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- Sprocket for #40 Chain w/21 Teeth
- a Finished Bore of 1"
- Keyway 1/4" x 1/8"
- Pitch Diameter of 3.355" Single Strand, Style B Hub
| Inch/Metric | Inch |
| No. of Teeth | 21 |
| Sprocket Style | B |
| Chain No. | 40 |
| Length Through Bore | 0.9375 in |
| Hub Dia. | 2 3/4 in |
| Outside Dia. | 3.62 in |
| Hardened Teeth | Without Hardened Teeth |
| Hub Length Thru | 21/32 in |
| Finished Bore | 1 in |
| Chain Pitch | 0.5 in |
| Material | Steel |
| Keyway | 1/4 x 1/8 |
| Width Across Teeth | 0.284 in |
| No. of Strands Across | 1 |
| Pitch Diameter | 3.355 in |
| Weight | 1.44 LB |
