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- 20B-3 Chain Number
- 3 Strands
- 27 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
| Bore Style | Minimum Bore |
| Chain Sprocket Pitch | 1.25 in |
| Martin No. | 20B27 |
| Length Through Bore | 4.725 in |
| Chain No. | 20B, 20B-3 |
| Hardened Teeth | Without Hardened Teeth |
| Bore Type | Finished Bore |
| Construction Internal | Welded |
| Hub Length Thru | 127 mm |
| Stock Bore Size | 32 mm |
| Bore Range [Max] | 102 mm |
| Hub Dia. | 145.01 mm |
| Pitch Root Diameter | 254.4 mm |
| Pitch Diameter [Min] | 273.5 mm |
| Outside Dia. [Min] | 294.13 mm |
| Chain Pitch | 31.75 mm |
| Material External Use | Steel |
| Bushing Bore [Min] | 1.26 in |
| Sprocket Style | B |
| Chain Sprocket Number | 20B |
| Outside Dia. | 294.13 mm |
| Pitch Diameter | 273.5 mm |
| Bore Range [Min] | 32 mm |
| No. of Teeth | 27 |
| Bore Size [Max] | 4.016 in |
| Bushing Bore Size [Max] | 4.016 in |
| No. of Teeth Rows Strands | 3 |
| Caliper Diameter | 253.98 mm |
| Material | Steel |
| Bushing Bore Size [Min] | 1.26 in |
| Inch/Metric | Metric |
| Hub O.D. | 5.709 in |
| Bore Size [Min] | 1.26 in |
| Width Across Teeth | 91.08 mm |
| Root Diameter | 254.4 mm |
| Series | B |
| Pitch Dia. | 10.767 in |
| Width Across Teeth Rows | 3.576 in |
| Pin Diameter | 19.05 mm |
| No. of Strands Across | 3 |
| Family Name | No. 20 - 31.750 mm Pitch - Triple - Type B & C |
| O.D. | 11.58 in |
| Single Strand Tooth Thickness | 0.716 in |
| Material Internal Use | Carbon Steel |
| Weight | 79.14 LB |
| EAN or UPC | 697950405353 |
