Newbie Help Please with Motor Conversion

[Dezmond]

Hey Everyone!!!

I have the chance to buy a older model Bridgeport mill for a GREAT price. Problem is that the motor on it is rated at 3 phase 575 volt.

I have a little shop that only has 220 volt single phase in it.

I got quotes on re-winding the motor to 220 3ph and a VFD but MAN it costs more than the price of the mill.

Can I just make a new mounting plate and just mount a 110 or 220 volt motor on there? say a 2 or 3hp? Since the speed is variable by clutches in this model I would have to worrie about speed control correct? It has the dial on the front...

Any help would be great.. I hope to get this up and running soon to get back into the great machining hobby again.

Thanks Everyone...

[M250cnc]

To change the motor you would also have to change all the control gear on the mill

The cheapest option is a rotary phase converter i use one in my shop i can run up to three machines at a time

Phil

[Dezmond]

Where did you get your phase converter? Are these expensive?

[mactec54]

Dezmond

Is this just a manual mill, if it is try Ebay for a 220V Bridgeport motor,You has a variable speed drive,So you will have to get the Bridgeport motor, It has a special shaft on it for the variable speed pulleys

For VFD drives Ebay again,Will get you the best deal, Try the Drive Warehouse

[Dezmond]

Also why would I have to change gear controls etc? I though this motor was attached to a pulley and belt. I figured we could mill the pullry to the new shaft and key and bushing if needed...

Just trying to figure this out to the cheapest method

[mactec54]

Dezmond

You only have to change the motor if it is a manual mill, The shaft on the motor is about
6" long, You would have a hard job to put a standard motor on it, the shaft on the motor is also hardened

The photo will give you a better idea

[Dezmond]

Hmmmmm. Why not weld to the shaft and turn it tru again on a lthe and then all set. Should I go to a bigger motor as well? say 3hp

[M250cnc]

Control Gear as in the electronics or at least rewiring as they will be the wrong voltage.

Phil

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