Find a Service Center
Martin
80SF21
Single Strand Sprocket; 80 Chain Size; 21 Teeth; Requires SF QD Bushing
Item #100804433
Alternate Products
US Tsubaki Inc.
80SF21
Single Strand Sprocket; 80 Chain Size; 21 Teeth; Requires SF QD Bushing
Item #101627600
- Single Strand Sprocket
- 80 Chain Size
- 21 Teeth
- Requires QD SF Bushing
- Without Hardened Teeth
features
- 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
| Outside Dia. | 7.235 in |
| Bushing Series | SF |
| Inch/Metric | Inch |
| Overall Length | 1 1/4 in |
| Bore Size [Max] | 2.938 in |
| Width Across Teeth | 0.575 in |
| Material External Use | Steel |
| Bushing Bore Size [Min] | 0.5 in |
| Material Internal Use | Carbon Steel |
| Bushing Type | QD |
| Pitch Diameter | 6.710 in |
| Caliper Diameter | 6.07 in |
| Material | Steel |
| Chain Sprocket Number | 80 |
| Hardened Teeth | Without Hardened Teeth |
| O.D. | 7.235 in |
| Chain Sprocket Pitch | 1 in |
| Pitch Dia. | 6.71 in |
| Bore Type | Bushed |
| Bushing Bore [Max] | 2 15/16 in |
| No. of Teeth | 21 |
| Length Through Bore | 1.25 in |
| Type | B |
| Screw Size | 3/8-16 UNC |
| Outside Dia. [Min] | 7.2350 in |
| Bushing Bore Size [Max] | 2.938 in |
| Hub Dia. | 4 3/4 in |
| Martin No. | 80SF21 |
| No. of Teeth Rows Strands | 1 |
| Construction Internal | Welded |
| Tooth Width | 0.575 in |
| Bushing Bore [Min] | 0.5 in |
| Overall Length Less Threads | N/A |
| Hub Length | 0.69 in |
| Hub Projection | 0.69 in |
| Chain No. | 80 |
| Bore Size [Min] | 0.5 in |
| Chain Pitch | 1.000 in |
| Single Strand Tooth Thickness | 0.575 in |
| Sprocket Style | B |
| Hub O.D. | 4.75 in |
| No. of Strands Across | 1 |
| Weight | 5.74 LB |
| EAN or UPC | 697950020792 |
