What is a SUB SPINDLE contained by CNC LATHE?

Answers:
Typically, a sub-spindle is a second spindle on the opposite side of the cutting tools from the leading spindle, permitting a short workpiece to be machined on both ends. The first end of a workpiece is machined while held by the major spindle, then the workpiece is automatically transferred to the sub-spindle and the other end is machined while held by the sub-spindle.

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