CK5
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Grinder Project
- Thread starter m4
- Start date
trav0302
1/2 ton status
WOW thats a huge BIT**!
TheBeast_88K5
Banned
Yes... Yes, it is...
GMC1977
1/2 ton status
i pulled one just like that out of an old building at my work. i was mounted on a heavy ass stand and wired directly into the panel. a co worker took it home to kemp. would be funny if it was the same one.
I've seen and used ones similar to that, that had the longer shaft on both ends, for metal polishing. In looking at the threaded ends on the shafts, it appears that this one is setup for polishing. The ones I had experience with were 240V 3 phase. Is there any kind of stop/start switch or an electrical box?
No box or switch was provided, and it only has three wires exiting the motor, so that rules out three phase.
Yep, gotta be 240V single phase then. So no legible info on the motor tag?
Actually it could still be 3 phase.
Not all 3 phase appliances have a ground, and some use the body as ground.
Try and ressearch it more or, open it up, you will know right away is it's 3 phase or single.
That thing is gonna be bad ass. Looking forward to seeing the completed resto. Love old iron.
CGT80
1/2 ton status
x2 on the 3 phase
You could run a VFD on it. I bought a 1hp VFD for a 1/2hp baldor 3 phase grinder that I picked up for free. The VFD was $120 and it lets you control the speed of the motor among other things. It was well worth it for me since my grinder retails for around $500 new.
There should be more leads off the motor. You would need 6 out of the motor and then they will be connected in pairs to your 3 line wires from your panel.
You could run a VFD on it. I bought a 1hp VFD for a 1/2hp baldor 3 phase grinder that I picked up for free. The VFD was $120 and it lets you control the speed of the motor among other things. It was well worth it for me since my grinder retails for around $500 new.
There should be more leads off the motor. You would need 6 out of the motor and then they will be connected in pairs to your 3 line wires from your panel.
CGT80
1/2 ton status
That's a bummer. Maybe someone will know how to properly check the motor to see what voltage it is for. Or, if there are any motor repair shops near you, maybe they could give you some info on it.
I received this from the Practicial Machinist forum.
If that's a 3 phase motor then there should be a few ohms reading between each lead. If there is only one pair that shows connectivity of a few ohms (a winding) then check to see if the third wire is shorted to the machine case. If so it's single phase.
If that's a 3 phase motor then there should be a few ohms reading between each lead. If there is only one pair that shows connectivity of a few ohms (a winding) then check to see if the third wire is shorted to the machine case. If so it's single phase.
CGT80
1/2 ton status
That's basically what I was thinking. Also, if one is a ground, how do you tell if it is 120v or 250v single phase?
I'll have to look when I get back in town, but I don't remember seeing a wire grounded to the case.
All three wires have ohm reading, two wires go into a winding and the third goes around and into another winding. I can make out 240v on the tag, I don't know if it's single or three phase 240v, never seen a three phase motor with only three wires.
All three wires have ohm reading, two wires go into a winding and the third goes around and into another winding. I can make out 240v on the tag, I don't know if it's single or three phase 240v, never seen a three phase motor with only three wires.
I have and that is why I said it was a 3 wire.
Typically in a perfect world, you only need 3 wires for 3 phase, neutral is not needed in some cases, a motor being one.
As long as all three legs have the same resistance you don't need the neutral.
I would ground the case though for safety.
The neutral is only to return the left over from the difference in consumption between the phases.
I put it all together today and put three phase power to it, runs just find. Thanks all.
http://s228.photobucket.com/albums/ee137/3CL1/?action=view¤t=002.mp4
http://s228.photobucket.com/albums/ee137/3CL1/?action=view¤t=002.mp4
