Converting a 3 phase surface grinder to single phase?

[Dan Seaver]

I found a surface grinder at an unbeatable price two hours from me, but I'm almost positive its three phase.

I was thinking of switching it to single phase with a phase converter... but, Would a phase converter cause problems for the electromagnet (chuck)?

Any help would be appreciated.

Thanks
-Dan

 

[Don Hanson III]

Dan, my old surface grinder has a belt drive, so I just put a single phase motor on it. Most have a motor that is an integral part of the machine, this would need a phase converter. There is no problems using a converter with the magnetic chuck.

 

[Kyle Royer]

Dan, my old surface grinder has a belt drive, so I just put a single phase motor on it. Most have a motor that is an integral part of the machine, this would need a phase converter. There is no problems using a converter with the magnetic chuck.

That is what I have and it works great!

 

[kc custom]

I too have a 1964 model K O Lee, belt driven put on a 110 3450 motor and 0 problems.
Ken.

 

[Fellhoelter]

I used a VFD on mine.

The electromgenet has its own 110v supply on mine....

 

[Nathan the Machinist]

Dan, my old surface grinder has a belt drive, so I just put a single phase motor on it. Most have a motor that is an integral part of the machine, this would need a phase converter. There is no problems using a converter with the magnetic chuck.

Do you still have the original motor? They're specially balanced. I have a surface grinder that needs a new motor. Wanna sell it?

 

[DC KNIVES]

Your much better off getting a VFD instead of a phase convertor.They are horribly ineffiecent and with a rotary you have another motor to deal with hence more power draw, the static ones are all but useless.VFD's give you all you need plus motor protection and adjustability.Dave

http://dcknivesandleather.blademakers.com/

 

[blindhogg]

My three phase 220v surface grinder has a 110v electromagnetic chuck.
Chris

 

[Don Hanson III]

Do you still have the original motor? They're specially balanced. I have a surface grinder that needs a new motor. Wanna sell it?

Nathan, I believe it's a 3/4 HP and old as dirt, with a 5/8" shaft. I'll dig it out and will see if you can use it.

 

[Nathan the Machinist]

Nathan, I believe it's a 3/4 HP and old as dirt, with a 5/8" shaft. I'll dig it out and will see if you can use it.

:thumbup:

 

[Dan Seaver]

Thanks for the info guys, I'm gonna give him a call and try to lower his price.

-Dan

 

[messermacher]

More than likely, the chuck is single phase. All the ones I have used and owned have been.

 

[Dan Seaver]

I've decided to take the advice I've been given and go VFD. Its a bit more expensive but I want to be able to get the full 2 hp out of the motor.

It turns out it doesn't come with a chuck so I'm just buying a permanent magnetic chuck.

Now I just need to sell $500 worth of damascus within the month and she is all mine. I'm very excited.