On Sun, 28 Oct 2007 21:25:23 +0900, Stealth Pilot
wrote:

On Sat, 27 Oct 2007 12:54:12 -0700, Diamond Dave
wrote:

On Sat, 27 Oct 2007 14:40:54 -0500, Ignoramus2057
wrote:

snip
ceramic bearings are used in a locally made, internationally marketed,
model jet turbine.
I asked the guy how much shock load a ceramic bearing could take.
"Hmmm let me show you"
He had a beairng that they had cut apart using a dremel cutoff blade
and took a ball out of the bearing.
on the back peening pad on his 6" bench vise he placed the ball.
then he gave it one almighty whack with the largest size ball pein
engineers hammer. I mean he really laid into it!
on the bench vise could be seen a hemispherical dimple that looked to
be half the size of the ball. in the face of the hammer was a smaller
hemispherical divot.
the ball itself was lost down the back of the workshop because we
heard it smack the rear door.

some of those little balls can be damn near indestructable.

Stealth Pilot

Ouch! Why would he do that to his vise or hammer? Or potentially
either of you? That certainly demonstrated his point, but you have to
wonder about his thought processes. I bet he's done the same trick
before.

Pete Keillor