mtt.tr
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- Location
 - Essex/Suffolk border
 
Or you can start off a dead stop and engage in the same number at exactly the same bed position which is how I do metric on a imperial leadscrew.
As Pete said the answer to your question was written on your lathe instruction plate![]()
Thats how i would approach it, how dad taught me




		
 So I tried to hacksaw it and managed to put a notch in it, then I tried drilling it and that went ok.