SIMPLEX SPROCKET 12B - TYPE B - STEEL
| NO. OF TEETH | PITCH DIAMETER | PART NUMBER | BORE | WEIGHT APPROX. (mm) | |
| STOCK(MM) | MAX.(MM) | ||||
| 11 | 67.62 | 12B11 | 12 | 32 | 0.53 |
| 12 | 73.6 | 12B12 | 12 | 35 | 0.67 |
| 13 | 79.6 | 12B13 | 12 | 38 | 0.75 |
| 14 | 85.61 | 12B14 | 12 | 42 | 0.91 |
| 15 | 91.63 | 12B15 | 12 | 45 | 1.14 |
| 16 | 97.65 | 12B16 | 16 | 50 | 1.27 |
| 17 | 103.67 | 12B17 | 16 | 52 | 1.46 |
| 18 | 109.71 | 12B18 | 16 | 52 | 1.69 |
| 19 | 115.74 | 12B19 | 16 | 60 | 1.78 |
| 20 | 121.78 | 12B20 | 16 | 64 | 2.1 |
| 21 | 127.82 | 12B21 | 20 | 64 | 2.27 |
| 22 | 133.86 | 12B22 | 20 | 64 | 2.38 |
| 23 | 139.9 | 12B23 | 20 | 67 | 2.49 |
| 24 | 145.95 | 12B24 | 20 | 67 | 2.62 |
| 25 | 151.99 | 12B25 | 20 | 67 | 2.78 |
| 26 | 158.04 | 12B26 | 20 | 67 | 2.89 |
| 27 | 164.09 | 12B27 | 20 | 67 | 3.05 |
| 28 | 170.14 | 12B28 | 20 | 67 | 3.12 |
| 29 | 176.19 | 12B29 | 20 | 67 | 3.3 |
| 30 | 182.25 | 12B30 | 20 | 67 | 3.44 |
| 31 | 188.3 | 12B31 | 20 | 67 | 3.5 |
| 32 | 194.35 | 12B32 | 20 | 67 | 3.75 |
| 33 | 200.41 | 12B33 | 20 | 67 | 3.82 |
| 34 | 206.46 | 12B34 | 20 | 67 | 3.99 |
| 35 | 212.52 | 12B35 | 20 | 67 | 4.1 |
| 36 | 218.57 | 12B36 | 20 | 67 | 4.35 |
| 37 | 224.74 | 12B37 | 20 | 67 | 4.64 |
| 38 | 230.69 | 12B38 | 25 | 70 | 4.92 |
| 39 | 236.74 | 12B39 | 25 | 70 | 5.15 |
| 40 | 242.8 | 12B40 | 25 | 70 | 5.22 |
| 41 | 248.86 | 12B41 | 25 | 70 | 5.51 |
| 42 | 254.92 | 12B42 | 25 | 70 | 5.78 |
| 43 | 260.98 | 12B43 | 25 | 70 | 5.9 |
| 44 | 267.03 | 12B44 | 25 | 70 | 6.3 |
| 45 | 273.09 | 12B45 | 25 | 70 | 6.34 |
| 46 | 279.15 | 12B46 | 25 | 70 | 6.62 |
| 47 | 285.21 | 12B47 | 25 | 70 | 6.8 |
| 48 | 291.27 | 12B48 | 25 | 70 | 7.18 |
| 50 | 303.39 | 12B50 | 25 | 70 | 8.01 |
| 54 | 327.63 | 12B54 | 32 | 70 | 9.8 |
| 57 | 345.81 | 12B57 | 32 | 70 | 10.1 |
| 60 | 363.99 | 12B60 | 32 | 70 | 11.44 |
| 65 | 394.3 | 12B65 | 32 | 70 | 13.12 |
| 70 | 424.61 | 12B70 | 32 | 70 | 14.51 |
| 72 | 436.73 | 12B72 | 32 | 80 | 15.5 |
| 76 | 460.98 | 12B76 | 32 | 80 | 17.26 |
| 80 | 485.23 | 12B80 | 32 | 80 | 19 |
| 84 | 509.48 | 12B84 | 32 | 80 | 21.07 |
| 95 | 576.17 | 12B95 | 32 | 92 | 23.83 |
| 96 | 582.23 | 12B96 | 32 | 92 | 26.61 |
| 114 | 691.36 | 12B114 | 32 | 92 | 33.98 |
