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- 80 Chain Number
- 21 Teeth
- 1 Strand
- QD Bushing
- With 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
- Hardened teeth sprockets afford longer chain and sprocket life
- Tolerances meet or exceed ANSI standards
- Manufactured of high carbon steel
- Precise machining and processes ensure consistent finish and high quality
- Chain rows are parallel and precisely spaced to increase longevity of sprocket and chain
- Bores are concentric to pitch line, minimizing run out
- Interchangeable with other manufacturers’ QD bushings
- Stocked Heat Treat
| No. of Teeth | 21 |
| Chain No. | 80 |
| Material | Steel |
| Length Through Bore | 1 1/4 in |
| Pitch Diameter | 6.710 in |
| Outside Dia. [Min] | 7.2350 in |
| Single Strand Tooth Thickness | 0.575 in |
| Bushing Bore [Max] | 2 15/16 in |
| Overall Length Less Threads | N/A |
| Type | B |
| Screw Size | 3/8-16 UNC |
| Outside Dia. | 7.2350 in |
| Hub Length | 0.69 in |
| Overall Length | 1 1/4 in |
| Bushing Series | SF |
| Inch/Metric | Inch |
| Bushing Bore [Min] | 1/2 in |
| Caliper Diameter | 6.0657 in |
| Bushing Type | QD |
| Width Across Teeth | 0.575 in |
| Hub Dia. | 4 3/4 in |
| Martin No. | 80SF21H |
| Bore Type | Bushed |
| No. of Strands Across | 1 |
| Hardened Teeth | With Hardened Teeth |
| Sprocket Style | B |
| Chain Pitch | 1 in |
| Hub Projection | 0.69 in |
| Tooth Width | 0.575 in |
| Weight | 5.76 LB |
| EAN or UPC | 697950042206 |
