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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Finished Bore |
| Chain Number | 50 |
| Chain Pitch | 5/8" |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 1" |
| For Chain Number | 50 |
| For Chain Pitch | 5/8" |
| Hardened Teeth | 1 |
| Hub Configuration | B |
| Hub Outside Dia. | 3 1/2" |
| Individually Packaged | No |
| Length Through Bore | 2 5/8" |
| Length Thru Bore | 2 5/8" |
| Material | Steel |
| Max. Bore Size | 2 3/8" |
| Min. Bore Size | 1" |
| No. Of Teeth | 21 |
| Number Of Chain Rows | 3 |
| Number Of Teeth | 21 |
| Outside Dia. | 4.522" |
| Pitch | 5/8" |
| Pitch Dia. | 4.1934" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Single Strand Tooth Thickness | 0.332" |
| Storage Dimension Height | 2 5/8" |
| Storage Dimension Length | 4.522" |
| Storage Dimension Width | 4.522" |
Shipping Info:
| Ship weight (kg) | 3.34 |
| Ship height (cm) | 6.68 |
| Ship length (cm) | 11.48 |
| Ship width (cm) | 11.48 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Number Of Teeth | Outside Dia. | Pitch Dia. | Length Through Bore | For Chain Number | For Chain Pitch | Bore Type | Pitch | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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E50B11H | 11 | 2.504" | 2.218" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €167.83 | |
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E50B12H | 12 | 2.708" | 2.4148" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €168.86 | |
![]() |
E50B13H | 13 | 2.911" | 2.6116" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €172.44 | |
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E50B14H | 14 | 3.113" | 2.8087" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €172.98 | |
![]() |
E50B15H | 15 | 3.315" | 3.0061" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €174.01 | |
![]() |
E50B16H | 16 | 3.517" | 3.2036" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €185.10 | |
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E50B17H | 17 | 3.718" | 3.4014" | 2 1/2" | 50 | 5/8" | Finished Bore | 5/8" | €190.23 |
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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 E50B21H Sprocket, Stock Bore, 50 Chain, 21 Teeth, 4.193 Inch Pitch Dia., 4.522 Inch O.D., Steel
€222.14 /unit



