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- 20B-1 Chain Number
- 21 Teeth
- 1 Strand
- Taper Lock Bushing
- Without Hardened Teeth
description
- Hardened teeth on the smaller sprocket of a roller chain drive are recommended if the drive ratio is four to one or greater or if the smaller sprocket has 24 teeth or less and is running at a speed of over 600 rpm.
features
- Tolerances meet or exceed ISO standards
- 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
- Interchangeable with other manufacturers’ taper bushings
| Inch/Metric | Metric |
| Chain No. | 20B |
| Type | B |
| Material | Steel |
| Chain Pitch | 1.25 in, 31.75 mm |
| Outside Dia. [Min] | 233.66 mm |
| Root Diameter | 193.98 mm |
| No. of Strands Across | 1 |
| Caliper Diameter | 193.38 mm |
| Pitch Diameter | 213.03 mm |
| Length Through Bore | 44.45 mm |
| Bushing Bore [Max] | 57.15 mm |
| Overall Length Less Threads | N/A |
| No. of Teeth | 21 |
| Hub Length | 26.14 mm |
| Bushing Series | 2517 |
| Hub Dia. | 106.76 mm |
| Hub Projection | 26.14 mm |
| Outside Dia. | 233.66 mm |
| Sprocket Style | B |
| Hardened Teeth | With Hardened Teeth |
| Width Across Teeth | 18.59 mm |
| Bushing Bore [Min] | 12.7 mm |
| Overall Length | 44.45 mm |
| Bore Type | Bushed |
| Bushing Type | Taperlock |
| Weight | 4.5 LB |
| EAN or UPC | 697950411460 |
