How Often to Repack Trailer Wheel Bearings?

Dave H M wrote:
Now I will never use the cheap bearings and replace them with Timken.


Uhhhhh, a while back I bought one of those good Timkins.

Sure enough the box was made in the USA, but the bearing had made in china stamped on it.

Timken has plants in many countries and I wouldn't be afraid to use their brand if it was imported and a not a cheap knockoff. The Timken trailer bearings that I have purchased all were in USA boxes with USA etched on the bearings.

The failures that I have had were Chinese bearings from eTrailer that were of the same brand that come as original equipment on many axles. When I inspected and closely measured the failed parts, I found poor quality steel, angles out of tolerance, poor finishes and incomplete grinding of the load surfaces. Yes, I obtained the bearing blueprints and have the equipment to inspect them.