Motor question: TE vs. TEFC

silver_pilate

silver_pilate

Joined
Oct 30, 2002
Messages
3,974
Have a potential little problem. Well, maybe more on an unexpected extra purchase. I ordered a 3/4 hp 3 phase motor from Grizzly's sale page with the understanding it was a TEFC (seeing how it said "TEFC" on the specs).

The motor I received is a TE motor with the following specs:

FR: FM56
Type: P
PH: 3
HP: 3/4
RPM: 1725
Volts: 230/460
Amps: 2.2/1.1
HZ: 60
SF: 1.15
Time Rating: Cont
Ins. Cl.: F
Ins. Type: F+
AMB C: 40
Code: K / TE
NEMA: 82.5

Here's a pic:

IMG_0710.jpg


Another issue is that it has now way of face mounting, and I was hoping to use this vertically with a modified motor mount from Beaumont as a disc grinder. On the other hand, the back of the motor is nice and flat, and I can probably rig a vertical mount for it using the mounting plate.

Any problem with me using this motor vertically as a disc grinder? Heck, I'll probably end up using this horizontally and get another 1 hp motor with a C-56 face to use with the Beaumont plate!

Thanks!

--nathan
 
Last edited:
TEFC stands for totally enclosed, fan-cooled. I am not 100% sure but I think your motor has a cooling fan in it since without one it would not be sufficient for industrial purposes.
As for mounting, you pretty much have to deal with it on a case-by-case basis, fabrication is sometimes necessary.
 
My KMG is a TEFC. Unfortunately, there's no fan I can find on this motor unless it's internal and at the front of the motor. I took the back off the case and can see the windings, but not the fan. This case is a totally enclosed case, and it's rated for continuous duty, but I'm worried about the fan issue.

Anyone have any other thoughts?

--nathan
 
Nathan,
I'm not sure but I think phase 3 is for an industrial heavy duty set up and is not usually found in a residential home. I could be wrong, but I think phase 1 is the common configuration for home use.

Larry
 
Larry, it is a 3 phase AC motor that needs a VFD to run for variable speed. I'm actually going to wire up a switching system and let it share the VFD that is currently running my 2hp 3 phase motor on my KMG. The VFD takes single phase input and convert it to 3 phase for the motor. It's the cat's meow, don't you know :).

--nathan
 
I don't think the TE vs TEFC will be a problem. However, running a motor that is designed to be horizontal in a vertical position may shorten its life. The motors made for vertical use have different bearing arrangements. The load on the shaft of most motors is designed to be perpendicular to the shaft , a good part of the load of a vertical grinder is parallel to the shaft. I don't know how much of an issue this is for an infrequently run tool, like a vertical disc grinder, but it is worth consideration, especially if using a heavy cast iron disc.

Stacy
 
Stacy, this motor will probably be run horizontally, as I've decided to go ahead and get a C-face motor to use with the Beaumont vertical mount plate I already have. I have a beveled disc and a flat disc, and I'll probably switch them out between motors. The discs are also Beaumonts, so they're milled aluminum and not extremely heavy. Also, with the infrequent use they'll probably see, I'm not too worried about it. I was just a little miffed at getting something other than advertised and wanted to make sure that there wasn't going to be a problem with the TE case.

Thanks for the advice, everyone!

--nathan
 
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