As a general rule the body of the tapping attachment is mounted in some way to prevent rotation while allowing up and down motion.
It is usually mounted in a drill press.
In the interior are cone clutches. Push down into the work and it will feed a tap. Pull up and the direction of the tap will reverse as well as speed up to allow quicker tap removal from the work.
George
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
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