- Joined
- Jan 8, 2015
- Messages
- 202
This is probably a stupid question, but if I find the answer I'll be gratful and a little less stupid.
I've run into and issue drilling 5160. It's all annealed new steel, but when I attempt to drill 1/4" holes I get varying results. Sometimes it cuts like butter and other times I drill about a 1/16" of an inch and it acts like it's hardened. I've even moved to another part of the same piece of steel and drilled right through it. I've drilled 1084, and 1095 and old annealed files with no issue. The only other time I run into this is with leaf spring. I'm running my current drill press as slow as it will go. Off hand I'm not sure of the speed. I'm using cutting oil. Is the steel hardening as I drill?
I've run into and issue drilling 5160. It's all annealed new steel, but when I attempt to drill 1/4" holes I get varying results. Sometimes it cuts like butter and other times I drill about a 1/16" of an inch and it acts like it's hardened. I've even moved to another part of the same piece of steel and drilled right through it. I've drilled 1084, and 1095 and old annealed files with no issue. The only other time I run into this is with leaf spring. I'm running my current drill press as slow as it will go. Off hand I'm not sure of the speed. I'm using cutting oil. Is the steel hardening as I drill?