Roller chain has been around for a long time and has evolved into a broad range of styles & sizes. The roller chain size charts below cover ANSI, Heavy Duty, Metric, Agricultural, Conveyor & Non-Standard chains. Many roller chains are available in multi-strands and we've included charts to cover single strand thru quadruple strand. Each chart includes complete roller chain dimensions with easy-to-read diagrams with reference points.
How To Measure Roller Chain To Identify Size
Measuring roller chain to determine the chain size is quite simple. To start you can download & print a pdf chain template to record the chain dimensions that you measure. After you have obtained all the measurements, you'll be able to compare those dimensions to the chain size charts provided below. The three main measurements to look at when comparing are the pitch (P), inner width (b1) & the roller diameter (d1). When you've narrowed down to a size, we recommend that you verify all the remaining specifications.
ANSI Standard Roller Chain Size Charts
Single Strand Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 25-1* | 1/4 | 1/8 | 0.130 | 0.311 | 0.091 | 0.228 | 0.030 |
| 35-1* | 3/8 | 3/16 | 0.200 | 0.488 | 0.141 | 0.346 | 0.050 |
| 40-1 | 1/2 | 5/16 | 0.312 | 0.653 | 0.156 | 0.469 | 0.060 |
| 41-1 | 1/2 | 1/4 | 0.306 | 0.541 | 0.141 | 0.390 | 0.050 |
| 50-1 | 5/8 | 3/8 | 0.400 | 0.815 | 0.200 | 0.585 | 0.080 |
| 60-1 | 3/4 | 1/2 | 0.469 | 1.020 | 0.234 | 0.709 | 0.094 |
| 80-1 | 1 | 5/8 | 0.625 | 1.287 | 0.312 | 0.949 | 0.125 |
| 100-1 | 1-1/4 | 3/4 | 0.750 | 1.590 | 0.375 | 1.188 | 0.156 |
| 120-1 | 1-1/2 | 1 | 0.875 | 1.980 | 0.437 | 1.425 | 0.187 |
| 140-1 | 1-3/4 | 1 | 1.000 | 2.141 | 0.500 | 1.663 | 0.219 |
| 160-1 | 2 | 1-1/4 | 1.125 | 2.551 | 0.562 | 1.889 | 0.250 |
| 180-1 | 2-1/4 | 1-13/32 | 1.406 | 2.866 | 0.687 | 2.047 | 0.281 |
| 200-1 | 2-1/2 | 1-1/2 | 1.562 | 3.161 | 0.781 | 2.375 | 0.312 |
| 240-1 | 3 | 1-7/8 | 1.875 | 3.760 | 0.937 | 2.791 | 0.375 |
* Rollerless chain. d1 = Bushing diameter
Double Strand Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 35-2* | 3/8 | 3/16 | 0.200 | 0.885 | 0.141 | 0.346 | 0.050 |
| 40-2 | 1/2 | 5/16 | 0.312 | 1.220 | 0.156 | 0.469 | 0.060 |
| 50-2 | 5/8 | 3/8 | 0.400 | 1.531 | 0.200 | 0.585 | 0.080 |
| 60-2 | 3/4 | 1/2 | 0.469 | 1.921 | 0.234 | 0.709 | 0.094 |
| 80-2 | 1 | 5/8 | 0.625 | 2.468 | 0.312 | 0.949 | 0.125 |
| 100-2 | 1-1/4 | 3/4 | 0.750 | 3.007 | 0.375 | 1.188 | 0.156 |
| 120-2 | 1-1/2 | 1 | 0.875 | 3.772 | 0.437 | 1.425 | 0.187 |
| 140-2 | 1-3/4 | 1 | 1.000 | 4.067 | 0.500 | 1.663 | 0.219 |
| 160-2 | 2 | 1-1/4 | 1.125 | 4.854 | 0.562 | 1.889 | 0.250 |
| 180-2 | 2-1/4 | 1-13/32 | 1.406 | 5.457 | 0.687 | 2.047 | 0.281 |
| 200-2 | 2-1/2 | 1-1/2 | 1.562 | 5.980 | 0.781 | 2.375 | 0.312 |
| 240-2 | 3 | 1-7/8 | 1.875 | 7.220 | 0.937 | 2.791 | 0.375 |
* Rollerless chain. d1 = Bushing diameter
Triple Strand Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 25-3* | 1/4 | 1/8 | 0.130 | 0.827 | 0.091 | 0.228 | 0.030 |
| 35-3* | 3/8 | 3/16 | 0.200 | 1.287 | 0.141 | 0.346 | 0.050 |
| 40-3 | 1/2 | 5/16 | 0.312 | 1.787 | 0.156 | 0.469 | 0.060 |
| 50-3 | 5/8 | 3/8 | 0.400 | 2.244 | 0.200 | 0.585 | 0.080 |
| 60-3 | 3/4 | 1/2 | 0.469 | 2.815 | 0.234 | 0.709 | 0.094 |
| 80-3 | 1 | 5/8 | 0.625 | 3.610 | 0.312 | 0.949 | 0.125 |
| 100-3 | 1-1/4 | 3/4 | 0.750 | 4.417 | 0.375 | 1.188 | 0.156 |
| 120-3 | 1-1/2 | 1 | 0.875 | 5.567 | 0.437 | 1.425 | 0.187 |
| 140-3 | 1-3/4 | 1 | 1.000 | 5.992 | 0.500 | 1.663 | 0.219 |
| 160-3 | 2 | 1-1/4 | 1.125 | 7.157 | 0.562 | 1.889 | 0.250 |
| 180-3 | 2-1/4 | 1-13/32 | 1.406 | 8.047 | 0.687 | 2.047 | 0.281 |
| 200-3 | 2-1/2 | 1-1/2 | 1.562 | 8.800 | 0.781 | 2.375 | 0.312 |
| 240-3 | 3 | 1-7/8 | 1.875 | 10.681 | 0.937 | 2.791 | 0.375 |
Quadruple Strand Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 40-4 | 1/2 | 5/16 | 0.312 | 1.787 | 0.156 | 0.469 | 0.060 |
| 50-4 | 5/8 | 3/8 | 0.400 | 2.244 | 0.200 | 0.585 | 0.080 |
| 60-4 | 3/4 | 1/2 | 0.469 | 2.815 | 0.234 | 0.709 | 0.094 |
| 80-4 | 1 | 5/8 | 0.625 | 3.610 | 0.312 | 0.949 | 0.125 |
| 100-4 | 1-1/4 | 3/4 | 0.750 | 4.417 | 0.375 | 1.188 | 0.156 |
| 120-4 | 1-1/2 | 1 | 0.875 | 5.567 | 0.437 | 1.425 | 0.187 |
* Rollerless chain. d1 = Bushing diameter
Heavy Duty Roller Chain Size Charts
Single Strand Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 35H-1* | 3/8 | 3/16 | 0.200 | 0.524 | 0.141 | 0.346 | 0.060 |
| 40H-1 | 1/2 | 5/16 | 0.312 | 0.740 | 0.156 | 0.469 | 0.080 |
| 50H-1 | 5/8 | 3/8 | 0.400 | 0.870 | 0.200 | 0.585 | 0.094 |
| 60H-1 | 3/4 | 1/2 | 0.469 | 1.150 | 0.234 | 0.709 | 0.125 |
| 80H-1 | 1 | 5/8 | 0.625 | 1.425 | 0.312 | 0.949 | 0.156 |
| 100H-1 | 1-1/4 | 3/4 | 0.750 | 1.716 | 0.375 | 1.188 | 0.187 |
| 120H-1 | 1-1/2 | 1 | 0.875 | 2.106 | 0.437 | 1.425 | 0.219 |
| 140H-1 | 1-3/4 | 1 | 1.000 | 2.268 | 0.500 | 1.663 | 0.250 |
| 160H-1 | 2 | 1-1/4 | 1.125 | 2.685 | 0.562 | 1.889 | 0.281 |
| 200H-1 | 2-1/2 | 1-1/2 | 1.562 | 3.409 | 0.781 | 2.375 | 0.375 |
| 240H-1 | 3 | 1-7/8 | 1.875 | 4.315 | 0.937 | 2.791 | 0.500 |
* Rollerless chain. d1 = Bushing diameter
Double Strand
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 60H-2 | 3/4 | 1/2 | 0.469 | 2.177 | 0.234 | 0.709 | 0.128 |
| 80H-2 | 1 | 5/8 | 0.625 | 2.708 | 0.312 | 0.949 | 0.156 |
| 100H-2 | 1-1/4 | 3/4 | 0.750 | 3.255 | 0.375 | 1.188 | 0.189 |
| 120H-2 | 1-1/2 | 1 | 0.875 | 3.772 | 0.437 | 1.425 | 0.220 |
| 140H-2 | 1-3/4 | 1 | 1.000 | 4.323 | 0.500 | 1.663 | 0.250 |
| 160H-2 | 2 | 1-1/4 | 1.125 | 5.122 | 0.562 | 1.889 | 0.283 |
| 200H-2 | 2-1/2 | 1-1/2 | 1.562 | 6.492 | 0.781 | 2.375 | 0.375 |
| 240H-2 | 3 | 1-7/8 | 1.875 | 8.370 | 0.937 | 2.791 | 0.500 |
Triple Strand
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| 60H-3 | 3/4 | 1/2 | 0.469 | 3.204 | 0.234 | 0.709 | 0.128 |
| 80H-3 | 1 | 5/8 | 0.625 | 3.992 | 0.312 | 0.949 | 0.156 |
| 100H-3 | 1-1/4 | 3/4 | 0.750 | 4.795 | 0.375 | 1.188 | 0.189 |
| 120H-3 | 1-1/2 | 1 | 0.875 | 5.952 | 0.437 | 1.425 | 0.220 |
| 140H-3 | 1-3/4 | 1 | 1.000 | 6.378 | 0.500 | 1.663 | 0.250 |
| 160H-3 | 2 | 1-1/4 | 1.125 | 7.560 | 0.562 | 1.889 | 0.283 |
| 200H-3 | 2-1/2 | 1-1/2 | 1.562 | 9.574 | 0.781 | 2.375 | 0.375 |
| 240H-3 | 3 | 1-7/8 | 1.875 | 12.354 | 0.937 | 2.791 | 0.500 |
Metric Roller Chain Size Charts
Single Strand Chart
| Chain Number | Pitch | Roller Diameter | Inner Width | Pin Diameter | Link Plate Height | Plate Thickness | Overall Width |
|---|---|---|---|---|---|---|---|
| # | P | d1 | b1 | d2 | h2 | T | L |
| 04B | 0.236 (6mm) |
0.157 (4mm) |
0.110 (2.80mm) |
0.072 (1.85mm) |
0.196 (5mm) |
0.023 (0.60mm) |
0.268 (6.80mm) |
| 05B | 0.315 (8mm) |
0.196 (5mm) |
0.118 (3mm) |
0.090 (2.31mm) |
0.280 (7.10mm) |
0.030 (0.80mm) |
0.322 (8.20mm) |
| 06B* | 3/8 (9.525mm) |
0.250 (6.35mm) |
0.225 (5.72mm) |
0.130 (3.28mm) |
0.335 (8.20mm) |
0.050 (1.30mm) |
0.517 (13.15mm) |
| 08B | 1/2 (12.70mm) |
0.335 (8.51mm) |
0.305 (7.75mm) |
0.175 (4.45mm) |
0.472 (11.80mm) |
0.060 (1.60mm) |
0.657 (16.70mm) |
| 10B | 5/8 (15.875mm) |
0.400 (10.16mm) |
0.380 (9.65mm) |
0.200 (5.08mm) |
0.579 (14.70mm) |
0.065 (1.70mm) |
0.767 (19.50mm) |
| 12B | 3/4 (19.05mm) |
0.475 (12.07mm) |
0.460 (11.68mm) |
0.225 (5.72mm) |
0.637 (16mm) |
0.070 (1.85mm) |
0.885 (22.50mm) |
| 16B | 1 (25.40mm) |
0.625 (15.88mm) |
0.670 (17.02mm) |
0.326 (8.28mm) |
0.827 (21mm) |
0.156 (3.96mm) |
1.421 (36.10mm) |
| 20B | 1-1/4 (31.75mm) |
0.750 (19.05mm) |
0.770 (19.56mm) |
0.401 (10.19mm) |
1.039 (26.40mm) |
0.177 (4.50mm) |
1.626 (41.30mm) |
| 24B | 1-1/2 (38.10mm) |
1.000 (25.40mm) |
1.000 (25.40mm) |
0.576 (14.63mm) |
1.315 (33.20mm) |
0.238 (6.04mm) |
2.102 (53.40mm) |
| 28B | 1-3/4 (44.45mm) |
1.100 (27.94mm) |
1.220 (30.99mm) |
0.625 (15.90mm) |
1.444 (36.70mm) |
0.275 (6.99mm) |
2.563 (65.10mm) |
| 32B | 2 (50.80mm) |
1.150 (29.21mm) |
1.220 (30.99mm) |
0.701 (17.81mm) |
1.661 (42.18mm) |
0.276 (7.01mm) |
2.598 (66mm) |
*Uses straight side plates.
Double Strand Chart
| Chain Number | Pitch | Roller Diameter | Inner Width | Pin Diameter | Link Plate Height | Plate Thickness | Overall Width |
|---|---|---|---|---|---|---|---|
| # | P | d1 | b1 | d2 | h2 | T | L |
| 05B-2 | 0.315 (8mm) |
0.196 (5mm) |
0.118 (3mm) |
0.090 (2.31mm) |
0.280 (7.10mm) |
0.030 (0.80mm) |
0.547 (13.9mm) |
| 06B-2* | 3/8 (9.525mm) |
0.250 (6.35mm) |
0.225 (5.72mm) |
0.130 (3.28mm) |
0.335 (8.20mm) |
0.050 (1.30mm) |
0.921 (23.4mm) |
| 08B-2 | 1/2 (12.70mm) |
0.335 (8.51mm) |
0.305 (7.75mm) |
0.175 (4.45mm) |
0.472 (11.80mm) |
0.060 (1.60mm) |
1.220 (31mm) |
| 10B-2 | 5/8 (15.875mm) |
0.400 (10.16mm) |
0.380 (9.65mm) |
0.200 (5.08mm) |
0.579 (14.70mm) |
0.065 (1.70mm) |
1.421 (36.10mm) |
| 12B-2 | 3/4 (19.05mm) |
0.475 (12.07mm) |
0.460 (11.68mm) |
0.225 (5.72mm) |
0.637 (16mm) |
0.070 (1.85mm) |
1.653 (42mm) |
| 16B-2 | 1 (25.40mm) |
0.625 (15.88mm) |
0.670 (17.02mm) |
0.326 (8.28mm) |
0.827 (21mm) |
0.156 (3.96mm) |
2.677 (68mm) |
| 20B-2 | 1-1/4 (31.75mm) |
0.750 (19.05mm) |
0.770 (19.56mm) |
0.401 (10.19mm) |
1.039 (26.40mm) |
0.177 (4.50mm) |
3.063 (77.8mm) |
| 24B-2 | 1-1/2 (38.10mm) |
1.000 (25.40mm) |
1.000 (25.40mm) |
0.576 (14.63mm) |
1.315 (33.20mm) |
0.238 (6.04mm) |
4.003 (101.7mm) |
| 28B-2 | 1-3/4 (44.45mm) |
1.100 (27.94mm) |
1.220 (30.99mm) |
0.625 (15.90mm) |
1.444 (36.70mm) |
0.275 (6.99mm) |
4.905 (124.6mm) |
| 32B-2 | 2 (50.80mm) |
1.150 (29.21mm) |
1.220 (30.99mm) |
0.701 (17.81mm) |
1.661 (42.18mm) |
0.276 (7.01mm) |
4.905 (124.6mm) |
*Uses straight side plates.
Triple Strand Chart
| Chain Number | Pitch | Roller Diameter | Inner Width | Pin Diameter | Link Plate Height | Plate Thickness | Overall Width |
|---|---|---|---|---|---|---|---|
| # | P | d1 | b1 | d2 | h2 | T | L |
| 05B-3 | 0.315 (8mm) |
0.196 (5mm) |
0.118 (3mm) |
0.090 (2.31mm) |
0.280 (7.10mm) |
0.030 (0.80mm) |
0.767 (19.5mm) |
| 06B-3* | 3/8 (9.525mm) |
0.250 (6.35mm) |
0.225 (5.72mm) |
0.130 (3.28mm) |
0.335 (8.20mm) |
0.050 (1.30mm) |
1.318 (33.5mm) |
| 08B-3 | 1/2 (12.70mm) |
0.335 (8.51mm) |
0.305 (7.75mm) |
0.175 (4.45mm) |
0.472 (11.80mm) |
0.060 (1.60mm) |
1.775 (45.1mm) |
| 10B-3 | 5/8 (15.875mm) |
0.400 (10.16mm) |
0.380 (9.65mm) |
0.200 (5.08mm) |
0.579 (14.70mm) |
0.065 (1.70mm) |
2.074 (52.7mm) |
| 12B-3 | 3/4 (19.05mm) |
0.475 (12.07mm) |
0.460 (11.68mm) |
0.225 (5.72mm) |
0.637 (16mm) |
0.070 (1.85mm) |
2.421 (61.5mm) |
| 16B-3 | 1 (25.40mm) |
0.625 (15.88mm) |
0.670 (17.02mm) |
0.326 (8.28mm) |
0.827 (21mm) |
0.156 (3.96mm) |
3.929 (99.8mm) |
| 20B-3 | 1-1/4 (31.75mm) |
0.750 (19.05mm) |
0.770 (19.56mm) |
0.401 (10.19mm) |
1.039 (26.40mm) |
0.177 (4.50mm) |
4.496 (114.2mm) |
| 24B-3 | 1-1/2 (38.10mm) |
1.000 (25.40mm) |
1.000 (25.40mm) |
0.576 (14.63mm) |
1.315 (33.20mm) |
0.238 (6.04mm) |
5.909 (150.1mm) |
| 28B-3 | 1-3/4 (44.45mm) |
1.100 (27.94mm) |
1.220 (30.99mm) |
0.625 (15.90mm) |
1.444 (36.70mm) |
0.275 (6.99mm) |
7.252 (184.2mm) |
| 32B-3 | 2 (50.80mm) |
1.150 (29.21mm) |
1.220 (30.99mm) |
0.701 (17.81mm) |
1.661 (42.18mm) |
0.276 (7.01mm) |
7.212 (183.2mm) |
*Uses straight side plates.
Conveyor Roller Chain Size Charts
Standard
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| - | P | b1 | d1 | L | d2 | h2 | T |
| C2040 | 1 | 5/16 | 0.312 | 0.653 | 0.156 | 0.469 | 0.060 |
| C2050 | 1-1/4 | 3/8 | 0.400 | 0.815 | 0.200 | 0.585 | 0.080 |
| C2060H | 1-1/2 | 1/2 | 0.469 | 1.150 | 0.234 | 0.709 | 0.125 |
| C2080H | 2 | 5/8 | 0.625 | 1.425 | 0.312 | 0.949 | 0.156 |
| C2100H | 2-1/2 | 3/4 | 0.750 | 1.716 | 0.375 | 1.188 | 0.187 |
| C2120H | 3 | 1 | 0.875 | 2.106 | 0.437 | 1.425 | 0.219 |
| C2160H | 4 | 1-1/4 | 1.125 | 2.685 | 0.562 | 1.889 | 0.281 |
Oversized - Large Roller Chart
| Nitro Chain Number | Pitch | Inner Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| # | P | b1 | d1 | L | d2 | h2 | T |
| C2042 | 1 | 5/16 | 0.625 | 0.653 | 0.156 | 0.469 | 0.060 |
| C2052 | 1-1/4 | 3/8 | 0.750 | 0.815 | 0.200 | 0.585 | 0.080 |
| C2062H | 1-1/2 | 1/2 | 0.875 | 1.150 | 0.234 | 0.709 | 0.125 |
| C2082H | 2 | 5/8 | 1.125 | 1.425 | 0.312 | 0.949 | 0.156 |
| C2102H | 2-1/2 | 3/4 | 1.562 | 1.716 | 0.375 | 1.188 | 0.187 |
| C2122H | 3 | 1 | 1.750 | 2.106 | 0.437 | 1.425 | 0.219 |
Non-Standard Roller Chain Charts
Non Standard Roller Chain Chart
| Nitro Chain Number | Pitch | Roller Width | Roller Diameter | Overall Width | Pin Diameter | Plate Height | Plate Thickness |
|---|---|---|---|---|---|---|---|
| - | P | b1 | d1 | L | d2 | h2 | T |
| 410 (43 & 65) | 1/2 | 1/8 | 0.305 | 0.408 | 0.142 | 0.390 | 0.040 |
| 415 | 1/2 | 3/16 | 0.305 | 0.468 | 0.142 | 0.390 | 0.040 |
| 420 | 1/2 | 1/4 | 0.306 | 0.644 | 0.156 | 0.469 | 0.060 |
| 520 | 5/8 | 1/4 | 0.400 | 0.742 | 0.200 | 0.594 | 0.080 |