On Thu, 11 Sep 2014 07:25:36 -0700, "William Sommerwerck"
wrote:

"Cydrome Leader" wrote in message ...

I did once basically explode a squirrel cage blower with the
pressure side of a vacuum cleaner. It ran so fast that the fins
expanded and touched the housing and became a bent-up
mess before flying out of the housing across the room.
I was not expecting that.

"NO ONE expects a squirrel-cage blower explosion..."

Years ago I was cleaning some bearings and was blowing the solvent out
with compressed air. I knew this was bad news but it was interesting
to really spin up up bearings. Anyway, I put this bearing on my index
finger and spun it up real good. The pitch of the whine from the
bearing rose higher and higher as the speed increased. Just when the
pitch got so high I couldn't hear it the outer race of the bearing
exploded and the balls went flying. I thought my finger was broken
but it just hurt like hell. Needless to say I bought new bearings.
Eric