Ok i bought a second hand Hudy Lathe of e bay.

It has a Hudy drive motor but want to know what voltage i should be using for it. It has aligator clips to hook a pour source but is 12 v or a 4 cell battery.
Not sure what wind the Hudy slave motor is.

Any help much appreciated.

You want between 4 and 5 volts only.
Easy way is to clip onto a NIMH pack if you have one with side-by-side configuration, then you just clip on the battery bars.
I use an old CPU Power supply on the 5 volt rail. It's about 4.8 volts at the motor.
The speed of the motor (via input voltage) also affects the way it will cut. Too slow or too fast and you won't get a nice finish.
BTW, most lathes with slave motors are wired backwards, make sure you check which way it is running or you will kill the bit in a second!

Thank you so much for that.

I have had a lathe before but forgot about the motor direction.
You Jolted my memmory now.

As for the source i was going to run a 4 cell pack but some companies put a high wind motor in for that reason.

Thanks again.

Mark.