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- 08B-3 Chain Number
- 3 Strands
- 21 Teeth
- Without Hardened Teeth
- B 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
- 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
| Pitch Diameter | 85.2 mm |
| Pitch Root Diameter | 76.7 mm |
| Bore Type | Finished Bore |
| Width Across Teeth Rows | 1.367 in |
| Chain Pitch | 12.7 mm |
| Sprocket Style | B |
| Pin Diameter | 8.509 mm |
| Material External Use | Steel |
| O.D. | 3.645 in |
| Root Diameter | 76.7 mm |
| Hardened Teeth | Without Hardened Teeth |
| Bore Range [Max] | 47 mm |
| Hub Length Thru | 47.76 mm |
| Chain Sprocket Number | 08B |
| Construction Internal | Solid |
| Length Through Bore | 2.165 in |
| Hub O.D. | 2.756 in |
| No. of Strands Across | 3 |
| Material Internal Use | Carbon Steel |
| No. of Teeth Rows Strands | 3 |
| Series | B |
| Inch/Metric | Metric |
| No. of Teeth | 21 |
| Bore Range [Min] | 12 mm |
| Single Strand Tooth Thickness | 0.284 in |
| Outside Dia. | 92.58 mm |
| Bore Style | Minimum Bore |
| Chain Sprocket Pitch | 0.5 in |
| Outside Dia. [Min] | 92.58 mm |
| Family Name | No. 08 - 12.700 mm Pitch - Triple - B |
| Bore Size [Min] | 0.472 in |
| Pitch Dia. | 3.355 in |
| Bushing Bore Size [Min] | 0.472 in |
| Material | Steel |
| Bore Size [Max] | 1.85 in |
| Caliper Diameter | 76.46 mm |
| Martin No. | 08B21 |
| Bushing Bore Size [Max] | 1.85 in |
| Stock Bore Size | 12 mm |
| Width Across Teeth | 35.05 mm |
| Bushing Bore [Min] | 0.472 in |
| Chain No. | 08B, 08B-3 |
| Pitch Diameter [Min] | 85.2 mm |
| Hub Dia. | 70 mm |
| Weight | 4.02 LB |
| EAN or UPC | 697950398181 |
