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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 41.28 mm |
| Bushing Type | 1615 Taper |
| Chain Size | #20B-1 |
| Hub Dia. | 71 mm |
| Length Through Bore | 38.1 mm |
| Material | Steel |
| No. Of Teeth | 12 |
| Pitch | 31.75 mm |
| Pitch Dia. | 122.67 mm |
| Product Datasheet | martin-sprocket-06a15.pdf |
| Type | Type B Single Strand Solid Stock Bore |
Shipping Info:
| Ship weight (kg) | 1.17 |
| Ship height (cm) | 3.81 |
| Ship length (cm) | 14.33 |
| Ship width (cm) | 14.33 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Bushing Type | Bore Dia. | Material | Pitch | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
20BTB15H | 152.71 mm | 15 | 44.45 mm | 108 mm | 2517 Taper | 63.5 mm | Steel | 31.75 mm | €518.81 | |
![]() |
20BTB16H | 162.75 mm | 16 | 44.45 mm | 108 mm | 2517 Taper | 63.5 mm | Steel | 31.75 mm | €549.67 | |
![]() |
20BTB20H | 202.96 mm | 20 | 44.45 mm | 107 mm | 2517 Taper | 63.5 mm | Steel | 31.75 mm | €659.61 | |
![]() |
20BTB21H | 213.03 mm | 21 | 44.45 mm | 107 mm | 2517 Taper | 63.5 mm | Steel | 31.75 mm | €678.32 | |
![]() |
20BTB36 | 364.29 mm | 36 | 50.8 mm | 133 mm | 3020 Taper | 76.2 mm | Steel | 31.75 mm | €851.74 | |
![]() |
20BTB40 | 404.67 mm | 40 | 50.8 mm | 133 mm | 3020 Taper | 76.2 mm | Steel | 31.75 mm | €980.76 | |
![]() |
20BTB13H | 132.67 mm | 13 | 31.75 mm | 90 mm | 2012 Taper | 50.8 mm | Steel | 31.75 mm | €374.65 |
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MARTIN SPROCKET 20BTB12H Sprocket, 20B-1 Chain, 12 Teeth, 122.670 mm Pitch Dia., 143.310 mm O.D., Steel
€341.08 /unit




