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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 5/8" to 2 1/4" |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Chain Size | #40 |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 5/8" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Grade | Grade 303, Grade304 |
| Hub Configuration | B |
| Hub Dia. | 3 1/4" |
| Hub Outside Dia. | 3 1/4" |
| Individually Packaged | No |
| Length Through Bore | 1" |
| Length Thru Bore | 1" |
| Material | Stainless Steel |
| Max. Bore Size | 2 1/4" |
| Min. Bore Size | 5/8" |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 25 |
| Outside Dia. | 4.258" |
| Pitch | 1/2" |
| Pitch Dia. | 3.989" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 1" |
| Storage Dimension Length | 4.418" |
| Storage Dimension Width | 4.418" |
| Type | Type B Single Strand Solid Reboreable |
Shipping Info:
| Ship weight (kg) | 1.15 |
| Ship height (cm) | 2.54 |
| Ship length (cm) | 10.82 |
| Ship width (cm) | 10.82 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Pitch Dia. | Outside Dia. | Bore Dia. | Length Through Bore | Hub Dia. | Set Screw Size | For Chain Pitch | For Chain Number | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40B8 | 1.3066" | 1.507" | 1/2" | 7/8" | 0.984" | - | 1/2" | 40 | €23.84 | |
![]() |
40B9 | 1.462" | 1.674" | 1/2" | 7/8" | 1 1/8" | - | 1/2" | 40 | €24.93 | |
![]() |
40B10 | 1.618" | 1.839" | 1/2" | 7/8" | 1 1/4" | 3/4"-10 | 1/2" | 40 | €25.49 | |
![]() |
40B11 | 1.775" | 2.003" | 1/2" | 7/8" | 1 3/8" | - | 1/2" | 40 | €27.97 | |
![]() |
40B12 | 1.932" | 2.166" | 1/2" | 7/8" | 1.593" | - | 1/2" | 40 | €29.88 | |
![]() |
40B13 | 2.089" | 2.329" | 1/2" | 7/8" | 1.563" | - | 1/2" | 40 | €30.42 | |
![]() |
40B14 | 2.247" | 2.491" | 1/2" | 7/8" | 1.688" | 1/4"-20 | 1/2" | 40 | €30.42 |
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MARTIN SPROCKET 40B25SS Roller Chain Sprocket, 40 Chain, 25 Teeth, 3.989 Inch Pitch Dia., 4.258 Inch O.D., SS
€451.69 /unit







