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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Construction | Solid With Recess Groove |
| Construction Type | Solid With Recess Groove |
| Finished Bore Size | 1/2" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hardened Teeth | 1 |
| Hub Configuration | B |
| Hub Outside Dia. | 1 9/16" |
| Hub Recessed For Chain | 1 |
| Individually Packaged | Yes |
| Length Through Bore | 2 1/8" |
| Length Thru Bore | 2 1/8" |
| Material | Steel |
| Max. Bore Size | 15/16" |
| Min. Bore Size | 1/2" |
| No. Of Teeth | 12 |
| Number Of Chain Rows | 3 |
| Number Of Teeth | 12 |
| Outside Dia. | 2.166" |
| Pitch | 1/2" |
| Pitch Dia. | 1.9319" |
| Pitch Diameter | 1.932" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Single Strand Tooth Thickness | 0.275" |
| Storage Dimension Height | 2 1/8" |
| Storage Dimension Length | 2 5/8" |
| Storage Dimension Width | 2 5/8" |
Shipping Info:
| Ship weight (kg) | 0.49 |
| Ship height (cm) | 5.41 |
| Ship length (cm) | 5.51 |
| Ship width (cm) | 5.51 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | For Chain Number | For Chain Pitch | Bore Type | Pitch | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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E40B11H | 11 | 1.7747" | 2.003" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €132.83 | |
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E40B13H | 13 | 2.0893" | 2.329" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €135.15 | |
![]() |
E40B14H | 14 | 2.247" | 2.491" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €135.15 | |
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E40B15H | 15 | 2.4049" | 2.652" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €136.17 | |
![]() |
E40B16H | 16 | 2.5629" | 2.814" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €139.77 | |
![]() |
E40B17H | 17 | 2.7211" | 2.975" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €146.45 | |
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E40B18H | 18 | 2.8794" | 3.136" | 2 1/8" | 40 | 1/2" | Finished Bore | 1/2" | €155.21 |
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MARTIN SPROCKET E40B12H Sprocket, 40 Chain, 12 Teeth, 1.932 Inch Pitch Dia., 2.166 Inch O.D., Steel
€134.62 /unit




