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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Finished Bore |
| Chain Number | 2042 |
| Chain Pitch | 1" |
| Construction | Welded |
| Construction Type | Welded |
| Finished Bore Size | 3/4" |
| For Chain Number | 2042 |
| For Chain Pitch | 1" |
| Hub Configuration | B |
| Hub Diameter | 3 1/2" |
| Hub Outside Dia. | 3 1/2" |
| Individually Packaged | No |
| Length Through Bore | 1 1/8" |
| Length Thru Bore | 1 1/8" |
| Material | Steel |
| Max. Bore Size | 2 3/8" |
| Min. Bore Size | 3/4" |
| No. Of Teeth | 21 |
| Number Of Chain Rows | 1 |
| Number Of Teeth | 21 |
| Outside Dia. | 7.23" |
| Pitch | 1" |
| Pitch Dia. | 6.7095" |
| Pitch Diameter | 6.71" |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 1 1/8" |
| Storage Dimension Length | 7.23" |
| Storage Dimension Width | 7.23" |
Shipping Info:
| Ship weight (kg) | 2.16 |
| Ship height (cm) | 2.86 |
| Ship length (cm) | 18.36 |
| Ship width (cm) | 18.36 |
| Country of Origin | US |
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | For Chain Number | For Chain Pitch | Pitch | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
2042B8 | 8 | 2.6131" | 3.01" | 7/8" | 2042 | 1" | 1" | Finished Bore | €60.21 | |
![]() |
2042B9 | 9 | 2.9238" | 3.35" | 7/8" | 2042 | 1" | 1" | Finished Bore | €76.20 | |
![]() |
2042B10 | 10 | 3.2361" | 3 17/25" | 1" | 2042 | 1" | 1" | Finished Bore | €92.52 | |
![]() |
2042B11 | 11 | 3.5495" | 4.01" | 1" | 2042 | 1" | 1" | Finished Bore | €108.87 | |
![]() |
2042B12 | 12 | 3.8637" | 4.33" | 1" | 2042 | 1" | 1" | Finished Bore | €117.24 | |
![]() |
2042B14 | 14 | 4.494" | 4.98" | 1" | 2042 | 1" | 1" | Finished Bore | €130.33 | |
![]() |
2042B15 | 15 | 4.8097" | 5.3" | 1" | 2042 | 1" | 1" | Finished Bore | €137.68 |
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Contact us
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We're available Monday through Friday, from 07:30 until 17:00.
MARTIN SPROCKET 2042B21 Sprocket, 2042 Chain, 21 Teeth, 6.710 Inch Pitch Dia., 7.230 Inch O.D., Steel
€167.21 /unit



