Making a hole in 3/4 " brass rod ?

[chink]

That "grabbing" can really ruin a nice piece of metal or pull the drill chuck right out of it's quill (I KNOW but I'm not ready to talk about it just yet... :banghead I just picked up a set of cheap drill bits from Harbor Fright with the intent of re-purposing them just for making holes in brass and other soft metals. I used a technique similar to what Richard described. It makes a world of difference.

-Ron

To grind a drill for drilling brass hold the cutting lip against the right side of the wheel as shown in figure 5-25. Grinding the flute slightly flat, in line with the axis of the drill, greatly reduces the included angle of the cutting lip. This will give the drill a scraping action, necessary for brass, rather than the cutting action used for steel. This scraping action will prevent the tendency, that invariably occurs with drills not ground for brass, to stick in the hole being drilled. This sticking is troublesome especially when drilling through a pilot hole.

 

[Armor]

Bingo that said it all, as I had a hell of a time stop and go as a Cheap Harbor Freight set in metric, and big to get that 15/64 tube into the end of that brass rod.

Would grab and stop , shut off and start again same thing it took a long time to drill 3/4" deep.

Now I know ,and never knew before that there are special drill bits for brass.

Glad I joined here you guys really share all that knowledge , thanks for that.

Now who sells such drill bits for brass?

Jeff

 

[12bolts]

Now who sells such drill bits for brass?

Jeff,
I have never seen drill bits sold as suitable for brass. You just need to regrind as clink illustrated. You are just taking off the positive rake from the cutting lips, and bringing them back to zero or negative rake.

Cheers Phil

 

[Armor]

Thanks I guess need to learn all of the things involved ,and yes have a lathe not used yet.

To much work before the end of the year.
:angry:
Jeff