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DIY Tailstock for Homemade Wood Metal Mini Mill Lathe

A tailstock is a device often used as part of an engineering lathe, wood turning lathe, or used in conjunction with a rotary table on a milling machine.

Homemade mini Milling DIY X Y Z Slide CNC Drill Home Built Lathe Router Machine
It is usually used to apply support to the longitudinal rotary axis of a workpiece being machined. A lathe center is mounted in the tailstock, and inserted against the sides of a hole in the center of the workpiece. A tailstock is particularly useful when the workpiece is relatively long and slender. Failing to use a tailstock can cause chatter where the workpiece bends excessively while being cut.

More Step by Step Homemade Mini Lathe DIY Wood Milling CNC Router here:

It is also used on a lathe to hold drilling or reaming tools for machining a hole in the work piece. Unlike drilling with a drill press or a milling machine, the tool is stationary while the workpiece rotates. Holes can only be cut along the axis that the workpiece is set to spin.