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- 40 Chain Number
- 42 Teeth
- 2 Strands
- QD Bushing
- Without Hardened Teeth
features
- Tolerances meet or exceed ANSI standards
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
- Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
- Bores are concentric to pitch line, minimizing run out
- Interchangeable with other manufacturers’ QD bushings
| Hardened Teeth | Without Hardened Teeth |
| Tooth Width | 0.275 in |
| Hub Length | 0.41 in |
| Bore Type | Bushed |
| Width Across Teeth | 0.841 in |
| Overall Length | 1.25 in |
| Bushing Type | QD |
| Chain No. | 40 |
| Bushing Series | SK |
| Chain Pitch | 0.5 in |
| Single Strand Tooth Thickness | 0.275 in |
| Type | C |
| Outside Dia. [Min] | 6.972 in |
| Caliper Diameter | 6.38 in |
| Bushing Bore [Max] | 2.625 in |
| Hub Dia. | 4 in |
| No. of Strands Across | 2 |
| Screw Size | 5/16-18 UNC |
| Bushing Bore [Min] | 0.5 in |
| Martin No. | 40SK42 |
| No. of Teeth | 42 |
| Pitch Diameter | 6.69 in |
| Overall Length Less Threads | N/A |
| Outside Dia. | 6.972 in |
| Hub Projection | 0.41 in |
| Material | Steel |
| Inch/Metric | Inch |
| Sprocket Style | C |
| Length Through Bore | 1.25 in |
| Weight | 6.82 LB |
| EAN or UPC | 697950007304 |
