Theo Bekkers wrote in message
...
"Deep Freud Moors" wrote

Yes true. Grease is grease, and not designed as a lubricant. Oil is
designed
as a lubricant, grease is not. It does treat the metal surfaces to a
degree,
but any lubricating effect disappears quickly.

When you pack your bearings with grease, it gets pushed out of the way
of
the bearings after a couple of turns, and does not return due to its
viscosity. The driest part of the bearing assembly is usually the
surface
where the bearings run. Whilst that surface is clean, there are no
probs.
Basic wheels nowadays are not sealed either, but have donut-shaped
little
caps, which are designed to work in conjunction with the grease to keep
dirt
and water out.

What the? Why the hell do they grease wheel bearings in cars then?


Exactly the same reason of course.
---
DFM