GD120A 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

The pressure plate retracts against torque springs by magnetic force when the magnet is energized

Friction force stops and holds the motor shaft

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They are spring set and electro-magnetically released

Click here for spec sheet: NAPL Spec Sheet

Click here for spec sheet: SBLF-H4 Spec Sheet

Click here for spec sheet: SALF-H4 Spec Sheet

They are also the smoothest

And don’t forget Boston Gear’s Guaranteed Same Day Shipment program – revolutionary premium free guaranteed same day shipment for in-stock items

Spring-lid oil cap can be positioned 4 ways

Climax Series C801 Single Nut Locking Assemblies deliver a mechanical interference fit and provides a higher torque capacity over alternative keyed connections

Click here for spec sheets: SUCTPA Spec Sheet