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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | 2012 |
| Bushing Type | 2012 Taper Lock |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Chain Size | 40-2 |
| Construction | Solid |
| Construction Type | Solid |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hub Configuration | B |
| Hub Dia. | 4.234" |
| Hub Outside Dia. | 4.2344" |
| 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 Chain Rows | 2 |
| No. Of Teeth | 30 |
| Outside Dia. | 5.057" |
| Pitch | 1/2" |
| Pitch Dia. | 4.783" , 4.7834" |
| Single Strand Tooth Thickness | 0.275" |
| Storage Dimension Height | 1 1/4" |
| Storage Dimension Length | 5.057" |
| Storage Dimension Width | 5.057" |
| Type | Double Strand TB Bushed Solid Type B |
Shipping Info:
| Ship weight (kg) | 1.53 |
| Ship height (cm) | 3.18 |
| Ship length (cm) | 12.85 |
| Ship width (cm) | 12.85 |
| Country of Origin | US |
Product Variants
| Product | Model | Pitch Dia. | No. Of Teeth | Length Through Bore | Hub Dia. | Chain Size | Storage Dimension Length | Storage Dimension Width | Storage Dimension Height | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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D40BTB18H | 2.879" | 18 | 1" | 2.313" | 40-2 | 3.136" | 3.136" | 1" | €129.69 | |
![]() |
D40BTB19H | 3.038" | 19 | 1" | 2 1/2" | 40-2 | 3.296" | 3.296" | 1" | €133.82 | |
![]() |
D40BTB20H | 3.196" | 20 | 1" | 2 5/8" | 40-2 | 3.457" | 3.457" | 1" | €139.42 | |
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D40BTB21H | 3.355" | 21 | 1" | 2 3/4" | 40-2 | 3.617" | 3.617" | 1" | €143.07 | |
![]() |
D40BTB23H | 3.672" | 23 | 1" | 3" | 40-2 | 3.938" | 3.938" | 1" | €169.11 | |
![]() |
D40BTB25H | 3.989" | 25 | 1 1/4" | 3.406" | 40-2 | 4.258" | 4.258" | 1 1/4" | €171.77 | |
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D40BTB36 | 5.737" | 36 | 1 1/4" | 5.156" | 40-2 | 6.015" | 6.015" | 1 1/4" | €225.29 |
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MARTIN SPROCKET D40BTB30 Sprocket, Taper, 40 Chain, 30 Teeth, 4.783 Inch Pitch Dia., 5.057 Inch O.D., Steel
€179.56 /unit







