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- 20B-1 Chain Number
- 1 Strand
- 57 Teeth
- Without Hardened Teeth
- C 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
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
- Bores are concentric to pitch line, minimizing run out
- Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
| Root Diameter | 557.3 mm |
| Caliper Diameter | 557.08 mm |
| Hardened Teeth | Without Hardened Teeth |
| Bore Type | Reborable |
| Pitch Diameter [Min] | 576.4 mm |
| Pitch Diameter | 576.4 mm |
| Pitch Root Diameter | 557.3 mm |
| Series | C |
| Inch/Metric | Metric |
| Width Across Teeth | 18.59 mm |
| Pin Diameter | 19.05 mm |
| Sprocket Style | C |
| Bore Style | Minimum Bore |
| Hub Length Thru | 63.41 mm |
| Chain Pitch | 31.75 mm |
| Martin No. | 20C57 |
| Family Name | No. 20 - 31.750 mm Pitch - Single - Type B & C |
| Material | Steel |
| Outside Dia. [Min] | 596.99 mm |
| Chain No. | 20B, 20B-1 |
| Length Through Bore | 81.99 mm |
| No. of Strands Across | 1 |
| Bore Range [Max] | 106 mm |
| Single Strand Tooth Thickness | 18.59 mm |
| Outside Dia. | 596.99 mm |
| No. of Teeth | 57 |
| Bore Range [Min] | 40 mm |
| Hub Dia. | 151.99 mm |
| Weight | 84.87 LB |
| EAN or UPC | 697950404622 |
