Hi everyone. I have a nut machine. It was made in China. It is 50 Hz. Single phase ,4 hp ,240 volts, 15.05 amps, 1440 rpm , class f. It runs to fast when conected to 60 Hz, and the amps go up to 25. Gets hot fast. How can I get it to the right speed at 60 Hz as if it was running at 50 Hz. One idea is to go with a smaller sprocket, but the amps stays to high. Could I change the motor, and what hp would that be? I would really appreciate some help on this. Thanks

 

It runs to fast when conected to 60 Hz, and the amps go up to 25

I understand why it runs faster, but I don't see why the current goes up, unless the higher speed increases the load.
But then the amps should go back down with a smaller sprocket (with about 17% fewer teeth), which maintains the same chain speed.

Normally a 50Hz motor should be fine at 60Hz, except for the higher speed.

 

Class F is good for up to 155°C.
That is Hot !