- Joined
- Oct 17, 2018
- Messages
- 922
I was drilling a 1/4" hole into what I think is 6061 aluminum plate (1/8: thick) with a standard drill bit using a little 3 in 1 oil for lube/coolant and got an entry hole that looked like this:
and an exit hole that looked like this:
I had a piece of wood underneath and the wood was burned. It was very hard to push down on the drill press.
Anybody ever seen this before? The bit is now dull, but I'm not sure if it was before I started. Is there aluminum sheet that is hard enough? This was scrap, so it wasn't labelled.
and an exit hole that looked like this:
I had a piece of wood underneath and the wood was burned. It was very hard to push down on the drill press.
Anybody ever seen this before? The bit is now dull, but I'm not sure if it was before I started. Is there aluminum sheet that is hard enough? This was scrap, so it wasn't labelled.