GI - not really TEFC - Help with info

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Forum topic by ken_c posted 08-22-2010 03:02 PM 1233 views 0 times favorited 6 replies Add to Favorites Watch
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314 posts in 2582 days

08-22-2010 03:02 PM

For all that have cabinet saws with TEFC motors, do you need to perform maintenance on those motors? Do they get packed with dust even though they are supposed to be totally enclosed – The TE part of TEFC. I ask because in my one man shop I have a General International 50-260. It is sold with a TEFC motor however the motor case is getting packed with dust, even though it is run all the time with two dust port connections running, a five inch port and a 4 inch port from a 3hp cyclone. I understand why it is happing – because in is not really TE – I can blow it out and getting running again but I think that shouldn’t be necessary – does this happen with a Marathon, Baldor or Leeson motor?

6 replies so far

View Ger21's profile


1047 posts in 2551 days

#1 posted 08-22-2010 05:52 PM

A TEFC motor is totally enclosed – except for the fan. Is it just the fan getting clogged up? Or maybe you don’t really have a TEFC motor??

-- Gerry,

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314 posts in 2582 days

#2 posted 08-22-2010 08:54 PM

that is what I am saying – GI table saw motors are sold as TEFC but they are not!!!

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314 posts in 2582 days

#3 posted 08-24-2010 02:14 PM

still looking for info – do others with cabinet saws that have marathon, baldor or leeson motors have to blow dust out of their motors?

View helluvawreck's profile


22669 posts in 2286 days

#4 posted 08-24-2010 02:28 PM

We have a lot of tefc motors around the plant but usually don’t have to baby them. To me, when one considers how long an electric motor lasts and how much work they do they are really amazing.

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View MedicKen's profile


1610 posts in 2882 days

#5 posted 08-24-2010 02:55 PM

I have had many a TEFC motor apart and they ALL have been packed with sawdust, Baldor, Leeson, etc. The motors that are listed as TEFC are, in fact, TEFC. The motors will only need maintenance in very extreme situations or after years of service. Most of the dust makes it way in through the peckerhead, the wiring junction box. A TEFC motor is not 100% sealed so that dust cannot enter. If you look at the construction you will notice that there are not any seals in the end bells where the shaft(s) protrude, it is a metal shaft exiting through a metal housing.

-- My job is to give my kids things to discuss with their

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314 posts in 2582 days

#6 posted 08-24-2010 03:22 PM

Medicken – Thank you for your meaningful reply – finally someone read my question.

Peckerhead? Are you ex Navy too…

It only took 6 years for the motor in my GI to get so packed that I had to blow it out – I consider that to soon – the motor would not spool up – Thoughts?

BTW – I always run the saw with a 3hp cyclone connected to it. I also made foam seals for the cap covers. I made one for the peckerhead and the brake cover but then realized that yes the arbor exits the end bell and there was no way to seal that so gave up on that plan.

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