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What is a spline shaft?
Aug 08, 2018

A spline shaft has cogs cut into it so it acts as a gear when turned. Often the spline is cut only into the end of the shaft, so only the end will couple another gear, leaving much of the shaft smooth to accommodate bearing.

Spline shafts are often half of a coupling, where the other half is a reverse-spline. Such couplings can allow for changing shaft length under torque.

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