Find a Service Center
- 20B-1 Chain Number
- 1 Strand
- 29 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
- 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
- Manufactured of high carbon steel
| Bore Style | Minimum Bore |
| Series | A |
| Chain Pitch | 31.75 mm |
| Root Diameter | 274.6 mm |
| Length Through Bore | 18.59 mm |
| Chain No. | 20B, 20B-1 |
| Pin Diameter | 19.05 mm |
| Single Strand Tooth Thickness | 18.59 mm |
| Pitch Root Diameter | 274.6 mm |
| No. of Teeth | 29 |
| Hardened Teeth | Without Hardened Teeth |
| Sprocket Style | A |
| Inch/Metric | Metric |
| Hub Dia. | N/A |
| Family Name | No. 20 - 31.750 mm Pitch - Single - A |
| Caliper Diameter | 274.18 mm |
| Hub Projection | N/A |
| Outside Dia. [Min] | 314.3 mm |
| Bore Range [Max] | 263.7 mm |
| Width Across Teeth | 18.59 mm |
| Outside Dia. | 314.3 mm |
| Martin No. | 20A29 |
| No. of Strands Across | 1 |
| Bore Type | Reborable |
| Bore Range [Min] | 32 mm |
| Material | Steel |
| Pitch Diameter | 293.7 mm |
| Pitch Diameter [Min] | 293.7 mm |
| Hub Length Thru | N/A |
| Weight | 20.79 LB |
| EAN or UPC | 697950404073 |
