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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Finished Bore |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Construction | Welded |
| Construction Type | Welded |
| Finished Bore Size | 3/4" |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | B |
| Hub Diameter | 3 1/2" |
| Hub Outside Dia. | 3 1/2" |
| Individually Packaged | No |
| Length Through Bore | 1 1/8" |
| Length Thru Bore | 1 1/8" |
| Material | Steel |
| Max. Bore Size | 2 3/8" |
| Min. Bore Size | 3/4" |
| Number Of Chain Rows | 1 |
| Number 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 | 1 1/8" |
| Storage Dimension Length | 9 1/5" |
| Storage Dimension Width | 9 1/5" |
Shipping Info:
| Ship weight (kg) | 3.14 |
| Ship height (cm) | 2.87 |
| Ship length (cm) | 23.37 |
| Ship width (cm) | 23.37 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | Set Screw Size | For Chain Pitch | For Chain Number | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40B8 | 8 | 1.3066" | 1.507" | 7/8" | - | 1/2" | 40 | Finished Bore | €23.84 | |
![]() |
40B9 | 9 | 1.4619" | 1.674" | 7/8" | - | 1/2" | 40 | Finished Bore | €24.93 | |
![]() |
40B10 | 10 | 1.618" | 1.839" | 7/8" | 3/4"-10 | 1/2" | 40 | Finished Bore | €25.49 | |
![]() |
40B11 | 11 | 1.7747" | 2.003" | 7/8" | - | 1/2" | 40 | Finished Bore | €27.97 | |
![]() |
40B12 | 12 | 1.9319" | 2.166" | 7/8" | - | 1/2" | 40 | Finished Bore | €29.88 | |
![]() |
40B13 | 13 | 2.0893" | 2.329" | 7/8" | - | 1/2" | 40 | Finished Bore | €30.42 | |
![]() |
40B14 | 14 | 2.247" | 2.491" | 7/8" | 1/4"-20 | 1/2" | 40 | Finished Bore | €30.42 |
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Contact us
Contact your account manager right away to get personal advice.
We're available Monday through Friday, from 07:30 until 17:00.
MARTIN SPROCKET 40B56 Sprocket, 40 Chain, 56 Teeth, 8.917 Inch Pitch Dia., 9.203 Inch O.D., Steel
€108.34 /unit







