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- 20 Diametral Pitch
- 90 Teeth
- 14.5 ° Pressure Angle
- 4 1/2" Pitch Diameter
- 5/8" 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.
| Torque at 600 RPM | 85.4 lb/in |
| Pitch Diameter | 4.5 in |
| Rated Torque [Max] | 85.4 @ 600 rpm |
| Length Through Bore | 1 in |
| Hardened Teeth | Without Hardened Teeth |
| Pressure Angle | 14 1/2 degrees |
| No. of Teeth | 90 |
| Hub Dia. | 1.69 in |
| Material | Cast Iron |
| Torque at 200 RPM | 133 lb/in |
| Pitch Dia. | 4.5 in |
| Torque at 300 RPM | 117 lb/in |
| Face Width | 0.375 in |
| Set Screw | None |
| Bushing Series | None |
| Keyway | Double Keyway 180° Apart |
| Torque at 1800 RPM | N/A |
| Diametral Pitch | 20 |
| O.D. | 4.6 in |
| Outside Dia. | 4.6 in |
| Bore Dia. | 0.625 in |
| No. of Teeths | 90 |
| Torque at 900 RPM | 67.2 lb/in |
| Bore Size | 0.625 in |
| Torque at 1200 RPM | N/A |
| Weight | 0.901 LB |
| EAN or UPC | 781711108802 |
