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Roller Chain Dimension Charts & How To Measure Roller Chain

We've put together an easy-to-use roller chain size charts for all ANSI standard size chains. There are 4 charts listed below that cover single, double, triple & quadruple row ANSI roller chain dimensions.

The 3 most important dimensions to measure first is the chain Pitch (P), Roller Diameter (d1) & Inner Width (b1). After this, you can compare the remaining dimensions to verify the chain size you may have.

Dimensions Not Matching?

If the dimensions are not matching, then its likely that you have a Heavy Duty Roller Chain, Metric Roller Chain or a Non-Standard Roller Chain.

Single Standard ANSI Roller Chain Chart

single strand roller chain diagram

Dimensions: Inches

Nitro Chain Number Pitch Roller Width Roller Diameter Overall Width Pin Diameter Plate Height Plate Thickness Buy 10ft Rolls Buy 50ft Rolls Buy 100ft Rolls
- P b1 d1 L d2 h2 T - - -
25-1* 1/4 1/8 0.130 0.311 0.091 0.228 0.030 Buy Now Buy Now Buy Now
35-1* 3/8 3/16 0.200 0.488 0.141 0.346 0.050 Buy Now Buy Now Buy Now
40-1 1/2 5/16 0.312 0.653 0.156 0.469 0.060 Buy Now Buy Now Buy Now
41-1 1/2 1/4 0.306 0.541 0.141 0.390 0.050 Buy Now Buy Now Buy Now
50-1 5/8 3/8 0.400 0.815 0.200 0.585 0.080 Buy Now Buy Now Buy Now
60-1 3/4 1/2 0.469 1.020 0.234 0.709 0.094 Buy Now Buy Now Buy Now
80-1 1 5/8 0.625 1.287 0.312 0.949 0.125 Buy Now Buy Now Buy Now
100-1 1-1/4 3/4 0.750 1.590 0.375 1.188 0.156 Buy Now Contact Us Contact Us
120-1 1-1/2 1 0.875 1.980 0.437 1.425 0.187 Buy Now Contact Us Contact Us
140-1 1-3/4 1 1.000 2.141 0.500 1.663 0.219 Buy Now Contact Us Contact Us
160-1 2 1-1/4 1.125 2.551 0.562 1.889 0.250 Buy Now Contact Us Contact Us
180-1 2-1/4 1-13/32 1.406 2.866 0.687 2.047 0.281 Buy Now Contact Us Contact Us
200-1 2-1/2 1-1/2 1.562 3.161 0.781 2.375 0.312 Buy Now Contact Us Contact Us
240-1 3 1-7/8 1.875 3.760 0.937 2.791 0.375 Buy Now Contact Us Contact Us

* Rollerless chain. d1 = Bushing diameter

Double Standard ANSI Roller Chain Chart

double strand roller chain diagram

Dimensions: Inches

Nitro Chain Number Pitch Roller Width Roller Diameter Overall Width Pin Diameter Plate Height Plate Thickness Buy 10ft Rolls Buy 50ft Rolls
- P b1 d1 L d2 h2 T - -
35-2* 3/8 3/16 0.200 0.885 0.141 0.346 0.050 Buy Now Buy Now
40-2 1/2 5/16 0.312 1.220 0.156 0.469 0.060 Buy Now Buy Now
50-2 5/8 3/8 0.400 1.531 0.200 0.585 0.080 Buy Now Buy Now
60-2 3/4 1/2 0.469 1.921 0.234 0.709 0.094 Buy Now Buy Now
80-2 1 5/8 0.625 2.468 0.312 0.949 0.125 Buy Now Contact Us
100-2 1-1/4 3/4 0.750 3.007 0.375 1.188 0.156 Buy Now Contact Us
120-2 1-1/2 1 0.875 3.772 0.437 1.425 0.187 Buy Now Contact Us
140-2 1-3/4 1 1.000 4.067 0.500 1.663 0.219 Buy Now Contact Us
160-2 2 1-1/4 1.125 4.854 0.562 1.889 0.250 Buy Now Contact Us
180-2 2-1/4 1-13/32 1.406 5.457 0.687 2.047 0.281 Contact Us Contact Us
200-2 2-1/2 1-1/2 1.562 5.980 0.781 2.375 0.312 Buy Now Contact Us
240-2 3 1-7/8 1.875 7.220 0.937 2.791 0.375 Contact Us Contact Us

* Rollerless chain. d1 = Bushing diameter

Triple Standard ANSI Roller Chain Chart

triple strand roller chain diagram

Dimensions: Inches

Nitro Chain Number Pitch Roller Width Roller Diameter Overall Width Pin Diameter Plate Height Plate Thickness Buy 10ft Rolls
- P b1 d1 L d2 h2 T -
25-3* 1/4 1/8 0.130 0.827 0.091 0.228 0.030 Contact Us
35-3* 3/8 3/16 0.200 1.287 0.141 0.346 0.050 Contact Us
40-3 1/2 5/16 0.312 1.787 0.156 0.469 0.060 Buy Now
50-3 5/8 3/8 0.400 2.244 0.200 0.585 0.080 Buy Now
60-3 3/4 1/2 0.469 2.815 0.234 0.709 0.094 Buy Now
80-3 1 5/8 0.625 3.610 0.312 0.949 0.125 Buy Now
100-3 1-1/4 3/4 0.750 4.417 0.375 1.188 0.156 Contact Us
120-3 1-1/2 1 0.875 5.567 0.437 1.425 0.187 Contact Us
140-3 1-3/4 1 1.000 5.992 0.500 1.663 0.219 Contact Us
160-3 2 1-1/4 1.125 7.157 0.562 1.889 0.250 Contact Us
180-3 2-1/4 1-13/32 1.406 8.047 0.687 2.047 0.281 Contact Us
200-3 2-1/2 1-1/2 1.562 8.800 0.781 2.375 0.312 Buy Now
240-3 3 1-7/8 1.875 10.681 0.937 2.791 0.375 Buy Now

* Rollerless chain. d1 = Bushing diameter