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Turret mill

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Meh I looked at it.

I bid on it but did not feel I want to go for more.

The machine has a two speed 380v motor - so replacing it is out of question. It should run fine at 440v at 60Hz.

DRO is broken.

I considered fixing it a bit and trying to sell for $2000 with maybe initial list of 2500. It would be a hard sell given the voltage. I have single phase transformer needed but not 3ph one.
 
Just curious. Is a 380V motor of that era & bolt pattern miles more difficult to retrofit a suitable power 3-phase motor for retrofit? Need to add VFD of course, but I mean just the motor aspect itself? ps - the blue handle makes me very suspicious LOL
 
Tom Kitta said:
Meh I looked at it.

I bid on it but did not feel I want to go for more.

The machine has a two speed 380v motor - so replacing it is out of question. It should run fine at 440v at 60Hz.

DRO is broken.

I considered fixing it a bit and trying to sell for $2000 with maybe initial list of 2500. It would be a hard sell given the voltage. I have single phase transformer needed but not 3ph one.
Click to expand...
That motor has to be replaceable with a 220/440v 3 phase motor, no?

I wont be surprised to see it listed on Chris Wood's (The Calgary Flipper) FB Marketplace very soon...
 
PeterT said:
Just curious. Is a 380V motor of that era & bolt pattern miles more difficult to retrofit a suitable power 3-phase motor for retrofit? Need to add VFD of course, but I mean just the motor aspect itself? ps - the blue handle makes me very suspicious LOL
Click to expand...

I agree. Not really that hard to make a motor adapter plate. In fact even possible to make a double plate that positions the business end of the motor in the same place. Biggest issue is often the length and diameter of the motor shaft.
 
Susquatch said:
I agree. Not really that hard to make a motor adapter plate. In fact even possible to make a double plate that positions the business end of the motor in the same place. Biggest issue is often the length and diameter of the motor shaft.
Click to expand...

No. Its a TWO SPEED motor not two voltage motor.

It switches from being a two pole to four pole motor and has two speed ranges - in EU its 1200 and 2500 rpm.

Its similar concept to Swidish drill press.

So next to impossible to replace apples for apples.

Come to think of it I should have replaced with single speed 1700 RPM motor and cut half of the speeds off - and then offer a VFD to get the other speeds.... BUT many people would see this solution a bit of a Frankenstein mill.

The frame is also not very popular - 100L - so yeah adapter plate and stuff...

Rest of the mill was not in so good of a shape as well - it would be just great for someone that uses EU stuff and already has European connectors - the member where we have meetings every year - he has Euro plugs and the mill came with Euro plug.

Oh and a switch from two speed to one speed motor and different voltage means almost certainly all electrical needs to be replaced or at least modified. Lots and lots of work. Its a project!

Chris may try to flip it but it will be hard - he is NOT into fixing or modifying machines.
 
Tom Kitta said:
No. Its a TWO SPEED motor not two voltage motor.

It switches from being a two pole to four pole motor and has two speed ranges - in EU its 1200 and 2500 rpm.

Its similar concept to Swidish drill press.

So next to impossible to replace apples for apples.
Click to expand...

I guess that depends on your electrical skills. I agree it's not apples for apples, but I didn't mean to imply that it ever was. For me the mechanical issues are usually harder to deal with.

Is this easy? No.

Is this doable? Yes.
 
Hmm, maybe a 3400 rpm motor, VFD speed control, with the belt change already on it, possibly any realistic speed you wanted. Note I have no idea what a 3 hp, 3400 rpm motor and VFD for it is worth at this time. But an idea, (maybe).
As to the electrical, it appears a lot of it is for the DRO and the power feed on the table, step down to 110volt and ? for DRO, mag starter for 3hp motor. Doable, but then I am not an electrician either.
And another project, oh, I get paid for what I know, which is not much based on my pension! The things dreams are made of! Dam, another nitemare!
Apples for apples, never, throw the whole fruit basket at it if needed!
 
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The trick would be finding a 3400rpm 3 phase motor with the right frame designation which would provide both the bolt mounting to the top of the mill AND teh right shaft length/diameter.
 
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