GA98B 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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self-centering design with mounting flange for use in through-bored components

web with lightening holes

Pilot bore can be opened to the nominal ID reflected in the part number

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No control equipment is required

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depending upon the diametrical pitch

ISO Certificate

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Click here for spec sheet: CSA Spec Sheet