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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | SDS |
| Bushing Size | SDS |
| Chain Number | 50 |
| Chain Pitch | 5/8" |
| Construction | Solid |
| Construction Type | Solid |
| For Chain Number | 50 |
| For Chain Pitch | 5/8" |
| Hardened Teeth | 1 |
| Hub Configuration | B |
| Hub Diameter | 3 1/4" |
| Hub Outside Dia. | 3 1/4" |
| Individually Packaged | Yes |
| Length Through Bore | 3/4" |
| Length Thru Bore | 3/4" |
| Material | Steel |
| Max. Bore Size | 2" |
| Min. Bore Size | 1/2" |
| No. Of Teeth | 21 |
| Number Of Chain Rows | 1 |
| Number Of Teeth | 21 |
| Outside Dia. | 4.522" |
| Pitch | 5/8" |
| Pitch Dia. | 4.1934" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Screw Size | 1/4"-20 |
| Single Strand Tooth Thickness | 0.343" |
| Storage Dimension Height | 13/16" |
| Storage Dimension Length | 5 1/16" |
| Storage Dimension Width | 5 1/16" |
Shipping Info:
| Ship weight (kg) | 0.59 |
| Ship height (cm) | 1.91 |
| Ship length (cm) | 11.48 |
| Ship width (cm) | 11.48 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | Bushing Type | For Chain Number | For Chain Pitch | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
50JA12H | 12 | 2.4148" | 2.708" | 5/8" | QD JA | 50 | 5/8" | Bushed | €82.44 | |
![]() |
50JA13H | 13 | 2.6116" | 2.911" | 5/8" | Type JA QD | 50 | 5/8" | Bushed | €88.70 | |
![]() |
50JA14H | 14 | 2.8087" | 3.113" | 5/8" | QD JA | 50 | 5/8" | Bushed | €92.52 | |
![]() |
50JA15H | 15 | 3.0061" | 3.315" | 5/8" | Type JA QD | 50 | 5/8" | Bushed | €96.89 | |
![]() |
50JA16H | 16 | 3.2036" | 3.517" | 5/8" | QD JA | 50 | 5/8" | Bushed | €98.34 | |
![]() |
50SH17H | 17 | 3.4014" | 3.718" | 1 5/16" | Type SH QD | 50 | 5/8" | Bushed | €97.07 | |
![]() |
50SH18H | 18 | 3.5992" | 3 23/25" | 1 5/16" | Type SH QD | 50 | 5/8" | Bushed | €110.36 |
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Contact us
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MARTIN SPROCKET 50SDS21H Sprocket, QD, 50 Chain, 21 Teeth, 4.193 Inch Pitch Dia., 4.522 Inch O.D., Steel
€123.33 /unit


