12B-3 roller chain sprockets are manufactured for metric 12B-3 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.
12B-3 B-Hub & C-Hub Sprockets:
| Sprocket Size | Tooth Count | Pitch Diameter | Stock Bore | Maximum Bore | Hub Diameter (H) | Length Thru Bore (L) | Sprocket Weight (kg) |
|---|---|---|---|---|---|---|---|
| E12B11 | 11 | 67.62mm | 20mm | 32mm | 47mm | 70mm | 1.13 |
| E12B12 | 12 | 73.60mm | 20mm | 36mm | 53mm | 70mm | 1.50 |
| E12B13 | 13 | 79.60mm | 20mm | 38mm | 59mm | 70mm | 1.77 |
| E12B14 | 14 | 85.61mm | 20mm | 42mm | 65mm | 70mm | |
| E12B15 | 15 | 91.63mm | 20mm | 45mm | 71mm | 70mm | 2.45 |
| E12B16 | 16 | 97.65mm | 20mm | 51mm | 77mm | 70mm | 2.95 |
| E12B17 | 17 | 103.67mm | 20mm | 54mm | 83mm | 70mm | 3.49 |
| E12B18 | 18 | 109.70mm | 20mm | 60mm | 89mm | 70mm | 3.86 |
| E12B19 | 19 | 115.74mm | 20mm | 62mm | 95mm | 70mm | 4.54 |
| E12B20 | 20 | 121.78mm | 20mm | 64mm | 100mm | 70mm | 5.08 |
| E12B21 | 21 | 127.82mm | 20mm | 64mm | 100mm | 70mm | 5.67 |
| E12B22 | 22 | 133.86mm | 20mm | 64mm | 100mm | 70mm | 5.99 |
| E12B23 | 23 | 139.90mm | 20mm | 73mm | 110mm | 70mm | 6.62 |
| E12B24 | 24 | 145.95mm | 20mm | 73mm | 110mm | 70mm | 7.17 |
| E12B25 | 25 | 151.99mm | 20mm | 80mm | 120mm | 70mm | 7.71 |
| E12B26 | 26 | 158.04mm | 20mm | 80mm | 120mm | 70mm | 8.44 |
| E12B27 | 27 | 164.09mm | 20mm | 80mm | 120mm | 70mm | 8.99 |
| E12B28 | 28 | 170.14mm | 20mm | 80mm | 120mm | 70mm | 9.49 |
| E12B29 | 29 | 176.19mm | 20mm | 80mm | 120mm | 70mm | 9.99 |
| E12B30 | 30 | 182.25mm | 20mm | 80mm | 120mm | 70mm | 10.53 |
| E12B35 | 35 | 212.52mm | 25mm | 85mm | 130mm | 70mm | 18.95 |
| E12B36 | 36 | 218.57mm | 25mm | 85mm | 130mm | 70mm | 19.49 |
| E12B38 | 38 | 230.69mm | 25mm | 85mm | 130mm | 70mm | 20.57 |
| E12B45 | 45 | 273.10mm | 25mm | 85mm | 130mm | 70mm | 24.36 |
| E12B48 | 48 | 291.27mm | 25mm | 85mm | 130mm | 70mm | 25.98 |
| E12C57 | 57 | 345.81mm | 32mm | 82mm | 130mm | 85mm | 33.73 |
| E12C60 | 60 | 363.99mm | 32mm | 82mm | 130mm | 85mm | 35.51 |
| E12C68 | 68 | 412.49mm | 32mm | 82mm | 130mm | 85mm | 40.24 |
| E12C76 | 76 | 460.98mm | 40mm | 95mm | 140mm | 85mm | 37.19 |
| E12C80 | 80 | 485.23mm | 40mm | 95mm | 140mm | 85mm | 39.15 |
| E12C95 | 95 | 576.17mm | 40mm | 95mm | 140mm | 100mm | 47.63 |
12B-3 Taper Bushed Sprockets:
| Sprocket Size | Tooth Count | Pitch Diameter | Bushing Size | Max. Bushing Bore | Dimension (H) | Length Thru bore (L) | Sprocket Weight (kg) |
|---|---|---|---|---|---|---|---|
| E12ATB17 | 17 | 103.67mm | 2012 | 50mm | — | 31.8mm | 1.28 |
| E12ATB19 | 19 | 115.75mm | 2012 | 50mm | — | 31.8mm | 2.02 |
| E12ATB21 | 21 | 127.82mm | 2517 | 65mm | — | 44.5mm | 2.09 |
| E12ATB23 | 23 | 139.90mm | 2517 | 65mm | — | 44.5mm | 3.00 |
| E12ATB25 | 25 | 152.00mm | 2517 | 65mm | — | 44.5mm | 3.97 |
| E12BTB27 | 27 | 164.09mm | 3020 | 75mm | 144mm | 51.0mm | 3.83 |
| E12BTB30 | 30 | 182.25mm | 3020 | 75mm | 143mm | 51.0mm | 5.72 |
| E12BTB38 | 38 | 230.69mm | 3020 | 75mm | 152mm | 51.0mm | 7.76 |
| E12CTB45 | 45 | 273.10mm | 3020 | 75mm | 160mm | 51.0mm | 10.04 |
| E12CTB57 | 57 | 345.81mm | 3020 | 75mm | 160mm | 51.0mm | 14.42 |
| E12CTB76 | 76 | 460.99mm | 3020 | 75mm | 160mm | 51.0mm | 25.50 |
| E12CTB95 | 95 | 576.17mm | 3020 | 75mm | 160mm | 51.0mm | 36.58 |
| E12CTB114 | 114 | 691.36mm | 3020 | 75mm | 160mm | 51.0mm | 47.66 |
