GD56B 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

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-60° to 180° F temperature range

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Self-lubricating ideal for wet or harsh environments where wash down is required

While 20° PA is generally recognized as having a higher load-carrying capacity

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

Recessed screw head provides an outside surface free of major projections for safety

These unique two-piece rigid clamping couplings come with an undersized ID

• Double C-Face