Find a Service Center
- 12 Diametral Pitch
- 20 Teeth
- 14.5 ° Pressure Angle
- 1.667" Pitch Diameter
- 1" Nominal Bore
description
- Boston Gear change gears are used primarily on machine tools to provide different cutting speeds while using a constant speed input. All Boston Gear change gears are manufactured with a double key to accept the compound steel bushings that connect two gears together, allowing them to spin on an intermediate shaft. The change gears we stock range from 20-tooth through 128-tooth gears, in one tooth increments, depending upon the diametrical pitch, for a nearly infinite number of ratio possibilities.
| Pressure Angle | 14 1/2 degrees |
| Material | Steel |
| Pitch Dia. | 1.667 in |
| Bore Size | 1 in |
| Bushing Series | Ga |
| Torque at 900 RPM | 178 lb/in |
| No. of Teeth | 20 |
| No. of Teeths | 20 |
| Face Width | 0.75 in |
| Outside Dia. | 1.83 in |
| Set Screw | None |
| Hardened Teeth | Without Hardened Teeth |
| Torque at 600 RPM | 205 lb/in |
| Torque at 1800 RPM | 127 lb/in |
| Bore Dia. | 1 in |
| Torque at 200 RPM | 257 lb/in |
| Keyway | Double Keyway 180° Apart |
| Hub Dia. | N/A |
| Pitch Diameter | 1.667 in |
| O.D. | 1.83 in |
| Diametral Pitch | 12 |
| Torque at 1200 RPM | 157 lb/in |
| Rated Torque [Max] | 127 @ 1800 rpm |
| Length Through Bore | 0.75 in |
| Torque at 300 RPM | 215 lb/in |
| Weight | 0.301 LB |
| EAN or UPC | 781711101421 |
