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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Diameter | 1/2" |
| Bore Size | 1/2" |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Construction | Solid With Recess |
| Construction Type | Solid With Recess |
| Finished Bore Size | 1/2" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | B |
| Hub Diameter | 1 1/8" |
| Hub Outside Dia. | 1 1/16" |
| Hub Recessed For Chain | 1 |
| Individually Packaged | Yes |
| Keyway Size | 1/8" x 1/16" |
| Length Through Bore | 7/8" |
| Length Thru Bore | 7/8" |
| Material | Steel |
| Number Of Chain Rows | 1 |
| Number Of Teeth | 9 |
| Outside Dia. | 1.674" |
| Pitch | 1/2" |
| Pitch Dia. | 1.4619" |
| Pitch Diameter | 1.462" |
| Set Screw Location | (2) 90° Apart (No Keyway) |
| Set Screw Size | #10-24 |
| Set Screw Thread Type | Coarse |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 15/16" |
| Storage Dimension Length | 1 15/16" |
| Storage Dimension Width | 1 15/16" |
Shipping Info:
| Ship weight (kg) | 0.06 |
| Ship height (cm) | 2.24 |
| Ship length (cm) | 4.24 |
| Ship width (cm) | 4.24 |
| Country of Origin | US |
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | Set Screw Size | Set Screw Location | Bore Size | For Chain Number | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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40BS9 5/8 | 9 | 1.4619" | 1.674" | 7/8" | 1/4"-20 | (1) Over Keyway And (1) At 90° | 5/8" | 40 | €29.33 | |
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40BS10 1/2 | 10 | 1.618" | 1.839" | 7/8" | #10-24 | (2) 90° Apart (No Keyway) | 1/2" | 40 | €30.42 | |
![]() |
40BS10 5/8 | 10 | 1.618" | 1.839" | 7/8" | 1/4"-20 | (1) Over Keyway And (1) At 90° | 5/8" | 40 | €30.42 | |
![]() |
40BS10 3/4 | 10 | 1.618" | 1.839" | 7/8" | 1/4"-20 | (1) Over Keyway And (1) At 90° | 3/4" | 40 | €30.42 | |
![]() |
40BS11 1/2 | 11 | 1.7747" | 2.003" | 7/8" | #10-24 | (2) 90° Apart (No Keyway) | 1/2" | 40 | €31.80 | |
![]() |
40BS11 5/8 | 11 | 1.7747" | 2.003" | 7/8" | 1/4"-20 | (1) Over Keyway And (1) At 90° | 5/8" | 40 | €31.80 | |
![]() |
40BS11 3/4 | 11 | 1.7747" | 2.003" | 7/8" | 1/4"-20 | (1) Over Keyway And (1) At 90° | 3/4" | 40 | €31.80 |
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MARTIN SPROCKET 40BS9 1/2 Roller Chain Sprocket, 40 Chain No., 0.5 Inch Bore, 1.674 Inch Outside Dia. Steel
€29.33 /unit







