GB75B 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

allowing them to spin on an intermediate shaft

They are spring set and electro-magnetically released

Click here for spec sheet: SALP Spec Sheet

Design fully engages the thread for secure locking

B-Type Seals

Click here for spec sheets: BUCTF Spec Sheet

worms and worm gears operating together must have the same diametrical pitch and threads

stem pinions

Click here for spec sheets: BUCTFB Spec Sheet

the CUCST has a Hard Chrome bearing insert and a Stainless Steel housing

Be sure to ask for the Boston Gear compound steel bushings designed specifically for use with these gears

Click here for spec sheets: SUCNPPA Spec Sheet