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05-11-2012, 01:51 PM
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#1
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Should be working
Join Date: Apr 2011
Location: California
Posts: 3,791
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Single Phase Motor replacement
1/85th of a horsepower !!
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05-11-2012, 10:15 PM
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#2
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Senior Member
Join Date: May 2009
Location: Depoe Bay, Oregon
Posts: 9,902
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That's cute.
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05-12-2012, 01:35 AM
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#3
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Bilge Rat
Join Date: Aug 2007
Location: Fernley, Nevada (near Reno)
Posts: 2,369
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Yep, cute little motor!
Those are almost always shaded-pole type. Very low starting torque, and about 20% efficient. But very inexpensive to manufacture.
Most of the failures I've seen are because the sleeve bearings went dry.
Some of these motors are impedance protected. They can be powered continuously with the rotor locked and not burn up.
In this case, the efficiency is reduced to 0%........
Lol.
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05-12-2012, 03:08 AM
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#4
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Wire Ninja
Join Date: Jan 2007
Location: Beautiful Cumberland Valley, in PA
Posts: 16,794
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I call those "skeleton motors". I think it's either United Refrigeration or Johnstone supply that sells those bearing end pieces as replacement parts. They're hard to find, otherwise.
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Teach a man to fish and you’ve ruined a good business opportunity.
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05-12-2012, 09:47 AM
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#5
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Senior Member
Join Date: Mar 2009
Location: SF Bay Area, California
Posts: 1,530
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Quote:
Originally Posted by MDShunk
I call those "skeleton motors". I think it's either United Refrigeration or Johnstone supply that sells those bearing end pieces as replacement parts. They're hard to find, otherwise.
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Yep. RSD (Refrigeration Supplies Distributor) is another source if you have one around you, likely on the shelf.
__________________
"If you don't know where you're going, then any direction will do." -- Lewis Carroll
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05-12-2012, 09:26 PM
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#6
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Should be working
Join Date: Apr 2011
Location: California
Posts: 3,791
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Quote:
Originally Posted by micromind
Yep, cute little motor!
Those are almost always shaded-pole type. Very low starting torque, and about 20% efficient. But very inexpensive to manufacture.
Most of the failures I've seen are because the sleeve bearings went dry.
Some of these motors are impedance protected. They can be powered continuously with the rotor locked and not burn up.
In this case, the efficiency is reduced to 0%........
Lol.
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Yep, that's my old bath fan motor. The bearings were stiff. It would get locked rotor and just buzz.
I was lucky a local suppllier that has everything stocked the replacement motor. $21.00
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05-12-2012, 09:37 PM
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#7
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1,000,000th Poster
Join Date: May 2010
Location: Portland
Posts: 9,408
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Quote:
Originally Posted by micromind
...Some of these motors are impedance protected. They can be powered continuously with the rotor locked and not burn up....
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I was under the impression that was actually a function of all shaded pole motors. Are they actually adding a separate winding to the impedance protected ones?
-John
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05-12-2012, 10:26 PM
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#8
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Bilge Rat
Join Date: Aug 2007
Location: Fernley, Nevada (near Reno)
Posts: 2,369
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Quote:
Originally Posted by Big John
I was under the impression that was actually a function of all shaded pole motors. Are they actually adding a separate winding to the impedance protected ones?
-John
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It's the way most smaller ones are built. The larger ones (usually found on older furnace blowers) are not impedance protected.
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05-12-2012, 11:01 PM
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#9
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I void warranties
Join Date: Jun 2009
Location: AZ
Posts: 10,842
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Quote:
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Originally Posted by dronai
Yep, that's my old bath fan motor.
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The paint and texture on the bearing is a dead give away it was a fart fan motor 
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The best never stop learning.
Last edited by Jlarson; 05-13-2012 at 01:54 AM.
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05-12-2012, 11:14 PM
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#10
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1,000,000th Poster
Join Date: May 2010
Location: Portland
Posts: 9,408
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So now you're gonna scrap the / and install one that's plain ol' 185HP? 
-John
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05-13-2012, 01:35 AM
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#11
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Should be working
Join Date: Apr 2011
Location: California
Posts: 3,791
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I tried to megger it, but no reading with the Supro ?
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05-13-2012, 01:37 AM
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#12
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Wire Ninja
Join Date: Jan 2007
Location: Beautiful Cumberland Valley, in PA
Posts: 16,794
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Quote:
Originally Posted by dronai
I tried to megger it, but no reading with the Supro ?
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Then it probably doesn't have a winding shorted to the laminations. There's many ways for a motor to fail. I thought you said yours just had locked bearings?
__________________
One reason not to give DIY advice:
Catch a man a fish and you can sell it to him.
Teach a man to fish and you’ve ruined a good business opportunity.
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05-13-2012, 02:05 AM
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#13
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Should be working
Join Date: Apr 2011
Location: California
Posts: 3,791
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Quote:
Originally Posted by MDShunk
Then it probably doesn't have a winding shorted to the laminations. There's many ways for a motor to fail. I thought you said yours just had locked bearings?
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I heard the noise of locked rotor sound ! So I thought it was shorted. So I meggered it. But later after I took it apart, I noticed how stiff the bearings where compared to the new one. After I read the comments here, It was just the bearings.
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05-13-2012, 07:08 AM
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#14
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Pure Evil
Join Date: Nov 2008
Location: Presque Isle, Maine
Posts: 5,214
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Quote:
Originally Posted by Big John
So now you're gonna scrap the / and install one that's plain ol' 185HP?
-John |
Not big enough to power the fart fan after I eat pickled eggs, this GE 100,000 hp unit should do the trick.
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