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- 28B-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
| Pitch Diameter | 298.24 mm |
| Hub Dia. | 133.35 mm |
| Inch/Metric | Metric |
| Chain Pitch | 1.75 in, 44.45 mm |
| Hub Projection | 22.81 mm |
| No. of Teeth | 21 |
| Hardened Teeth | With Hardened Teeth |
| Outside Dia. [Min] | 325.86 mm |
| Width Across Teeth | 29.44 mm |
| Bore Type | Bushed |
| Hub Length | 22.81 mm |
| Chain No. | 28B |
| Overall Length | 50.8 mm |
| Caliper Diameter | 269.46 mm |
| Bushing Bore [Max] | 76.2 mm |
| Length Through Bore | 50.8 mm |
| Outside Dia. | 325.86 mm |
| Bushing Type | Taperlock |
| Bushing Bore [Min] | 23.81 mm |
| Root Diameter | 270.3 mm |
| Bushing Series | 3020 |
| Overall Length Less Threads | N/A |
| Material | Steel |
| No. of Strands Across | 1 |
| Type | B |
| Sprocket Style | B |
| Weight | 29.48 LB |
| EAN or UPC | 697950412139 |
