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The best finish work also comes out better on a lath with a 3-phase motor.
Single phase 120 and 240 V motors just do not produce as smooth a cut.
If you do not have access to 3-phase to run the lathe, a variable frequency drive running from single phase 240 V provides an excellent source of 'created' 3-phase even if you do not need the VFD function.
VFDs have limits when operated from 240 V single phase, but anything short of full industrial cuts should be fine.
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