Bar Round
Bar Round

what is the best procedure for drilling a 5mm dia through hole in a10mm dia round bar 100mm long, mild steel.?
Quantity-10k/day. please suggest feed,drill rpm.What type of drill to be used, is it possible on a vertical drilling machine?
Hi
You are going to need a very special machine for this sort of work. You will need something in the line of a multi spindle machine. With a six station machine you can drill the stock as a peck drill in the first four positions, cut off in the fifth, and feed in the sixth.
http://www.youtube.com/watch?v=HUGh0CoanDo&feature=related
You might also want to look into buying seamless tubing with the right diameter and through hole. Then the only operations that you would have would be cut-off and deburr.
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