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Metric Roller Chain Size Chart

Metric Roller Chain Size Charts - Complete Chain Dimensions

We've put together metric roller chain size charts to help you easily identify your chain size. The three charts below list complete chain dimensions for single, double & triple metric roller chains.

Quick Tip: The 3 most important dimensions to measure first is the Pitch (P), Roller Diameter (d1) & Inner Width (b1).

Anything labeled special order is available on a per quote basis for resellers & OEM's - Larger MOQ are required. Contact Us for a quote.

Single Metric Roller Chain

single metric roller chain diagram

Dimensions: Inches (Millimeters)

Chain Number Pitch Roller Diameter Inner Width Pin Diameter Link Plate Height Plate Thickness Overall Width Buy 10ft Rolls Buy 50ft Reels
# 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)		 Buy Now Special Order
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)		 Buy Now Sepcial Order
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)		 Buy Now Buy Now
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)		 Buy Now Buy Now
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)		 Buy Now Buy Now
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)		 Buy Now Buy Now
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)		 Buy Now Special Order
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)		 Buy Now -
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)		 Buy Now -
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)		 Special Order -
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)		 Buy Now -

*Uses straight side plates.

Special orders require larger MOQ's

Double Row Metric Roller Chain

double metric chain diagram

Dimensions: Inches (Millimeters)

Chain Number Pitch Roller Diameter Inner Width Pin Diameter Link Plate Height Plate Thickness Overall Width Buy 10ft Rolls Buy 50ft Reels
# 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)		 Special Order Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now -
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)		 Buy Now -
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)		 Special Order -
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)		 Special Order -

*Uses straight side plates.

Special orders require larger MOQ's

Triple Row Metric Roller Chain

double metric chain diagram

Dimensions: Inches (Millimeters)

Chain Number Pitch Roller Diameter Inner Width Pin Diameter Link Plate Height Plate Thickness Overall Width Buy 10ft Rolls Buy 50ft Reels
# 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)		 Special Order Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Buy Now Special Order
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)		 Special Order Special Order
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)		 Special Order -
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)		 Special Order -
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)		 Special Order -
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)		 Special Order -

*Uses straight side plates.