Find a Service Center
- 12B-2 Chain Number
- 2 Strands
- 23 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
| Stock Bore Size | 20 mm |
| Construction Internal | Solid |
| Bushing Bore Size [Max] | 2.992 in |
| Hub O.D. | 4.331 in |
| Bore Style | Minimum Bore |
| Pin Diameter | 12.065 mm |
| Bore Type | Finished Bore |
| Pitch Diameter | 139.9 mm |
| Width Across Teeth | 30.33 mm |
| O.D. | 5.971 in |
| Sprocket Style | B |
| Caliper Diameter | 127.51 mm |
| Inch/Metric | Metric |
| Length Through Bore | 1.967 in |
| Single Strand Tooth Thickness | 0.428 in |
| Pitch Dia. | 5.508 in |
| Hub Length Thru | 39.13 mm |
| Outside Dia. | 151.65 mm |
| Martin No. | 12B23 |
| Hub Dia. | 110.01 mm |
| Material Internal Use | Carbon Steel |
| Width Across Teeth Rows | 1.186 in |
| No. of Strands Across | 2 |
| Bore Size [Min] | 0.787 in |
| Pitch Root Diameter | 127.8 mm |
| Series | B |
| Family Name | No. 12 - 19.050 mm Pitch - Double - Type B & C |
| Bore Range [Min] | 20 mm |
| Bushing Bore Size [Min] | 0.787 in |
| Material External Use | Steel |
| Chain Sprocket Pitch | 0.75 in |
| Chain No. | 12B, 12B-2 |
| Chain Pitch | 19.05 mm |
| No. of Teeth Rows Strands | 2 |
| Bore Range [Max] | 76 mm |
| Material | Steel |
| Chain Sprocket Number | 12B |
| No. of Teeth | 23 |
| Pitch Diameter [Min] | 139.9 mm |
| Bushing Bore [Min] | 0.787 in |
| Hardened Teeth | Without Hardened Teeth |
| Bore Size [Max] | 2.992 in |
| Outside Dia. [Min] | 151.65 mm |
| Root Diameter | 127.8 mm |
| Weight | 10.58 LB |
| EAN or UPC | 697950401430 |
