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Centering a punch mark in the 4-jaw
#1
G'day guys, wondering what method people use for centering a centre-punch mark in the lathe. I've just completed threading my new crossfeed nut, this is the technique I came up with- an old field-tipped arrow shaft held in the tailstock chuck, with the point located in the punch mark and a DTI against the arrow shaft. Worked a treat, but wondering what a more conventional method would be?
       
I had more success with the internal acme threads this time around, made a spare whilst I was at it. The above photos are setting up the second nut, which is why the boring bar with the acme tool are already set up in the toolpost whilst centering the work. 2 good threads from 3 attempts, still a good thing I'm not trying to make a living from this!
   
Lathe (n); a machine tool used in the production of milling machine components.

Milling Machine (n); a machine tool used in the production of lathe components.
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Messages In This Thread
Centering a punch mark in the 4-jaw - by Pete O - 05-11-2015, 04:44 AM
RE: Centering a punch mark in the 4-jaw - by EdK - 05-11-2015, 08:02 AM



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