GD77A 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 sheet: SAF Spec Sheet

Diametral Pitch: 20

Click here for spec sheet: SALF Spec Sheet

When the magnet coil is de-energized

Click here for spec sheets: CUCNPPA Spec Sheet

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

No control equipment is required

stem pinions

Click here for spec sheet: SBLF Spec Sheet

Click here for spec sheet: SUCSP Spec Sheet

Click here for spec sheets: BUCNPHA Spec Sheet

Click here for spec sheets: SUCNPPA Spec Sheet