GB69B 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

Click here for spec sheets: BUCNPPA Spec Sheet

Click here for spec sheet: UCFCS Spec Sheet

Click here for spec sheet: SALP Spec Sheet

Note: This is the spec sheet for the set screw Locking version

Interchangeable with most metal units

Provides greater axial holding power than set screw or one-piece clamping collars

a spring loaded pressure plate (magnet armature) presses against the rotating discs

UHMW-PE provides durability & low friction

Click here for spec sheet: SB Spec Sheet

Click here for spec sheet: CSB Spec Sheet

Click here for spec sheet: SA Spec Sheet

Straight tooth Miter Gears are cut with a generated “Coniflex” tooth form providing increased life and quieter operating conditions