GH42A 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

• Full Torque Stop

Center Distance: 2

Heavy guage one-piece housing has rust proof plated finish

and web with spokes

Pilot bore can be opened to the nominal ID reflected in the part number

Pressure Angle: 14-1/2 Degree Pressure Angle

Keyway: No KWY or Setscrew

Click here for spec sheets: BUCNPFCS Spec Sheet

Click here for spec sheets: HUCNPT Spec Sheet

Housing is crimped together at bolt holes

Click here for spec sheets: CUCTFB Spec Sheet

3/16"Bore= #4-40 setscrew