GF36B 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

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When the magnet coil is de-energized

non-metallic

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

Can be mounted vertically or horizontally

a spring loaded pressure plate (magnet armature) presses against the rotating discs

Its proven modular design has set the industry standard for performance and is the most imitated product in today's worm gear speed reducer market

Boston Gear manufactures both 14 1/2° and 20° PA