Ralph,
My motors are NEMA 23, 113 mm long, with a 2-phase holding torque of 3.0 N-m.? It was certainly overkill for the cross-slide, and may be excessive for the lead screw, but I have this philosophy... I would rather have extra torque and not need it than not have enough torque and wish I had speced a bigger motor!? I bought three of these on sale, intending to use the third one for a power feed on my mill.? I have attached the spec sheet FYI.
John, I know your motors are NEMA 23 but not as long.? Do you know the torque spec for Ralph?? You have never had a torque issue that I know of, and you push your lathe to the edge of its performance envelope...
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Regards,
Charlie
New Jersey, USA