On 07/27/2012 03:43 PM, Doug White wrote:
Lionel Wagner wrote in :

On 07/06/2012 05:14 PM, Doug White wrote:
amdx wrote in
:

On 7/4/2012 11:25 PM, Jon wrote:
Please advise me.

What kind of oil should I use for a 1/3 hp electric motor?

The motor bearings have oil ports.

Can't I just use regular automotive motor oil? Would gear oil be
better?

It's the fan motor for my electric furnace (squirrel cage). The
original 1/3 hp motor blew up. The furnace guy insisted I put a 1/4
hp motor in, but the capacitor blew and the 1/4 hp motor blew up. I
had a surplus 1/3 hp motor I bought. It turned in the wrong
direction so I reversed the stator. It worked ok all last winter but
I want it lubed up for next winter. The biggest problem is keeping
the wires away from the fan blades because the stator is reversed,
but I've got them tied back pretty good. Jon

Sewing machine oil.

Typically too thin. How about electric motor oil?:

http://www.amazon.com/3-IN-ONE-10045.../dp/B00065VGUC

Doug White

I prefer Mobil One 0W30. It is thin, to work itself
in tight bearings. Has detergent additives to dissolve
any old oil left in the bearings. And has a tough
synthetic base.

Detergent oil is NOT recommended for applications where you don't have
forced circulation & a filter. The detergent keeps particles in
suspension so a car filter can remove them. In other devices, it just
keeps any garbage floating around, adding wear.

Doug White

True, the impurities that are mostly old congealed oil,
that is not necessarily abrasive, will be dissolved.
Repeated oilings will eventually flush it out.