Open Gearing


Change Gears

Boston Gear Change Gears

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 diametral pitch, for a nearly infinite number of ratio possibilities. Be sure to ask for the Boston Gear compound steel bushings designed specifically for use with these gears.

Many different gears with a variety of bore sizes, keyways, and setscrews are routinely in stock, but if the particular bore/keyway/setscrew combination needed is not readily available, our machining experts can alter any non-hardened gear and ship it within 24 hours. Just ask!

    • With 20 to 128 teeth, our change gears offer an almost infinite number of ratio possibilities.
    • 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.
    • Boston Gear's change gears are available via our Guaranteed Same Day Shipment Program to ensure timely delivery.
    Boston Gear
    701 Carrier Dr.
    Charlotte, NC 28216
    Web: CONTACT
We are now a part of Regal Rexnord.