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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 7/8" |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Chain Size | #40 |
| Construction | Welded |
| Construction Type | Welded |
| Finished Bore Size | 7/8" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | B |
| Hub Dia. | 3 1/2" |
| Hub Outside Dia. | 3 1/2" |
| Individually Packaged | No |
| Key Way Size | 3/16" x 3/32" |
| Length Through Bore | 1 1/8" |
| Length Thru Bore | 1 1/8" |
| Material | Steel |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 56 |
| Pitch | 1/2" |
| Pitch Dia. | 8.9174" |
| Screw Size | 1/4"-20 x 1/4" |
| Set Screw Location | (1) Over Keyway And (1) At 90° |
| Set Screw Size | 1/4"-20 |
| Set Screw Thread Type | Coarse |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 1.13" |
| Storage Dimension Length | 9.203" |
| Storage Dimension Width | 9.203" |
| Type | Type B Bored to Size Single Strand Welded |
Shipping Info:
| Ship weight (kg) | 3.06 |
| Ship height (cm) | 2.87 |
| Ship length (cm) | 23.37 |
| Ship width (cm) | 23.37 |
| Country of Origin | US |
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Bore Dia. | Length Thru Bore | Set Screw Size | Key Way Size | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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40BS9 1/2 | 1.462" | 9 | 7/8" | 1 1/8" | 1/2" | 7/8" | #10-24 | 1/8" x 1/16" | €29.33 | |
![]() |
40BS9 5/8 | 1.462" | 9 | 7/8" | 1 1/8" | 5/8" | 7/8" | 1/4"-20 | 3/16" x 3/32" | €29.33 | |
![]() |
40BS10 1/2 | 1.618" | 10 | 7/8" | 1 1/4" | 1/2" | 7/8" | #10-24 | 1/8" x 1/16" | €30.42 | |
![]() |
40BS10 5/8 | 1.618" | 10 | 7/8" | 1 1/4" | 5/8" | 7/8" | 1/4"-20 | 3/16" x 3/32" | €30.42 | |
![]() |
40BS10 3/4 | 1.618" | 10 | 7/8" | 1 1/4" | 3/4" | 7/8" | 1/4"-20 | 3/16" x 3/32" | €30.42 | |
![]() |
40BS11 1/2 | 1.775" | 11 | 7/8" | 1 3/8" | 1/2" | 7/8" | #10-24 | 1/8" x 1/16" | €31.80 | |
![]() |
40BS11 5/8 | 1.775" | 11 | 7/8" | 1 3/8" | 5/8" | 7/8" | 1/4"-20 | 3/16" x 3/32" | €31.80 |
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MARTIN SPROCKET 40BS56 7/8 Roller Chain Sprocket, Bore To Size, 0.875 Inch Bore, 9.203 Inch Outside Dia. Steel
€138.30 /unit







