
20B Roller Chain Dimensions


Chain Size | Pitch (P) | Roller Width (W) | Roller Diameter (D) | Pin Diameter (E) | Plate Height (H) | C/L Width (A): | Breaking Load | Weight (Per Ft) |
---|---|---|---|---|---|---|---|---|
20B-1 | 31.75mm | 19.56mm | 19.05mm | 10.19mm | 26.4mm | 45.0mm | 106.7 kN | 3.6 kg/m |
- International Organization for Standardization - ISO 606B
- BS 228 British Standard
- DIN 8187 German Standard
Stainless Steel 20B Roller Chain:

Made from a high-quality 304-grade stainless steel 20BSS chain is the most anti-corrosive 20B chain available, for more information on stainless steel chains go to our stainless steel roller chain page.
Nickel Plated 20B Roller Chain:

A nickel plated chain is made with a special plating on each component to create an anti-corrosive barrier on the chain.
Coated 20 B Roller Chain:
The best all around anti-corrosive chain option is to use the coated version. It is coated with a proprietary compound that outlasts nickel plating in almost every application 5+ times.
20B A-Plate Sprockets:

Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Sprocket Weight (kg) |
---|---|---|---|---|
20A8 | 8 | 82.97mm | 25mm | 0.63 |
20A9 | 9 | 92.83mm | 25mm | 0.95 |
20A10 | 10 | 102.75mm | 25mm | 1.27 |
20A11 | 11 | 112.70mm | 25mm | 1.59 |
20A12 | 12 | 122.67mm | 25mm | 1.91 |
20A13 | 13 | 132.67mm | 25mm | 2.18 |
20A14 | 14 | 142.68mm | 25mm | 2.49 |
20A15 | 15 | 152.71mm | 25mm | 2.68 |
20A16 | 16 | 162.75mm | 24mm | 3.08 |
20A17 | 17 | 172.79mm | 24mm | 3.54 |
20A18 | 18 | 182.84mm | 30mm | 3.81 |
20A19 | 19 | 192.90mm | 30mm | 4.31 |
20A20 | 20 | 202.96mm | 30mm | 4.58 |
20A21 | 21 | 213.03mm | 32mm | 5.17 |
20A22 | 22 | 223.10mm | 32mm | 5.72 |
20A23 | 23 | 233.17mm | 32mm | 5.99 |
20A24 | 24 | 243.25mm | 32mm | 6.62 |
20A25 | 25 | 253.32mm | 32mm | 6.94 |
20A26 | 26 | 263.41mm | 32mm | 7.62 |
20A27 | 27 | 273.49mm | 32mm | 8.35 |
20A28 | 28 | 283.57mm | 32mm | 8.85 |
20A29 | 29 | 293.66mm | 32mm | 9.43 |
20A30 | 30 | 303.75mm | 32mm | 9.98 |
20A31 | 31 | 313.83mm | 32mm | 10.73 |
20A32 | 32 | 323.92mm | 32mm | 11.49 |
20A33 | 33 | 334.01mm | 32mm | 12.24 |
20A34 | 34 | 344.10mm | 32mm | 13.00 |
20A35 | 35 | 354.20mm | 32mm | 13.75 |
20A36 | 36 | 364.29mm | 32mm | 14.50 |
20A37 | 37 | 374.38mm | 32mm | 15.25 |
20A38 | 38 | 384.48mm | 32mm | 16.01 |
20A39 | 39 | 394.57mm | 32mm | 16.76 |
20A40 | 40 | 404.67mm | 32mm | 17.52 |
20A41 | 41 | 414.77mm | 32mm | 18.27 |
20A42 | 42 | 424.88mm | 32mm | 19.03 |
20A43 | 43 | 434.96mm | 32mm | 19.78 |
20A44 | 44 | 445.06mm | 32mm | 20.53 |
20A45 | 45 | 455.15mm | 32mm | 21.29 |
20A46 | 46 | 465.25mm | 32mm | 22.04 |
20A47 | 47 | 475.35mm | 32mm | 22.79 |
20A48 | 48 | 485.45mm | 32mm | 23.55 |
20A49 | 49 | 495.55mm | 32mm | 24.30 |
20A50 | 50 | 505.65mm | 32mm | 25.06 |
20A51 | 51 | 515.75mm | 40mm | 24.43 |
20A52 | 52 | 525.85mm | 40mm | 25.85 |
20A53 | 53 | 535.95mm | 40mm | 27.27 |
20A54 | 54 | 546.05mm | 40mm | 25.70 |
20A55 | 55 | 556.15mm | 40mm | 30.12 |
20A56 | 56 | 566.25mm | 40mm | 31.34 |
20A57 | 57 | 576.35mm | 40mm | 32.96 |
20A58 | 58 | 586.45mm | 40mm | 35.80 |
20A59 | 59 | 596.56mm | 40mm | 37.22 |
20A60 | 60 | 606.66mm | 40mm | 38.64 |
20A70 | 70 | 707.68mm | 40mm | 52.85 |
20A72 | 72 | 727.89mm | 40mm | 55.70 |
20A76 | 76 | 768.30mm | 40mm | 61.38 |
20A80 | 80 | 808.71mm | 40mm | 67.06 |
20A84 | 84 | 849.13mm | 40mm | 72.75 |
20A90 | 90 | 909.76mm | 40mm | 81.27 |
20A95 | 95 | 960.28mm | 40mm | 102.42 |
20A96 | 96 | 970.38mm | 40mm | 103.84 |
20A114 | 114 | 1152.27mm | 40mm | 130.84 |

Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Maximum Bore | Hub Diameter | Length Thru Bore (LTB) | Sprocket Weight (kg) |
---|---|---|---|---|---|---|---|
20B8 | 8 | 82.97mm | 25mm | 57mm | 48mm | 48mm | 1.04 |
20B9 | 9 | 92.83mm | 25mm | 57mm | 58mm | 48mm | 1.45 |
20B10 | 10 | 102.75mm | 25mm | 60mm | 69mm | 48mm | 1.86 |
20B11 | 11 | 112.70mm | 25mm | 70mm | 79mm | 48mm | 2.40 |
20B12 | 12 | 122.67mm | 25mm | 76mm | 90mm | 48mm | 2.95 |
20B13 | 13 | 132.67mm | 25mm | 76mm | 98mm | 41mm | 3.00 |
20B14 | 14 | 142.68mm | 25mm | 76mm | 106mm | 41mm | 3.40 |
20B15 | 15 | 152.71mm | 25mm | 76mm | 114mm | 44mm | 4.31 |
20B16 | 16 | 162.75mm | 25mm | 76mm | 114mm | 44mm | 4.63 |
20B17 | 17 | 172.79mm | 32mm | 76mm | 114mm | 44mm | 4.99 |
20B18 | 18 | 182.84mm | 32mm | 76mm | 114mm | 44mm | 5.44 |
20B19 | 19 | 192.90mm | 32mm | 76mm | 114mm | 51mm | 5.90 |
20B20 | 20 | 202.96mm | 32mm | 76mm | 114mm | 51mm | 6.35 |
20B21 | 21 | 213.03mm | 32mm | 76mm | 114mm | 51mm | 7.03 |
20B22 | 22 | 223.10mm | 32mm | 76mm | 114mm | 51mm | 7.71 |
20B23 | 23 | 233.17mm | 32mm | 84mm | 114mm | 51mm | 8.16 |
20B24 | 24 | 243.25mm | 32mm | 84mm | 114mm | 51mm | 8.62 |
20B25 | 25 | 253.32mm | 32mm | 84mm | 114mm | 51mm | 9.07 |
20B26 | 26 | 263.41mm | 32mm | 84mm | 127mm | 51mm | 9.53 |
20B27 | 27 | 273.49mm | 32mm | 84mm | 127mm | 51mm | 10.43 |
20B28 | 28 | 283.57mm | 32mm | 84mm | 127mm | 51mm | 11.34 |
20B29 | 29 | 293.66mm | 32mm | 84mm | 127mm | 51mm | 11.76 |
20B30 | 30 | 303.75mm | 32mm | 84mm | 127mm | 51mm | 12.02 |
20B31 | 31 | 313.83mm | 32mm | 84mm | 127mm | 51mm | 12.77 |
20B32 | 32 | 323.92mm | 32mm | 84mm | 127mm | 51mm | 13.52 |
20B33 | 33 | 334.01mm | 32mm | 84mm | 127mm | 51mm | 14.59 |
20B34 | 34 | 344.10mm | 32mm | 84mm | 127mm | 51mm | 15.66 |
20B35 | 35 | 354.20mm | 32mm | 84mm | 127mm | 64mm | 16.74 |
20B36 | 36 | 364.29mm | 32mm | 84mm | 127mm | 64mm | 17.51 |
20B37 | 37 | 374.38mm | 32mm | 84mm | 127mm | 64mm | 18.17 |
20B38 | 38 | 384.48mm | 32mm | 84mm | 127mm | 64mm | 18.82 |
20B39 | 39 | 394.57mm | 32mm | 84mm | 127mm | 64mm | 19.78 |
20B40 | 40 | 404.67mm | 32mm | 84mm | 127mm | 64mm | 21.27 |
20B41 | 41 | 414.77mm | 32mm | 84mm | 127mm | 64mm | 22.07 |
20B42 | 42 | 424.88mm | 32mm | 84mm | 127mm | 64mm | 22.86 |
20B43 | 43 | 434.96mm | 32mm | 84mm | 127mm | 64mm | 23.40 |
20B44 | 44 | 445.06mm | 32mm | 84mm | 127mm | 64mm | 23.95 |
20B45 | 45 | 455.15mm | 32mm | 84mm | 127mm | 64mm | 24.49 |
20B46 | 46 | 465.25mm | 32mm | 84mm | 127mm | 64mm | 26.31 |
20B47 | 47 | 475.35mm | 32mm | 84mm | 127mm | 64mm | 28.12 |
20B48 | 48 | 485.45mm | 40mm | 102mm | 152mm | 64mm | 29.94 |
20B49 | 49 | 495.55mm | 40mm | 102mm | 152mm | 64mm | 31.76 |
20B50 | 50 | 505.65mm | 40mm | 102mm | 152mm | 64mm | 33.57 |
20B51 | 51 | 515.75mm | 40mm | 102mm | 152mm | 64mm | 35.39 |
20B52 | 52 | 525.85mm | 40mm | 102mm | 152mm | 64mm | 37.21 |
20B53 | 53 | 535.95mm | 40mm | 102mm | 152mm | 64mm | 39.02 |

Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Maximum Bore | Hub Diameter | Length Thru Bore (LTB) | Sprocket Weight (kg) |
---|---|---|---|---|---|---|---|
20C54 | 54 | 546.05mm | 40mm | 102mm | 152mm | 82mm | 32.90 |
20C55 | 55 | 556.15mm | 40mm | 102mm | 152mm | 82mm | 34.77 |
20C56 | 56 | 566.25mm | 40mm | 102mm | 152mm | 82mm | 36.63 |
20C57 | 57 | 576.35mm | 40mm | 102mm | 152mm | 82mm | 38.50 |
20C58 | 58 | 586.45mm | 40mm | 102mm | 152mm | 82mm | 40.37 |
20C59 | 59 | 596.56mm | 40mm | 102mm | 152mm | 82mm | 42.24 |
20C60 | 60 | 606.66mm | 40mm | 102mm | 152mm | 82mm | 44.10 |
20C70 | 70 | 707.68mm | 40mm | 133mm | 178mm | 95mm | 65.36 |
20C72 | 72 | 727.89mm | 40mm | 133mm | 178mm | 95mm | 67.23 |
20C76 | 76 | 768.30mm | 40mm | 133mm | 178mm | 95mm | 70.98 |
20C80 | 80 | 808.71mm | 40mm | 133mm | 178mm | 95mm | 74.70 |
20C84 | 84 | 849.13mm | 40mm | 133mm | 178mm | 95mm | 78.43 |
20C90 | 90 | 909.76mm | 40mm | 133mm | 178mm | 95mm | 84.03 |
20C95 | 95 | 960.28mm | 40mm | 133mm | 178mm | 114mm | 117.18 |
20C96 | 96 | 970.38mm | 40mm | 133mm | 178mm | 114mm | 117.56 |
20C114 | 114 | 1152.27mm | 40mm | 133mm | 178mm | 114mm | 124.40 |

Sprocket Size | Tooth Count | Pitch Diameter | Bushing Number | Bushing Max. Bore | Dimension (L) | Dimension (C) | Sprocket Weight (kg) | Bushing Weight (kg) |
---|---|---|---|---|---|---|---|---|
20BTB11H | 11 | 112.70mm | 1615 | 41.28mm | 38.10mm | 62.69mm | 1.22 | 0.54 |
20BTB12H | 12 | 122.67mm | 1615 | 41.28mm | 38.10mm | 70.64mm | 1.41 | 0.54 |
20BTB13H | 13 | 132.67mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.45 | 0.77 |
20BTB14H | 14 | 142.68mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.63 | 0.77 |
20BTB15H | 15 | 152.71mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 2.31 | 1.59 |
20BTB16H | 16 | 162.75mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 2.72 | 1.59 |
20BTB17H | 17 | 172.79mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 3.27 | 1.59 |
20BTB18H | 18 | 182.84mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 3.63 | 1.59 |
20BTB19H | 19 | 192.90mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 4.09 | 1.59 |
20BTB20H | 20 | 202.96mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 4.40 | 1.59 |
20BTB21H | 21 | 213.03mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 4.54 | 1.59 |
20BTB22H | 22 | 223.10mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 4.77 | 1.59 |
20BTB23H | 23 | 233.17mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 5.58 | 1.59 |
20BTB24H | 24 | 243.25mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 6.13 | 1.59 |
20BTB25H | 25 | 253.32mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 6.95 | 1.59 |
20BTB26H | 26 | 263.41mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 7.35 | 1.59 |
20BTB28H | 28 | 283.57mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 7.90 | 2.95 |
20BTB30H | 30 | 303.75mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 9.62 | 2.95 |
20BTB32 | 32 | 323.92mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 11.03 | 2.95 |
20BTB35 | 35 | 354.20mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 13.15 | 2.95 |
20BTB36 | 36 | 364.29mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 13.86 | 2.95 |
20BTB38 | 38 | 384.48mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 15.98 | 2.95 |
20BTB40 | 40 | 404.67mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 19.43 | 2.95 |
20BTB45 | 45 | 455.15mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 25.18 | 2.95 |
20BTB48 | 48 | 485.45mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 28.62 | 2.95 |
20BTB54 | 54 | 546.05mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 35.52 | 2.95 |
20BTB57 | 57 | 576.35mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 37.82 | 2.95 |
20BTB60 | 60 | 606.66mm | 3020 | 76.20mm | 50.80mm | 133.35mm | 41.27 | 2.95 |
20CTB70 | 70 | 707.68mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 51.56 | 6.35 |
20CTB72 | 72 | 727.89mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 53.97 | 6.35 |
20CTB76 | 76 | 768.30mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 60.33 | 6.35 |
20CTB80 | 80 | 808.71mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 66.23 | 6.35 |
20CTB84 | 84 | 849.13mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 73.48 | 6.35 |
20CTB90 | 90 | 909.76mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 94.33 | 6.35 |
20CTB95 | 95 | 960.28mm | 3535 | 88.90mm | 88.90mm | 171.45mm | 96.16 | 6.35 |
Feature
- Fully Meets All ISO British Standards
- Tensile Strength: 20,000lbs
- Supplied As A 10ft Box Including One Connecting Link
- Heat Treated For Increased Durability
- Solid Rollers For Increased Performance And Wear Life

- Pitch (P): 1.250"
- Roller Width (W): 0.770"
- Roller Diameter (D): 0.750"
- Plate Height (H): 1.040"
- Plate Thickness (T): 0.175"
- Pin Diameter (E): 0.401"
- Overall Width (F): 1.572"
- Tensile Strength: 20,000lbs
- Weight: 2.43lbs/ft