Change Gears

Change Gears

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 diametral pitch, for a nearly infinite number of ratio possibilities.

Change Gears are primarily used in machinery where gear ratios are frequently changed. Every consecutive number of teeth are available from 20 teeth to 128 teeth (up to 200 teeth in some pitches). Change Gears are flat plain style spur gears without hubs.

A "gear-train" or series of change gears may operate together in trains of idler gears mounted on compound double keyway bushings.

Change Gears are referred to as the "G" series part numbers in the range of 20 teeth and up, each gear having the same bore, face and double keyway dimensions for a given pitch. Two gears may be assembled on a single change gear bushing to form a single compound unit.

"A" series Change Gears are furnished with smaller minimum plain bores which can be re-bored to suit varying shaft sizes. "A" series gears start at 10 teeth.

Change Gears are interchangeable with other types of Spur Gears including Internal Gears, Stem Pinions and Gear Rack.

A PA of 14 1/2° ensures smooth, quiet operation.

These change gears are available in both steel and cast iron to suit a variety of application requirements.

Compound steel bushings specifically designed for these change gears are available to maximize performance.