Find a Service Center
- 20B-2 Chain Number
- 2 Strands
- 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
| Chain Pitch | 31.75 mm |
| Bore Style | Minimum Bore |
| Pin Diameter | 19.05 mm |
| Outside Dia. [Min] | 596.99 mm |
| Pitch Diameter [Min] | 576.4 mm |
| Chain No. | 20B, 20B-2 |
| Material | Steel |
| Hub Length Thru | 108.81 mm |
| Caliper Diameter | 557.08 mm |
| Series | C |
| Martin No. | 20C57 |
| Inch/Metric | Metric |
| Sprocket Style | C |
| Hardened Teeth | Without Hardened Teeth |
| Root Diameter | 557.3 mm |
| Pitch Root Diameter | 557.3 mm |
| Width Across Teeth | 54.64 mm |
| Bore Range [Min] | 40 mm |
| Bore Range [Max] | 134 mm |
| Single Strand Tooth Thickness | 18.19 mm |
| Outside Dia. | 596.99 mm |
| No. of Strands Across | 2 |
| Bore Type | Reborable |
| Length Through Bore | 127 mm |
| Pitch Diameter | 576.4 mm |
| Family Name | No. 20 - 31.750 mm Pitch - Double - Type B & C |
| No. of Teeth | 57 |
| Hub Dia. | 190.98 mm |
| Weight | 141.31 LB |
| EAN or UPC | 697950405148 |
