Device for opening external threads on the mini lathe.
Creative idea; if handled carefully. Bobble reversing and bottom out on the jaws, things will go south quickly.
I'd make your die holder floating like common on turret lathes, and drill a port from top to center line to dispense cutting oil. The floating holder would use studs and nuts instead; WAY easier to remove than a sheared screw. Adapt a tap holder, this should work just as well.
Only issue harder to quantify is the footprint, not rectangular like a tailstock or most lathe carriages, making axial alignment difficult.
Last edited by Toolmaker51; 06-03-2020 at 09:05 PM.
...we'll learn more by wandering than searching...
olderdan, I agree. Also the tailstock die holder solution with my MT3 taper has been more forgiving for me for potential crashes when cutting at higher speeds. The whole MT and die cutter holder is pulled out of the tailstock and just spins without a crash. Unfortunately this event is more annoying because the cut thread is three turns too short and have jam the MT end back into the tailstock for a final pass. Most of my 16+ mm diameter threads are single point threaded on the gear-head lathe and followed up with a finishing metric die. After changing a stud gear and cutting metric threads on my Imperial lathe it is a pain in going in reverse with the half nut engaged. I have done it before releasing the half nut but have to watch very closely when to engage the half nut on the next cut.
Paul Jones (06-05-2020)
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