What would you all use to put a simple 40mm through hole in 1/2 inch mild steel.
I have already use 18mm blacksmith drill to put a pilot hole in it but the end mill I was using to open it up has gone blunt after one hole.
It was in fact 37mm and I was going to use a boring head to open up the rest but failed after the first hole anyway.
I know a boring head is going to be slow and as I now need speed I am wondering if I am missing a trick.
Sadly whilst I have some 33mm drills they are 3 Morse and the mill is R8.
Suggestions please....oh I need to do 12 holes.
I have already use 18mm blacksmith drill to put a pilot hole in it but the end mill I was using to open it up has gone blunt after one hole.
It was in fact 37mm and I was going to use a boring head to open up the rest but failed after the first hole anyway.
I know a boring head is going to be slow and as I now need speed I am wondering if I am missing a trick.
Sadly whilst I have some 33mm drills they are 3 Morse and the mill is R8.
Suggestions please....oh I need to do 12 holes.