Im trying to tap using a 1/2 tap. I drill with the 27/64 and as soon as i start the tap it locks. So that means im probably try to tap hardened steel. I cant for the life of me to get it going so i have been tapping using a 15/32 drill. I tap it with success. Is there an easy way to tap hardened steel?
Also im tapping the holes and using a nut threaded on first. Then thread the bolt in the hole as far as it will go and then tightened the nut. I am correct as the nut will take the brute force of the impact correct.
I am not a machinist.