I'd been having problems drilling 1/2 inch thick steel on a
drill press. Only about 1/4 inch deep the 1/2" HSS drill bit
would seize or glaze the steel and will cease to drill any
further.
The drills were sharpen with diamond disc and sharpen
keen to the tip finishing with a 400 grit diamond. Should I
be using cutting oil, coolant or a different type of drill bit?
Thanks
- posted
18 years ago