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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Dia. | 3/4" |
| Bore Type | Finished Bore |
| Chain Number | 50 |
| Chain Pitch | 5/8" |
| Chain Size | #50 |
| Construction | Solid |
| Construction Type | Solid |
| Finished Bore Size | 3/4" |
| For Chain Number | 50 |
| For Chain Pitch | 5/8" |
| Hub Configuration | A |
| Individually Packaged | No |
| Length Through Bore | 0.343" |
| Length Thru Bore | 0.315" |
| Material | Steel |
| Min. Bore Size | 3/4" |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 21 |
| Outside Dia. | 4.522" |
| Pitch | 5/8" |
| Pitch Dia. | 4.193" , 4.1934" |
| Single Strand Tooth Thickness | 0.343" |
| Storage Dimension Height | 0.343" |
| Storage Dimension Length | 4.522" |
| Storage Dimension Width | 4.522" |
| Type | Stock Bore Type A |
Shipping Info:
| Ship weight (kg) | 0.5 |
| Ship height (cm) | 0.86 |
| Ship length (cm) | 11.48 |
| Ship width (cm) | 11.48 |
| Country of Origin | US |
Product Variants
| Product | Model | Material | Pitch Dia. | No. Of Teeth | Length Through Bore | Storage Dimension Length | Storage Dimension Width | Min. Bore Size | Bore Dia. | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
50A12 | Steel | 2.415" | 12 | 0.343" | 2.708" | 2.708" | 5/8" | 5/8" | €39.75 | |
![]() |
50A13 | Steel | 2.612" | 13 | 0.343" | 2.911" | 2.911" | 5/8" | 5/8" | €39.75 | |
![]() |
50A14 | Steel | 2.809" | 14 | 0.343" | 3.113" | 3.113" | 5/8" | 5/8" | €39.75 | |
![]() |
50A15 | Steel | 3.006" | 15 | 0.343" | 3.315" | 3.315" | 5/8" | 5/8" | €40.84 | |
![]() |
50A16 | Steel | 3.204" | 16 | 0.343" | 3.517" | 3.517" | 5/8" | 5/8" | €41.36 | |
![]() |
50A17 | Steel | 3.401" | 17 | 0.343" | 3.718" | 3.718" | 5/8" | 5/8" | €42.75 | |
![]() |
50A18 | Steel | 3.599" | 18 | 0.343" | 3.919" | 3.919" | 5/8" | 5/8" | €43.29 |
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MARTIN SPROCKET 50A21 Sprocket, Stock Bore, 50 Chain, 21 Teeth, 4.193 Inch Pitch Dia., 4.522 Inch O.D., Steel
€46.31 /unit







