On Sunday, October 4, 2015 at 5:07:21 PM UTC-5, trader_4 wrote:
On Sunday, October 4, 2015 at 5:25:22 PM UTC-4, Uncle Monster wrote:
On Sunday, October 4, 2015 at 3:03:51 PM UTC-5, Bob wrote:
Hello,

Trying to get the gunk and dried up grease out of motor bearings.
Unit is eons old, and armature won't turn easily anymore.

Tried Liquid Wrench, and also soaking in gasoline.

Neither seems to dissolve the stuff.

Anything better ?

Thanks,
Bob

If they're open bearings try brake cleaner and or kerosene. Use a parts cleaning brush with long enough bristles to get down into the bearing and if the bearings are small, an old toothbrush will work. ^_^

[8~{} Uncle Greasy Monster

+1 on the brake cleaner or even some gasoline. That is assuming the
bearing is separate from the motor and no issue of getting stuff in
the windings, etc.

In the past, I've used Electro-Wash from Chemtronics. It's been reformulated to protect the cute little ozones but it won't damage the insulation of the windings in an armature. It's available from electrical, electronic supply houses and industrial supply houses. ^_^

https://www.chemtronics.com/d-30-electro-wash.aspx

[8~{} Uncle Dirty Monster