GB73B 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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• Full Torque Stop

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They are available in plastic

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These specially designed collars fit over rail assemblies on precision shafting

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high impact & abrasion

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Bearing insert is encased in non-conductive