I'd be very surprised if the motor was 480 volts only.
They are almost always at least dual voltage.

To me, the big things to look for are, not much abuse, very little 
mechanical slop in anything, good motors,
working drives if possible or if not, then reasonably priced drives 
available, a workable power cabinet (not all beat up).

That mill looks tall - might want to ask him how tall it is if you don't 
have high ceilings.

The price is right.    That looks like it was originally a CNC mill so 
it should have ball screws.

When you look at it, look for damage under the table and signs that it 
was moved improperly.

Could be a great conversion candidate.  Looks good in the pictures 
although details are hard to make out.

Dave



On 3/30/2014 11:14 AM, Jon Elson wrote:
> On 03/30/2014 08:53 AM, Peter Blodow wrote:
>> Charles, from my (German) point of view, the power at 480 Volt three
>> phase times 5 Amperes (each) times sqrt. of 3 makes some 15 HP. That's
>> what the machine label wold mean to me at the power supply standards in
>> our house. look at the power label right at the spindle motors body.
>>
>>
> Nope, 5 * 480 * 1.732 = 4156 VA.  Making assumptions for
> phase angle,
> 3 HP is not unreasonable.
>
> Jon
>
>
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