Hi, I'm drilling through some aluminum pieces that are about 3/8quot; thickI had drilled a bunch of 1/4quot; holes already, but I need to enlarge a few of them to 1/2quot;My problem is that I'll get almost all the way through, and then the bit will get stuck, and I'll have to reverseleaving behind a little flap of metal that I can't for the life of me get outThe drill just gets stuck and stops if I try to drill through it, or else it'll skip and just kinda go around that flapIs there some trick to dealing with this?Thanks!
Alum is brittle, use kerosene as a lube when drilling, slow speed negative rake on drill lip.
wish i cud help but i dont no
