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Roller Chain Size Charts & Measurement Guide

Roller chains have powered industrial, agricultural, and material handling equipment for decades thanks to their strength, reliability, and versatility. Today, roller chains are available in a wide range of sizes and configurations to match virtually any application.

Whether you’re working with ANSI standard roller chains, heavy duty chains, metric roller chains, agricultural chains, conveyor chains, or non-standard chains, our comprehensive roller chain size charts make it easy to identify the correct chain for your application.

How to Measure Roller Chain to Identify the Correct Size

Identifying your roller chain size is straightforward when you know what to measure. To get started, download and print our roller chain measurement template (PDF) and record the dimensions of your existing chain.

When comparing your measurements to the size charts below, focus on these three critical dimensions:

  • Pitch (P) – distance between pin centers
  • Inner Width (b1) – spacing between inner plates
  • Roller Diameter (d1) – outside diameter of the roller

Once you’ve narrowed down a potential chain size, always verify the remaining specifications to ensure proper fit, strength, and performance.

ANSI Standard Roller Chain Size Charts

Single Strand Chart
single strand roller chain diagram
Dimensions: Inches
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
double strand roller chain diagram
Dimensions: Inches
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
triple strand roller chain diagram
Dimensions: Inches
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
quadruple strand roller chain diagram
Dimensions: Inches
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 Series Roller Chain Size Charts

Single Strand Chart
heavy duty single roller chain diagram
Dimensions: Inches
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
heavy duty double strand roller chain diagram
Dimensions: Inches
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
heavy duty triple strand roller chain diagram
Dimensions: Inches
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
single metric roller chain diagram
Dimensions: Inches (Millimeters)
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
double metric chain diagram
Dimensions: Inches (Millimeters)
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
triple metric chain diagram
Dimensions: Inches (Millimeters)
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
conveyor roller chain diagram
Dimensions: Inches
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
Dimensions: Inches
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

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