GF75A Cast Iron Change GearBoston 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

Click here for spec sheets: SUCNPT Spec Sheet

Click here for spec sheet: BUCTP Spec Sheet

• One Moving Part

Pressure Angle: 20 Degrees

Recessed screw head provides safety with an outside surface free of major projections

Double-taper

Ideal for space constrained areas

Recessed screw head provides an outside surface free of major projections for safety

Click here for spec sheets: BUCTPA Spec Sheet

Click here for spec sheet: SBRFB Spec Sheet

Note: Because the efficiency of a worm gear drive depends on the lead angle and number of starts on the worm

they are ideally suited for applications where normal lubrication is difficult or impossible to provide