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Graziano Sag 12 - VFD or RPC?


Dec 15, 2020
I have been wanting a lathe for years and told my boss about it. He said that our sister company had a lathe that is not used anymore so I could buy it for $1 on the condition that I got it out of their shop.

I came home with a 2000lb Graziano Sag 12 as my first lathe. Sorta jumping in head first here.

My home shop does not have 3ph so the route to take is either a VFD or Rotary Phase Converter. I've read a ton on both sources of 3ph and used to install ABB VFDs at an old job.

My question is are there pros/cons to one source over the other specifically for the Graziano? I assume that going RPC, I would still use the clutches and speed switch the change speeds (and they can be somewhat finicky). Or the VFD would be used for speed control?

Since I paid almost nothing for the lathe, I don't mind spending up to $1000 for a RPC.

Any help or advice would be appreciated.

Picture when it was moved in:


Cast Iron
Jan 20, 2008
Cary, NC
It's always the simpler and best route to get acquainted with 3phase converters. It's one thing you need to spend on that can be reused for multiple machines and all the machine will behave as it was designed. Or in the state you got it

I am one who tried avoiding the converters and that just created more complexity. Go rotary phase converter and never look back.

Good luck


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