Counter-Sink Drill bits?

Machine Shop
#1

Hi,
Quick question, does the shop have a set of counter sink drill bits? This would be for drilling 0.325" aluminum bar. I went by this morning and looked in the cabinets and couldn’t find any, although I may have missed it.

Thanks,
Joe

#2

To be honest,I do not recall.

#3

OTOH, one is always advised that buying your own bits guarantees their sharpness. Or, at least you know the status of the sharpness…

1 Like
#4

There are some assorted countersinks in the grey cabinet . Can’t guarantee they are sharp. If you want a flat bottomed countersink, technically a counter bore, use an end mill on the Bridgeport .

#5

I found a countersink. I don’t recall the angle but I put it in the yellow case with edgefinders/small end mills to make it easier for you to find.

2 Likes
#6

There’s a bigger one in the metal shop that we used for the welding tables. Also not sure of the angle

#7

Thank you Tim. I really appreciate it.