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- 40 Chain Number
- 1 Strand
- 21 Teeth
- Without Hardened Teeth
- A Sprocket Style
description
- Maximum bores shown will accommodate standard keyseat and setscrew over keyseat. Slightly larger bores are possible with no keyseat, shallow keyseat, or setscrew at an angle to keyseat.
features
- Tolerances meet or exceed ANSI standards
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
| Inch/Metric | Inch |
| Hardened Teeth | Without Hardened Teeth |
| Hub Length Thru | N/A |
| No. of Strands Across | 1 |
| Bore Type | Reborable |
| No. of Teeth | 21 |
| Hub Projection | N/A |
| Outside Dia. | 3.62 in |
| Caliper Diameter | 3.03 in |
| Bore Style | Minimum Bore |
| Family Name | No. 40 - 1/2 in Pitch - Single - A |
| Chain No. | 40 |
| Pitch Diameter [Min] | 3.35 in |
| Outside Dia. [Min] | 3.62 in |
| Sprocket Style | A |
| Bore Range [Min] | 0.63 in |
| Width Across Teeth | 0.28 in |
| Material | Steel |
| Series | A |
| Martin No. | 40A21 |
| Bore Range [Max] | 2.79 in |
| Hub Dia. | N/A |
| Chain Pitch | 0.5 in |
| Length Through Bore | 0.28 in |
| Pitch Diameter | 3.35 in |
| Weight | 0.59 LB |
| EAN or UPC | 697950005102 |
