#08-081 Using a Drill Press to Cut Plate Holes

[KevinMillard68]

titanium bits can be sharpened just fine, so an the zirconium bits as well. your also supposed to use cutting or tapping fluid when drilling any kinds of steel,drilling steel and stainless steel 450 rpm is fine with cutting fluid.. without then you go 300 or slower if you can.but you should still use cuttting or tapping fluid on slower rpms as well..

[eddiequest2]

shoot that dog

[crumbfish]

Dont waste your time with that drill bit. Get a unibit or step bit. Won't leave a burr or at least a way smaller burr than that drill bit. Also use a good cutting fluid. WD40 will work in a pinch. If you still need to deburr, get a regular roto deburring tool from a machine supply house. Or even a countersink mounted in a handle. That file will take you forever and a day.

[raypsi]

Must have someing to do with the step and increased diameter being tapered. The first step goes really fast. So when I start with a 3/16 hole then goes to 1/4 then 5/16 then 3/8 I think because the heat gets sinked by the overall size of the bit. It lasts longer. I don't buy titanium at all you are right there those are throw away bits one time use. $27 for my stepped bit replaces 3/16 to 1 inch in 1/16 steps that's like 13 bits.

[raypsi]

I like a unibit or stepped bit that goes from 3/16 up to 1 inch and the sweet part is the burs ccme off with the next step on the bit no filing for me. And unibits aren't cheap either.

[charlieehler]

I know they aren't cheap. I didn't think they were made in colbalt or HHS, so how does it hold up for you?

Charlie Ehler