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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Diameter | 5/8" |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 5/8" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | A |
| Hub Diameter | 3 1/4" |
| Individually Packaged | No |
| Length Through Bore | 0.284" |
| Length Thru Bore | 0.265" |
| Material | Steel |
| Min. Bore Size | 5/8" |
| Number Of Chain Rows | 1 |
| Number Of Teeth | 25 |
| Outside Dia. | 4.258" |
| Pitch | 1/2" |
| Pitch Dia. | 3.9894" |
| Pitch Diameter | 3.989" |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 0.284" |
| Storage Dimension Length | 4.258" |
| Storage Dimension Width | 4.258" |
Shipping Info:
| Ship weight (kg) | 0.39 |
| Ship height (cm) | 0.71 |
| Ship length (cm) | 10.82 |
| Ship width (cm) | 10.82 |
| Country of Origin | US |
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | For Chain Number | For Chain Pitch | Bore Type | Pitch | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40A12 | 12 | 1.9319" | 2.166" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €33.41 | |
![]() |
40A13 | 13 | 2.0893" | 2.329" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €33.99 | |
![]() |
40A14 | 14 | 2.247" | 2.491" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €35.37 | |
![]() |
40A15 | 15 | 2.4049" | 2.652" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €35.91 | |
![]() |
40A16 | 16 | 2.5629" | 2.814" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €35.91 | |
![]() |
40A17 | 17 | 2.7211" | 2.975" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €37.25 | |
![]() |
40A18 | 18 | 2.8794" | 3.136" | 0.284" | 40 | 1/2" | Finished Bore | 1/2" | €37.25 |
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Contact us
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We're available Monday through Friday, from 07:30 until 17:00.
MARTIN SPROCKET 40A25 Sprocket, Stock Bore, 40 Chain, 25 Teeth, 3.989 Inch Pitch Dia., 4.258 Inch O.D., Steel
€43.29 /unit







