12B roller chain sprockets are manufactured for metric 12B roller chain and are manufactured in accordance with ISO, DIN, and BS228/3 standards. Our sprockets are precision manufactured from high-quality steel, directly interchange with other manufactures, and are engineered for superb performance and durability. Common styles of these sprockets include B-Hub, C-Hub, and taper bushed type but others are available upon request. The below charts show our standard sizes for 12B sprockets, if you don’t see the exact sprocket you need we also custom manufacture sprockets.
12B A-Plate Sprockets:
Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Sprocket Weight (kg) |
---|---|---|---|---|
12A11 | 11 | 67.62mm | 14mm | 0.36 |
12A12 | 12 | 73.60mm | 14mm | 0.42 |
12A13 | 13 | 79.60mm | 14mm | 0.48 |
12A14 | 14 | 85.61mm | 14mm | 0.54 |
12A15 | 15 | 91.63mm | 14mm | 0.60 |
12A16 | 16 | 97.65mm | 14mm | 0.68 |
12A17 | 17 | 103.67mm | 14mm | 0.77 |
12A18 | 18 | 109.71mm | 14mm | 0.85 |
12A19 | 19 | 115.74mm | 14mm | 0.95 |
12A20 | 20 | 121.78mm | 14mm | 1.08 |
12A21 | 21 | 127.82mm | 16mm | 1.15 |
12A22 | 22 | 133.86mm | 16mm | 1.24 |
12A23 | 23 | 139.90mm | 19mm | 1.33 |
12A24 | 24 | 145.95mm | 19mm | 1.47 |
12A25 | 25 | 151.99mm | 19mm | 1.63 |
12A26 | 26 | 158.04mm | 19mm | 1.72 |
12A27 | 27 | 164.09mm | 19mm | 1.91 |
12A28 | 28 | 170.14mm | 19mm | 1.99 |
12A29 | 29 | 176.19mm | 19mm | 2.44 |
12A30 | 30 | 182.25mm | 19mm | 2.48 |
12A31 | 31 | 188.30mm | 19mm | 2.28 |
12A32 | 32 | 194.35mm | 19mm | 2.62 |
12A33 | 33 | 200.41mm | 19mm | 2.77 |
12A34 | 34 | 206.46mm | 19mm | 2.91 |
12A35 | 35 | 212.52mm | 19mm | 3.19 |
12A36 | 36 | 218.57mm | 19mm | 3.21 |
12A37 | 37 | 224.63mm | 19mm | 3.52 |
12A38 | 38 | 230.69mm | 24mm | 3.67 |
12A39 | 39 | 236.74mm | 24mm | 3.87 |
12A40 | 40 | 242.80mm | 24mm | 4.00 |
12A41 | 41 | 248.86mm | 24mm | 4.24 |
12A42 | 42 | 254.92mm | 24mm | 4.53 |
12A43 | 43 | 260.98mm | 24mm | 4.58 |
12A44 | 44 | 267.03mm | 25mm | 4.99 |
12A45 | 45 | 273.09mm | 25mm | 5.14 |
12A46 | 46 | 279.15mm | 25mm | 5.33 |
12A47 | 47 | 285.21mm | 25mm | 5.70 |
12A48 | 48 | 291.27mm | 25mm | 5.75 |
12A50 | 50 | 303.39mm | 25mm | 6.45 |
12A54 | 54 | 327.63mm | 32mm | 7.33 |
12A57 | 57 | 345.81mm | 32mm | 8.11 |
12A60 | 60 | 363.99mm | 32mm | 9.19 |
12A65 | 65 | 394.30mm | 32mm | 10.65 |
12A70 | 70 | 424.61mm | 32mm | 12.45 |
12A72 | 72 | 436.73mm | 32mm | 13.22 |
12A76 | 76 | 460.98mm | 32mm | 14.78 |
12A80 | 80 | 485.23mm | 32mm | 20.75 |
12A84 | 84 | 509.48mm | 32mm | 21.78 |
12A95 | 95 | 576.17mm | 32mm | 23.46 |
12A96 | 96 | 582.23mm | 32mm | 23.71 |
12A114 | 114 | 691.36mm | 32mm | 28.16 |
12B B-Hub Sprockets:
Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Maximum Bore | Hub Diameter | Length Thru Bore (LTB) | Sprocket Weight (kg) |
---|---|---|---|---|---|---|---|
12B11 | 11 | 67.62mm | 12mm | 32mm | 47mm | 35mm | 0.53 |
12B12 | 12 | 73.60mm | 12mm | 35mm | 53mm | 35mm | 0.67 |
12B13 | 13 | 79.60mm | 12mm | 38mm | 59mm | 35mm | 0.75 |
12B14 | 14 | 85.61mm | 12mm | 42mm | 64mm | 35mm | 0.91 |
12B15 | 15 | 91.63mm | 12mm | 45mm | 70mm | 35mm | 1.14 |
12B16 | 16 | 97.65mm | 16mm | 50mm | 75mm | 35mm | 1.27 |
12B17 | 17 | 103.67mm | 16mm | 52mm | 80mm | 35mm | 1.46 |
12B18 | 18 | 109.71mm | 16mm | 52mm | 80mm | 35mm | 1.69 |
12B19 | 19 | 115.74mm | 16mm | 60mm | 90mm | 35mm | 1.78 |
12B20 | 20 | 121.78mm | 16mm | 64mm | 90mm | 35mm | 2.10 |
12B21 | 21 | 127.82mm | 20mm | 64mm | 100mm | 40mm | 2.27 |
12B22 | 22 | 133.86mm | 20mm | 64mm | 100mm | 40mm | 2.38 |
12B23 | 23 | 139.90mm | 20mm | 67mm | 100mm | 40mm | 2.49 |
12B24 | 24 | 145.95mm | 20mm | 67mm | 100mm | 40mm | 2.62 |
12B25 | 25 | 151.99mm | 20mm | 67mm | 100mm | 40mm | 2.78 |
12B26 | 26 | 158.04mm | 20mm | 67mm | 100mm | 40mm | 2.89 |
12B27 | 27 | 164.09mm | 20mm | 67mm | 100mm | 40mm | 3.05 |
12B28 | 82 | 170.14mm | 20mm | 67mm | 100mm | 40mm | 3.12 |
12B29 | 29 | 176.19mm | 20mm | 67mm | 100mm | 40mm | 3.30 |
12B30 | 30 | 182.25mm | 20mm | 67mm | 100mm | 40mm | 3.44 |
12B31 | 31 | 188.30mm | 20mm | 67mm | 100mm | 40mm | 3.50 |
12B32 | 32 | 194.35mm | 20mm | 67mm | 100mm | 40mm | 3.75 |
12B33 | 33 | 200.41mm | 20mm | 67mm | 100mm | 40mm | 3.82 |
12B34 | 34 | 206.46mm | 20mm | 67mm | 100mm | 40mm | 3.99 |
12B35 | 35 | 212.52mm | 20mm | 67mm | 100mm | 40mm | 4.10 |
12B36 | 36 | 218.57mm | 20mm | 67mm | 100mm | 40mm | 4.35 |
12B37 | 37 | 224.63mm | 20mm | 67mm | 100mm | 40mm | 4.64 |
12B38 | 38 | 230.69mm | 25mm | 70mm | 107mm | 40mm | 4.92 |
12B39 | 39 | 236.74mm | 25mm | 70mm | 107mm | 40mm | 5.15 |
12B40 | 40 | 242.80mm | 25mm | 70mm | 107mm | 40mm | 5.22 |
12B41 | 41 | 248.86mm | 25mm | 70mm | 107mm | 40mm | 5.51 |
12B42 | 42 | 254.92mm | 25mm | 70mm | 107mm | 40mm | 5.78 |
12B43 | 43 | 260.98mm | 25mm | 70mm | 107mm | 40mm | 5.90 |
12B44 | 44 | 267.03mm | 25mm | 70mm | 107mm | 40mm | 6.30 |
12B45 | 45 | 273.09mm | 25mm | 70mm | 107mm | 40mm | 6.34 |
12B46 | 46 | 279.15mm | 25mm | 70mm | 107mm | 40mm | 6.62 |
12B47 | 47 | 285.21mm | 25mm | 70mm | 107mm | 40mm | 6.80 |
12B48 | 48 | 291.27mm | 25mm | 70mm | 107mm | 40mm | 7.18 |
12B50 | 50 | 303.39mm | 25mm | 70mm | 107mm | 40mm | 8.01 |
12B54 | 54 | 327.63mm | 32mm | 70mm | 110mm | 45mm | 9.80 |
12B57 | 57 | 345.81mm | 32mm | 70mm | 110mm | 45mm | 10.10 |
12B60 | 60 | 363.99mm | 32mm | 70mm | 110mm | 45mm | 11.44 |
12B65 | 65 | 394.30mm | 32mm | 70mm | 110mm | 45mm | 13.12 |
12B70 | 70 | 424.61mm | 32mm | 70mm | 110mm | 45mm | 14.51 |
12B72 | 72 | 436.73mm | 32mm | 80mm | 120mm | 50mm | 15.50 |
12B76 | 76 | 460.98mm | 32mm | 80mm | 120mm | 50mm | 17.26 |
12B80 | 80 | 485.23mm | 32mm | 80mm | 120mm | 50mm | 19.00 |
12B84 | 84 | 509.48mm | 32mm | 80mm | 120mm | 50mm | 21.07 |
12B95 | 95 | 576.17mm | 32mm | 92mm | 140mm | 55mm | 23.83 |
12B96 | 96 | 582.23mm | 32mm | 92mm | 140mm | 55mm | 26.61 |
12B114 | 114 | 691.36mm | 32mm | 92mm | 140mm | 55mm | 33.98 |
12B Taper Bushed Sprockets:
Sprocket Size | Tooth Count | Pitch Diameter | Bushing Number | Bushing Max. Bore | Dimension (L) | Dimension (C) | Sprocket Weight (kg) | Bushing Weight (kg) |
---|---|---|---|---|---|---|---|---|
12BTB11H | 11 | 67.62mm | 1008 | 25.40mm | 22.23mm | 46.04mm | 0.27 | 0.14 |
12BTB12H | 12 | 73.61mm | 1008 | 25.40mm | 22.23mm | 49.21mm | 0.36 | 0.14 |
12BTB13H | 13 | 79.60mm | 1210 | 31.75mm | 25.40mm | 62.69mm | 0.41 | 0.27 |
12BTB14H | 14 | 85.61mm | 1210 | 31.75mm | 25.40mm | 62.69mm | 0.45 | 0.27 |
12BTB15H | 15 | 91.63mm | 1610 | 41.28mm | 25.40mm | 70.64mm | 0.54 | 0.41 |
12BTB16H | 16 | 97.65mm | 1610 | 41.28mm | 25.40mm | 76.20mm | 0.73 | 0.41 |
12BTB17H | 17 | 103.67mm | 1610 | 41.28mm | 25.40mm | 82.55mm | 0.82 | 0.41 |
12BTB18H | 18 | 109.70mm | 1610 | 41.28mm | 25.40mm | 82.55mm | 0.91 | 0.41 |
12BTB19H | 19 | 115.74mm | 1610 | 41.28mm | 25.40mm | 82.55mm | 1.00 | 0.41 |
12BTB20H | 20 | 121.78mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.00 | 0.77 |
12BTB21H | 21 | 127.82mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.18 | 0.77 |
12BTB22H | 22 | 133.86mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.27 | 0.77 |
12BTB23H | 23 | 139.90mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.27 | 0.77 |
12BTB24H | 24 | 145.95mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.50 | 0.77 |
12BTB25H | 25 | 151.99mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.74 | 0.77 |
12BTB26H | 26 | 158.04mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.74 | 0.77 |
12BTB27H | 27 | 164.09mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 1.80 | 0.77 |
12BTB28H | 28 | 170.14mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 2.04 | 0.77 |
12BTB30H | 30 | 182.25mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 2.32 | 0.77 |
12BTB32 | 32 | 194.35mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 2.48 | 0.77 |
12BTB35 | 35 | 212.52mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 2.71 | 0.77 |
12BTB36 | 36 | 218.57mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 2.78 | 0.77 |
12BTB38 | 38 | 230.69mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 3.36 | 0.77 |
12BTB40 | 40 | 242.80mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 3.53 | 0.77 |
12BTB42 | 42 | 254.92mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 3.71 | 0.77 |
12BTB45 | 45 | 273.09mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 3.98 | 0.77 |
12BTB48 | 48 | 291.27mm | 2012 | 50.80mm | 31.75mm | 90.47mm | 4.24 | 0.77 |
12BTB54 | 54 | 327.63mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 8.30 | 1.59 |
12BTB57 | 57 | 345.81mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 8.76 | 1.59 |
12BTB60 | 60 | 363.99mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 9.22 | 1.59 |
12BTB68 | 68 | 412.49mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 10.45 | 1.59 |
12BTB70 | 70 | 424.61mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 10.76 | 1.59 |
12BTB72 | 72 | 436.73mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 11.06 | 1.59 |
12BTB76 | 76 | 460.98mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 11.68 | 1.59 |
12BTB84 | 84 | 509.48mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 12.91 | 1.59 |
12BTB95 | 95 | 576.17mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 14.60 | 1.59 |
12BTB96 | 96 | 582.23mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 14.75 | 1.59 |
12BTB114 | 114 | 691.36mm | 2517 | 63.50mm | 44.45mm | 107.95mm | 17.52 | 1.59 |