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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 1 1/4" |
| Bore Size | 1 1/4" |
| Bore Type | Finished Bore |
| Chain Number | 50 |
| Chain Pitch | 5/8" |
| Chain Size | #50 |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 1 1/4" |
| For Chain Number | 50 |
| For Chain Pitch | 5/8" |
| Hardened Teeth | 1 |
| Hub Configuration | B |
| Hub Dia. | 1 7/8" |
| Hub Outside Dia. | 1 7/8" |
| Individually Packaged | Yes |
| Key Way Size | 1/4" x 1/8" |
| Length Thru Bore | 1" |
| Material | Steel |
| Max. Bore Size | 1 5/16" |
| Min. Bore Size | 1 1/4" |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 13 |
| Outside Dia. | 2.911" |
| Pitch | 5/8" |
| Pitch Dia. | 2.6116" , 2.612" |
| Screw Size | 0.313"-18 x 0.313" |
| Set Screw Location | (1) Over Keyway And (1) At 90° |
| Set Screw Size | 5/16"-18 |
| Set Screw Thread Type | Coarse |
| Single Strand Tooth Thickness | 0.343" |
| Storage Dimension Height | 1.06" |
| Storage Dimension Length | 3 1/4" |
| Storage Dimension Width | 3 1/4" |
| Type | Bored to Size Type BS |
Shipping Info:
| Ship weight (kg) | 0.27 |
| Ship height (cm) | 2.69 |
| Ship length (cm) | 7.39 |
| Ship width (cm) | 7.39 |
| Country of Origin | US |
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Bore Dia. | Storage Dimension Width | Storage Dimension Height | Length Thru Bore | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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50BS9HT 5/8 | 1.8274" | 9 | 1" | 1 3/8" | 5/8" | 3 1/8" | 1.31" | 1" | €59.77 | |
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50BS9HT 3/4 | 1.8274" | 9 | 1" | 1 3/8" | 3/4" | 5 1/4" | 1.13" | 1" | €59.77 | |
![]() |
50BS10HT 5/8 | 2.0225" | 10 | 1" | 1 9/16" | 5/8" | 2 9/16" | 1.06" | 1" | €64.57 | |
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50BS10HT 3/4 | 2.0225" | 10 | 1" | 1 9/16" | 3/4" | 2 9/16" | 1.06" | 1" | €64.57 | |
![]() |
50BS10HT 7/8 | 2.0225" | 10 | 1" | 1 9/16" | 7/8" | 2 9/16" | 1.06" | 1" | €64.57 | |
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50BS11HT 3/4 | 2.2184" | 11 | 1 3/4" | 1 3/4" | 3/4" | 2 9/16" | 1.06" | 1" | €67.65 | |
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50BS11HT 7/8 | 2.2184" | 11 | 1 3/4" | 1 3/4" | 7/8" | 3 1/4" | 1.06" | 1" | €67.65 |
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Contact us
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MARTIN SPROCKET 50BS13HT 1 1/4 Roller Chain Sprocket, 1.250 Inch Bore, 2.911 Inch Outside Dia. Steel, Hardened
€74.43 /unit




