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Product Specifications:
| Item | Roller Chain Sprocket |
| Bore Type | Bushed |
| Bushing Part Number | SH |
| Bushing Size | SH |
| 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 3/4" |
| Hub Outside Dia. | 2 3/4" |
| Individually Packaged | Yes |
| Length Through Bore | 13/16" |
| Length Thru Bore | 0.812" |
| Material | Steel |
| Max. Bore Size | 1 11/16" |
| Min. Bore Size | 1/2" |
| 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 |
| Screw Size | 1/4"-20 |
| 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) | 0.38 |
| Ship height (cm) | 2.06 |
| 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 Number | For Chain Pitch | Bore Type | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
40JA15H | 15 | 2.4049" | 2.652" | 5/8" | QD JA | 40 | 1/2" | Bushed | €77.79 | |
![]() |
40JA16H | 16 | 2.5629" | 2.814" | 1 1/16" | Type JA QD | 40 | 1/2" | Bushed | €80.26 | |
![]() |
40JA17H | 17 | 2.7211" | 2.975" | 5/8" | QD JA | 40 | 1/2" | Bushed | €86.43 | |
![]() |
40JA18H | 18 | 2.8794" | 3.136" | 1 1/16" | Type JA QD | 40 | 1/2" | Bushed | €88.70 | |
![]() |
40JA19H | 19 | 3.0378" | 3.296" | 5/8" | QD JA | 40 | 1/2" | Bushed | €89.87 | |
![]() |
40SH20H | 20 | 3.1962" | 3.457" | 1 5/16" | Type SH QD | 40 | 1/2" | Bushed | €90.47 | |
![]() |
40SH22H | 22 | 3.5133" | 3.778" | 13/16" | QD SH | 40 | 1/2" | Bushed | €109.82 |
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MARTIN SPROCKET 40SH21H Sprocket, QD, 40 Chain, 21 Teeth, 3.355 Inch Pitch Dia., 3.617 Inch O.D., Steel
€105.81 /unit


