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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 12 mm |
| Chain Size | #08B-1 |
| Hub Dia. | 70.002 mm |
| Length Through Bore | 27.991 mm |
| Material | Steel |
| No. Of Teeth | 21 |
| Outside Dia. | 92.577 mm |
| Pitch | 12.7 mm |
| Pitch Dia. | 85.211 mm |
| Type | Simplex Type B |
Shipping Info:
| Ship weight (kg) | 0.81 |
| Ship height (cm) | 2.79 |
| Ship length (cm) | 9.25 |
| Ship width (cm) | 9.25 |
| Country of Origin | US |
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Bore Dia. | Material | Pitch | Chain Size | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
08B11 | 45.078 mm | 11 | 25 mm | 30.201 mm | 10 mm to 22 mm | Steel | 12.7 mm | #08B-1 | €57.20 | |
![]() |
08B12 | 49.069 mm | 12 | 28 mm | 34.341 mm | 10 mm to 22 mm | Steel | 12.7 mm | #08B-1 | €60.96 | |
![]() |
08B17 | 69.116 mm | 17 | 27.991 mm | 54 mm | 12 mm | Steel | 12.7 mm | #08B-1 | €76.15 | |
![]() |
08B18 | 73.136 mm | 18 | 27.991 mm | 56.998 mm | 12 mm | Steel | 12.7 mm | #08B-1 | €81.18 | |
![]() |
08B23 | 93.268 mm | 23 | 28 mm | 78.003 mm | 12 mm to 55 mm | Steel | 12.7 mm | #08B-1 | €121.42 | |
![]() |
08B38 | 153.791 mm | 38 | 35.001 mm | 87.935 mm | 16 mm | Steel | 12.7 mm | #08B-1 | €169.37 | |
![]() |
08B45 | 182.062 mm | 45 | 35 mm | 87.935 mm | 19 mm to 60 mm | Steel | 12.7 mm | #08B-1 | €182.49 |
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MARTIN SPROCKET 08B21 Roller Chain Sprocket, 08B-1 Chain, Stock Bore, 21 Teeth, 85.211 mm Pitch Dia., Steel
€107.34 /unit







