"George" wrote in message
et...

"Gerald Ross" wrote in message
...
George wrote:
"Gerald Ross" wrote in message
...

The faster the speed, the faster the cut, and more heat generated.


No. Heat doesn't come from removing material, it comes from rubbing
against what's there.

This bit of misinformation keeps getting repeated all the time, but if
you reduce the pressure of one item against another while grinding,
sanding or buffing, you will reduce the amount of heat.

That's why your 15,000 rpm orbital sander says not to press or you'll
melt the velcro.
I didn't say removing the material generated the heat. Just that a faster
wheel generates more heat, all else being equal.

Might want to tell the Physics types about your discovery.
http://en.wikipedia.org/wiki/Friction
Isn't there two things happening when you sand?. Friction and material
removal both of which generate heat.

BillR