I want to tap 1/4" mild steel material for 3/8-16 threads. I have to do a lot of them, and I'm wondering if I can get away with punching the 5/16" hole rather than drilling it. Of course I can just try it in a piece of scrap, but I'm wondering if there is anything I'm likely to hit, something I wouldn't think of.
Grant
Have punched and tapped several thousands of holes in 5mm HRS and cut a M 6 in it. No problem, if the hole fits. :-)
Nick
As Nick said,no problem.I`ve just finished tapping 25,000 M6 holes in
5mm plate that were punched.The newer cnc punches have tapping on the machine as an option. Mark.Farriers often hot punch shoes for screw-in calks, especially those forged from concave or half round stock. (Strangely enough, the most common threads for screw-ins is 3/8" 16t.) With very few exceptions, horseshoes forged from bar stock are seldom smaller than 1/4" or larger than 1/2" in thickness.
Cold punch> I want to tap 1/4" mild steel material for 3/8-16 threads. I have to do
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