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- Cast Iron Material
- 85 Teeth
- 20 Diametral Pitch
- 4.35 in Outside Diameter
- 14.5 Pressure Angle
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.
| Diametral Pitch | 20 |
| Hub Dia. | 1.69 in |
| No. of Teeths | 85 |
| Torque at 200 RPM | 127 lb/in |
| Hardened Teeth | Without Hardened Teeth |
| Pitch Diameter | 4.25 in |
| Keyway | Double Keyway 180° Apart |
| Torque at 300 RPM | 112 lb/in |
| Torque at 1200 RPM | 54.3 lb/in |
| Face Width | 0.375 in |
| Set Screw | None |
| Outside Dia. | 4.35 in |
| Length Through Bore | 1 in |
| Torque at 1800 RPM | N/A |
| Rated Torque [Max] | 83.2 @ 600 rpm |
| O.D. | 4.35 in |
| Bore Dia. | 0.625 in |
| Torque at 600 RPM | 82.7 lb/in |
| Pitch Dia. | 4.25 in |
| No. of Teeth | 85 |
| Bushing Series | None |
| Pressure Angle | 14 1/2 degrees |
| Bore Size | 0.625 in |
| Material | Cast Iron |
| Weight | 0.801 LB |
| EAN or UPC | 781711108703 |
