xray wrote:

On Tue, 14 Jun 2005 00:25:07 -0700, Grant Erwin
wrote:


A 50 Hz motor will run fine on 60Hz power. A 1450 nominal motor will run at 1760
rpm when you go from 50 to 60Hz. A 50Hz motor has more copper than a 60Hz motor.
Not all 60Hz motors handle 50Hz well, but the converse is OK. Good luck on that
lathe, sounds great with a DRO and all, that's a pretty high-end feature.

GWE


Thanks. Original motor rating was 1720 so I guess it will run at 2064
which seems a little fast for a big motor, but if it has lasted this
long, I guess it will likely continue.

Get out your reading glasses and a good light and clean off that motor nameplate
and have another look. It's entirely possible it may have nameplate specs for
both frequency (50/60Hz) and rpm, and that you've picked up 50Hz from one and
1720 rpm from the other. 1720 is what it will run on 60Hz power, not 50. - GWE