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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | H |
| Bushing Size | H |
| Chain Number | 40 |
| Chain Pitch | 1/2" |
| Construction | Solid |
| Construction Type | Solid |
| For Chain Number | 40 |
| For Chain Pitch | 1/2" |
| Hardened Teeth | 1 |
| Hub Configuration | B |
| Hub Diameter | 2 1/2" |
| Hub Outside Dia. | 2 1/2" |
| Individually Packaged | Yes |
| Length Through Bore | 7/8" |
| Length Thru Bore | 7/8" |
| Material | Steel |
| Max. Bore Size | 1 1/2" |
| Min. Bore Size | 3/8" |
| No. Of Teeth | 21 |
| Number Of Chain Rows | 1 |
| Number Of Teeth | 21 |
| Outside Dia. | 3.617" |
| Pitch | 1/2" |
| Pitch Dia. | 3.3548" |
| Product Datasheet | martin-sprocket-100a10.pdf |
| Single Strand Tooth Thickness | 0.284" |
| Storage Dimension Height | 15/16" |
| Storage Dimension Length | 3 7/8" |
| Storage Dimension Width | 3 7/8" |
Shipping Info:
| Ship weight (kg) | 0.44 |
| Ship height (cm) | 2.24 |
| Ship length (cm) | 9.19 |
| Ship width (cm) | 9.19 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Number Of Teeth | Pitch Dia. | Outside Dia. | Length Through Bore | Bushing Type | For Chain Pitch | For Chain Number | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40P31 | 31 | 4.9423" | 5.217" | 1 15/16" | Type P1 Split Taper | 1/2" | 40 | Bushed | €155.31 | |
![]() |
40P32 | 32 | 5.1011" | 5.377" | 1 5/16" | MST P1 | 1/2" | 40 | Bushed | €155.46 | |
![]() |
40P33 | 33 | 5.2601" | 5.536" | 1 5/16" | MST P1 | 1/2" | 40 | Bushed | €157.04 | |
![]() |
40P34 | 34 | 5.419" | 5.696" | 1 15/16" | Type P1 Split Taper | 1/2" | 40 | Bushed | €158.62 | |
![]() |
40P35 | 35 | 5.5779" | 5.855" | 1 5/16" | MST P1 | 1/2" | 40 | Bushed | €160.48 | |
![]() |
40P36 | 36 | 5.7369" | 6.015" | 1 5/16" | MST P1 | 1/2" | 40 | Bushed | €169.06 | |
![]() |
40P37 | 37 | 5.8958" | 6.175" | 1 5/16" | MST P1 | 1/2" | 40 | Bushed | €174.19 |
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MARTIN SPROCKET 40H21H Roller Chain Sprocket, 40 Chain, Bushed MST, 21 Teeth, 3.355 Inch Pitch Dia., Steel
€119.54 /unit



