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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 63.5 mm |
| Bushing Type | 2517 Taper |
| Chain Size | #12B-2 |
| Hub Dia. | 108 mm |
| Length Through Bore | 44.45 mm |
| Material | High Carbon Steel |
| No. Of Teeth | 25 |
| Outside Dia. | 163.74 mm |
| Pitch | 19.05 mm |
| Pitch Dia. | 151.99 mm |
| Type | Type B Double Strand Solid Stock Bore |
Shipping Info:
| Ship weight (kg) | 3.6 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 16.38 |
| Ship width (cm) | 16.38 |
| Country of Origin | US |
Product Variants
| Product | Model | Material | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Chain Size | Bushing Type | Bore Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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D12BTB15 | Steel | 91.63 mm | 15 | 38.1 mm | 72.09 mm | 12B-2 | 1615 Taper Lock | - | €343.08 | |
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D12BTB21 | High Carbon Steel | 127.82 mm | 21 | 44.45 mm | 109 mm | #12B-2 | 2517 Taper | 63.5 mm | €406.33 | |
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D12BTB23 | High Carbon Steel | 139.9 mm | 23 | 44.45 mm | 108 mm | #12B-2 | 2517 Taper | 63.5 mm | €435.40 | |
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D12BTB30 | High Carbon Steel | 182.25 mm | 30 | 44.45 mm | 164 mm | #12B-2 | 2517 Taper | 63.5 mm | €660.06 | |
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D12CTB38 | High Carbon Steel | 230.69 mm | 38 | 44.45 mm | 152 mm | #12B-2 | 2517 Taper | 63.5 mm | €742.71 | |
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D12CTB57 | High Carbon Steel | 345.81 mm | 57 | 44.45 mm | 108 mm | #12B-2 | 2517 Taper | 63.5 mm | €1,103.58 | |
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D12BTB16 | High Carbon Steel | 97.65 mm | 16 | 38.1 mm | 77 mm | #12B-2 | 1615 Taper | 41.28 mm | €358.35 |
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MARTIN SPROCKET D12BTB25 Sprocket, 12B-2 Chain, 25 Teeth, 151.990 mm Pitch Dia., 163.740 mm O.D., Steel
€464.46 /unit



