SFM vs RPM

I told @rustin.atkeisson I’d get him a copy of this, but why should he get to hold all the secrets, right? This is a chart I put together many years ago so I didn’t have to do the math on the fly. I had this hanging above my lathe for a long time. Hopefully somebody else finds it useful.sfm vs rpm.pdf (133.5 KB)

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In case anyone besides me is curious as to what sfm is

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