In article , Martin H. Eastburn
says...

I seem to recall that the feed is a slip engage type not a hard set half nut.
If both were engaged (as is on my Sheldon it is possible) the half nut would
easily win.

Trust me on this, Martin. I know what happens when both are
engaged, and the spindle starts up. It rips the right hand
leadscrew bracket off the machine.

Jim


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