GB56B Cast Iron Change Gear 4.937" ID just has eccentric locking insert

just has eccentric locking insert instead of set screw

dimensions are the same (except "z" is longer

ANGULAR DISPLACEMENT — Single 45° — Double 90°

View Catalog PageInstallation & Removal Instructions

GB56B Cast Iron Change Gear 4.937" ID just has eccentric locking insertBoston 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