MARTIN SPROCKET Duplex Stock Bore B Type Metric Roller Chain Sprockets, 12B-2 Chain Number
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| Style | Model | Material | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Bore Dia. | Chain Size | Pitch | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | D12B30 | High Carbon Steel | 182.247 mm | 30 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €495.14 | |
| B | D12B20 | High Carbon Steel | 121.776 mm | 20 | 50.013 mm | 125.4 mm | 20 mm to 88 mm | #12B-2 | 19.05 mm | €340.71 | |
| C | D12B38 | High Carbon Steel | 230.687 mm | 38 | 50.013 mm | 129.997 mm | 25 mm to 90 mm | #12B-2 | 19.05 mm | €727.45 | |
| D | D12B29 | High Carbon Steel | 176.195 mm | 29 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €458.41 | |
| E | D12B26 | High Carbon Steel | 158.043 mm | 26 | 49.987 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €348.28 | |
| D | D12B25 | High Carbon Steel | 151.995 mm | 25 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €335.18 | |
| D | D12B24 | High Carbon Steel | 145.948 mm | 24 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €322.27 | |
| F | D12B27 | High Carbon Steel | 164.093 mm | 27 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €385.00 | |
| D | D12B22 | High Carbon Steel | 133.858 mm | 22 | 50.013 mm | 100 mm | 20 mm to 70 mm | #12B-2 | 19.05 mm | €366.96 | |
| G | D12B35 | High Carbon Steel | 212.518 mm | 35 | 50.013 mm | 129.997 mm | 20 mm to 90 mm | #12B-2 | 19.05 mm | €553.07 | |
| H | D12B36 | High Carbon Steel | 218.574 mm | 36 | 50.013 mm | 129.997 mm | 25 mm to 90 mm | #12B-2 | 19.05 mm | €568.55 | |
| D | D12B32 | High Carbon Steel | 194.354 mm | 32 | 50.013 mm | 129.997 mm | 20 mm to 90 mm | #12B-2 | 19.05 mm | €519.31 | |
| I | D12B18 | High Carbon Steel | 109.705 mm | 18 | 50.013 mm | 89.002 mm | 20 mm to 60 mm | #12B-2 | 19.05 mm | €301.33 | |
| J | D12B17 | High Carbon Steel | 103.674 mm | 17 | 50.013 mm | 83.007 mm | 20 mm to 57 mm | #12B-2 | 19.05 mm | €289.06 | |
| K | D12B28 | High Carbon Steel | 170.143 mm | 28 | 50.013 mm | 119.99 mm | 20 mm to 84 mm | #12B-2 | 19.05 mm | €421.71 | |
| L | D12B15 | High Carbon Steel | 91.625 mm | 15 | 50.013 mm | 70.993 mm | 16 mm to 50 mm | #12B-2 | 19.05 mm | €255.90 | |
| M | D12B14 | High Carbon Steel | 85.61 mm | 14 | 50.013 mm | 64.999 mm | 16 mm to 45 mm | #12B-2 | 19.05 mm | €246.00 | |
| N | D12B40 | High Carbon Steel | 242.802 mm | 40 | 50.013 mm | 129.997 mm | 25 mm to 90 mm | #12B-2 | 19.05 mm | €678.51 | |
| O | D12B12 | High Carbon Steel | 73.604 mm | 12 | 50.013 mm | 53.01 mm | 16 mm to 36 mm | #12B-2 | 19.05 mm | €215.67 | |
| P | D12B11 | High Carbon Steel | 67.617 mm | 11 | 50.013 mm | 46.99 mm | 16 mm to 32 mm | #12B-2 | 19.05 mm | €207.47 | |
| Q | D12B45 | High Carbon Steel | 273.093 mm | 45 | 50.013 mm | 129.997 mm | 25 mm to 90 mm | #12B-2 | 19.05 mm | €783.45 | |
| R | D12B48 | Steel | 291.27 mm | 48 | 50.013 mm | 129.997 mm | 25 mm | 12B-2 | 19.05 mm | €847.67 | |
| S | D12B57 | Steel | 345.812 mm | 57 | 64.999 mm | 129.997 mm | 32 mm | 12B-2 | 19.05 mm | €1,040.35 | |
| D | D12B21 | Steel | 127.816 mm | 21 | 50.013 mm | 100 mm | 20 mm | 12B-2 | 19.05 mm | €362.01 | |
| T | D12B19 | Steel | 115.739 mm | 19 | 50.013 mm | 94.996 mm | 20 mm | 12B-2 | 19.05 mm | €318.55 | |
| U | D12B16 | Steel | 97.647 mm | 16 | 50.013 mm | 76.987 mm | 20 mm | 12B-2 | 19.05 mm | €274.21 | |
| V | D12B13 | Steel | 79.602 mm | 13 | 50.013 mm | 59.004 mm | 16 mm | 12B-2 | 19.05 mm | €233.74 | |
| D | D12B23 | Steel | 139.902 mm | 23 | 50.013 mm | 110.007 mm | 20 mm | 12B-2 | 19.05 mm | €370.18 |
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