GA113B 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

self-centering design with mounting flange for use in through-bored components with smaller pitch/outside diameters

Click here for spec sheet: SAPA Spec Sheet

Bronze Bearing Type

Pressure Angle: 14-1/2 Degree Pressure Angle

Click here for spec sheets: CUCTFL Spec Sheet

Click here for spec sheets: SUCNPHA Spec Sheet

Click here for spec sheets: UCFC Spec Sheet

While 20° PA is generally recognized as having a higher load-carrying capacity

Click here for spec sheets: BUCNPFCS Spec Sheet

Diametral Pitch: 12

Number of Threads: Quad Thread

Specifications