Roller Chain Size Chart

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

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

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

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