- Joined
- Nov 25, 2015
- Messages
- 8,379
The other night I had a conversation with a friend. He's a gunsmith, his dad was a machinist. We were talking about my mill.
He said I should not use SAE 20 for the 8520, that I should use non-detergent 30 wt oil, that detergent will corrode the mill. This I believe to be true, but just checking is he correct.
in relation to both mill and lathe
He said to forget the expensive cutting oils. I have been using tap magic for AL, and Oatley dark for steels. Some times if I have a difficult to cut stuff and have tried gear oil to get a cut and it's been a help. Not sure why, just tried it.
Anyway for the AL he said only use kerosene, which is cheaper. I have known guys saying that, so not that far off.
The old motor oil surprised me. He said used motor oil cuts better than the normal chlorinated cutting oils. Aside from the stink of having used motor oil around, is this right? Anyone here feel the same way?
Next project, I'll give it a try.
He said I should not use SAE 20 for the 8520, that I should use non-detergent 30 wt oil, that detergent will corrode the mill. This I believe to be true, but just checking is he correct.
in relation to both mill and lathe
He said to forget the expensive cutting oils. I have been using tap magic for AL, and Oatley dark for steels. Some times if I have a difficult to cut stuff and have tried gear oil to get a cut and it's been a help. Not sure why, just tried it.
Anyway for the AL he said only use kerosene, which is cheaper. I have known guys saying that, so not that far off.
The old motor oil surprised me. He said used motor oil cuts better than the normal chlorinated cutting oils. Aside from the stink of having used motor oil around, is this right? Anyone here feel the same way?
Next project, I'll give it a try.