I have a LMS 7x16 lathe and having an issue I cant figure out, total newb here. Often when I face 6061 alum, when the tool gets toward the center it wants to "grab" and pull down on the tool gouging the work.
For instance today I am am facing 3" round cutting about .010". I start off the outer section at about 650 RPM, which cuts nicely, and as I move toward the center I increase the RPM. At about 1" from center I have it up to about 1800 RPM, but thats where it starts this grabbing thing.
I suspect maybe I need to cutting faster that 1800 RPM? I can never find a calculator for facing, only turning. Is turning the same as far as speeds go? Is .010 too aggressive for a lightweight mill like mine?
For instance today I am am facing 3" round cutting about .010". I start off the outer section at about 650 RPM, which cuts nicely, and as I move toward the center I increase the RPM. At about 1" from center I have it up to about 1800 RPM, but thats where it starts this grabbing thing.
I suspect maybe I need to cutting faster that 1800 RPM? I can never find a calculator for facing, only turning. Is turning the same as far as speeds go? Is .010 too aggressive for a lightweight mill like mine?
Comment