- Messages
- 21,651
- Reactions
- 50,315
I had wondered about that too, the using WD40. So I bought some water soluble oil that is made as cutting fluid for just this kind of work. Had to buy a quart of it which even if mixed at lowest recommended dilution is way more than I will ever need but its cheap stuff so figured why not. Figured it would have to be better for the endmill.Many Jig manufacturers recommend WD40 as a lubricant but I've switched to Tap cutting fluid, it's leaps and bounds better.