GB78B Cast Iron Change Gear 2-1/8" Provides greater axial holding power

Provides greater axial holding power than set screw collars

dimensions are the same (except "z" is longer

Max V Value: 300 fpm

depending upon the diametrical pitch

GB78B Cast Iron Change Gear 2-1/8" Provides greater axial holding powerBoston 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