FREE delivery on orders over €150
Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | 2012 |
| 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 Outside Dia. | 3 1/2" |
| Individually Packaged | No |
| Length Through Bore | 1 1/4" |
| Length Thru Bore | 1 1/4" |
| Material | Steel |
| Max. Bore Size | 2" |
| Min. Bore Size | 1/2" |
| No. Of Teeth | 21 |
| Number Of Chain Rows | 2 |
| Number Of Teeth | 21 |
| Outside Dia. | 4.522" |
| Pitch | 5/8" |
| Pitch Dia. | 4.1934" |
| Single Strand Tooth Thickness | 0.332" |
| Storage Dimension Height | 1 1/4" |
| Storage Dimension Length | 4.522" |
| Storage Dimension Width | 4.522" |
Shipping Info:
| Ship weight (kg) | 0.89 |
| Ship height (cm) | 3.18 |
| Ship length (cm) | 11.48 |
| Ship width (cm) | 11.48 |
| Country of Origin | US |
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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D50ATB14H | 14 | 2.8087" | 3.113" | 7/8" | 1008 Taper Lock | 50 | 5/8" | Bushed | €169.11 | |
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D50ATB15H | 15 | 3.0061" | 3.315" | 1" | 1210 Taper Lock | 50 | 5/8" | Bushed | €170.31 | |
![]() |
D50ATB16H | 16 | 3.2036" | 3.517" | 1" | 1210 Taper Lock | 50 | 5/8" | Bushed | €171.77 | |
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D50ATB18H | 18 | 3.5992" | 3 23/25" | 1" | 1610 Taper Lock | 50 | 5/8" | Bushed | €175.92 | |
![]() |
D50ATB19H | 19 | 3.7972" | 4.12" | 1" | 1610 Taper Lock | 50 | 5/8" | Bushed | €177.38 | |
![]() |
D50BTB20H | 20 | 3.9953" | 4.321" | 1 1/4" | 2012 Taper Lock | 50 | 5/8" | Bushed | €178.60 | |
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D50BTB25H | 25 | 4.9867" | 5.322" | 1 1/4" | 2012 Taper Lock | 50 | 5/8" | Bushed | €210.23 |
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Contact us
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MARTIN SPROCKET D50BTB21H Sprocket, Taper, 50 Chain, 21 Teeth, 4.193 Inch Pitch Dia., 4.522 Inch O.D., Steel
€181.29 /unit







