"Deep Freud Moors" wrote
Theo Bekkers wrote
"Deep Freud Moors" wrote

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.

Are you saying that if we had a way of sealing dirt out, we could run
bearings without grease?

From my dictionary
grease n.
1. animal fat in a soft or melted condition.
2. any thick fatty oil, esp. one used as a lubricant for machinery,
etc.

Theo