
Heavy Series
(lb)
|
|
Std. Series
|
Heavy Series
|
| 25 | 0.250 | 0.130 | 0.125 | 0.0905 | 0.030 | 0.031 | 0.031 | 18 | 780 | 140 | — |
| 35 | 0.375 | 0.200 | 0.188 | 0.141 | 0.050 | — | 0.022 | 18 | 1760 | 320 | — |
| 41 | 0.500 | 0.306 | 0.250 | 0.141 | 0.050 | — | 0.019 | 18 | 1500 | 305 | — |
| 40 | 0.500 | 0.312 | 0.312 | 0.156 | 0.060 | — | 0.019 | 31 | 3125 | 560 | — |
| 50 | 0.625 | 0.400 | 0.375 | 0.200 | 0.080 | — | 0.018 | 49 | 4880 | 870 | — |
| 60 | 0.750 | 0.469 | 0.500 | 0.234 | 0.094 | 0.125 | 0.017 | 70 | 7030 | 1230 | 1420 |
| 80 | 1.000 | 0.625 | 0.625 | 0.312 | 0.125 | 0.156 | 0.016 | 125 | 12500 | 2150 | 2400 |
| 100 | 1.250 | 0.750 | 0.750 | 0.375 | 0.156 | 0.187 | 0.016 | 195 | 19530 | 3280 | 3590 |
| 120 | 1.500 | 0.875 | 1.000 | 0.437 | 0.187 | 0.219 | 0.015 | 281 | 28125 | 4620 | 5000 |
| 140 | 1.750 | 1.000 | 1.000 | 0.500 | 0.219 | 0.250 | 0.015 | 383 | 38280 | 6140 | 6560 |
| 160 | 2.000 | 1.125 | 1.250 | 0.562 | 0.250 | 0.281 | 0.015 | 500 | 50000 | 7820 | 8290 |
| 180 | 2.250 | 1.406 | 1.406 | 0.687 | 0.281 | 0.312 | 0.015 | 633 | 63280 | 9650 | 10200 |
| 200 | 2.500 | 1.562 | 1.500 | 0.781 | 0.312 | 0.375 | 0.015 | 781 | 78125 | 11600 | 12700 |
| 240 | 3.000 | 1.875 | 1.875 | 0.937 | 0.375 | 0.500 | 0.015 | 1000 | 112500 | 15800 | 18300 |
Notes:
Dr is the bushing diameter for chain 25 and chain 35 as these chains have no rollers.
Minimum Ultimate Tensile Strength (M.U.T.S) is the minimum force at which an unused, undamaged chain could fail when subjected to a single tensile loading test.
Measuring load is the load under which the chain is measured for length. Values given are for single strand chain.
Related Resources:
Reference:
- ASME B29.1-2011 - Precision Power Transmission Roller Chains, Attachments, and Sprockets