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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 20 mm to 70 mm |
| Chain Size | #12B-1 |
| Hub Dia. | 99.263 mm |
| Length Through Bore | 40 mm |
| Material | Steel |
| No. Of Teeth | 28 |
| Outside Dia. | 181.891 mm |
| Pitch | 19.05 mm |
| Pitch Dia. | 170.143 mm |
| Type | Type B Single Strand Stock Bore Welded |
Shipping Info:
| Ship weight (kg) | 3.09 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 18.19 |
| Ship width (cm) | 18.19 |
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
12B20 | 121.776 mm | 20 | 35 mm | 89.992 mm | 16 mm to 60 mm | Steel | 19.05 mm | #12B-1 | €159.47 | |
![]() |
12B42 | 254.917 mm | 42 | 40 mm | 106.782 mm | 25 mm to 75 mm | Steel | 19.05 mm | #12B-1 | €281.50 | |
![]() |
12B50 | 303.39 mm | 50 | 40 mm | 106.782 mm | 25 mm to 75 mm | Steel | 19.05 mm | #12B-1 | €349.20 | |
![]() |
12B65 | 394.301 mm | 65 | 45 mm | 110.007 mm | 32 mm to 78 mm | Steel | 19.05 mm | #12B-1 | €519.31 | |
![]() |
12B16 | 97.647 mm | 16 | 35 mm | 75.006 mm | 16 mm to 50 mm | Steel | 19.05 mm | #12B-1 | €124.20 | |
![]() |
12B34 | 206.463 mm | 34 | 40 mm | 99.441 mm | 20 mm to 70 mm | Steel | 19.05 mm | #12B-1 | €255.90 | |
![]() |
12B35 | 212.518 mm | 35 | 40 mm | 100 mm | 20 mm to 70 mm | Steel | 19.05 mm | #12B-1 | €257.87 |
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MARTIN SPROCKET 12B28 Roller Chain Sprocket, 12B-1 Chain, Stock Bore, 28 Teeth, 170.143 mm Pitch Dia., Steel
€233.74 /unit






