FREE delivery on orders over €150
Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | SDS |
| Bushing Size | SDS |
| Bushing Type | Type SDS QD |
| Chain Number | 50 |
| Chain Pitch | 5/8" |
| Chain Size | #50 |
| Construction | Solid |
| Construction Type | Solid |
| For Chain Number | 50 |
| For Chain Pitch | 5/8" |
| Hub Configuration | B |
| Hub Dia. | 3 1/4" |
| Hub Outside Dia. | 3 1/2" |
| Individually Packaged | Yes |
| Length Through Bore | 1 3/8" |
| Length Thru Bore | 3/4" |
| Material | Steel |
| Max. Bore Size | 2" |
| Min. Bore Size | 1/2" |
| No. Of Chain Rows | 1 |
| No. Of Teeth | 20 |
| Outside Dia. | 4.321" |
| Pitch | 5/8" |
| Pitch Dia. | 3.995" , 3.9953" |
| Single Strand Tooth Thickness | 0.343" |
| Storage Dimension Height | 3/4" |
| Storage Dimension Length | 4 1/2" |
| Storage Dimension Width | 4 1/2" |
| Type | QD Bushed Type B |
Shipping Info:
| Ship weight (kg) | 0.54 |
| Ship height (cm) | 3.51 |
| Ship length (cm) | 10.97 |
| Ship width (cm) | 10.97 |
| Country of Origin | US |
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Storage Dimension Length | Storage Dimension Width | Storage Dimension Height | Hub Outside Dia. | Min. Bore Size | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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50JA12 | 2.415" | 12 | 5/8" | 3 1/16" | 3 1/16" | 13/16" | 2" | 3/8" | €66.70 | |
![]() |
50JA13 | 2.612" | 13 | 5/8" | 3 1/16" | 3 1/16" | 13/16" | 2" | 3/8" | €76.26 | |
![]() |
50JA14 | 2.809" | 14 | 5/8" | 3 3/16" | 3 3/16" | 3/4" | 2 1/8" | 3/8" | €78.09 | |
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50JA15 | 3.006" | 15 | 5/8" | 3 1/2" | 3 1/2" | 3/4" | 2 1/8" | 3/8" | €82.44 | |
![]() |
50JA16 | 3.204" | 16 | 5/8" | 4" | 4" | 0.7813" | 2 1/8" | 3/8" | €84.57 | |
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50SH17 | 3.401" | 17 | 1 5/16" | 3 7/8" | 3 7/8" | 15/16" | 2.688" | 1/2" | €89.22 | |
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50SH18 | 3.599" | 18 | 1 5/16" | 4 5/16" | 4 5/16" | 15/16" | 2 7/8" | 1/2" | €91.31 |
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Contact us
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MARTIN SPROCKET 50SDS20 Sprocket, QD, 50 Chain, 20 Teeth, 3.995 Inch Pitch Dia., 4.321 Inch O.D., Steel
€98.34 /unit







