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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 0.71875" to 8.373" |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Chain Size | #40 |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 0.7188" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | A |
| Individually Packaged | No |
| Length Through Bore | 0.284" |
| Length Thru Bore | 0.265" |
| Material | Steel |
| Min. Bore Size | 0.7188" |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 56 |
| Outside Dia. | 9.203" |
| Pitch | 1/2" |
| Pitch Dia. | 8.9174" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 0.284" |
| Storage Dimension Length | 9.204" |
| Storage Dimension Width | 9.204" |
| Type | Type A Single Strand Solid Reboreable |
Shipping Info:
| Ship weight (kg) | 2.16 |
| Ship height (cm) | 0.71 |
| Ship length (cm) | 23.37 |
| Ship width (cm) | 23.37 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Bore Dia. | Pitch Dia. | Outside Dia. | Length Through Bore | Hub Dia. | For Chain Number | For Chain Pitch | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40A12 | 1/2" | 1.932" | 2.166" | 0.284" | 1 9/16" | 40 | 1/2" | Finished Bore | €33.41 | |
![]() |
40A13 | 1/2" | 2.089" | 2.329" | 0.284" | 1 9/16" | 40 | 1/2" | Finished Bore | €33.99 | |
![]() |
40A14 | 1/2" | 2.247" | 2.491" | 0.284" | 1 11/16" | 40 | 1/2" | Finished Bore | €35.37 | |
![]() |
40A15 | 5/8" | 2.405" | 2.652" | 0.284" | 1 13/16" | 40 | 1/2" | Finished Bore | €35.91 | |
![]() |
40A16 | 5/8" | 2.563" | 2.814" | 0.284" | 2" | 40 | 1/2" | Finished Bore | €35.91 | |
![]() |
40A17 | 5/8" | 2.721" | 2.975" | 0.284" | 2 1/8" | 40 | 1/2" | Finished Bore | €37.25 | |
![]() |
40A18 | 5/8" | 2.879" | 3.136" | 0.284" | 2 5/16" | 40 | 1/2" | Finished Bore | €37.25 |
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Contact us
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MARTIN SPROCKET 40A56 Sprocket, 40 Chain, 56 Teeth, 8.917 Inch Pitch Dia., 9.203 Inch O.D., Steel
€79.74 /unit







