GB125A Cast Iron Change Gear 113 Teeth Click here for spec sheets:

Click here for spec sheets: SSER Spec Sheet

and most come with a selection of bore diameters

1/4"Bore= #6-32 setscrew

Boston Gear manufactures both 14 1/2° and 20° PA

GB125A Cast Iron Change Gear 113 Teeth Click here for spec sheets: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 diametrical pitch, for a