"robo hippy" wrote in message
...
George,
I will disagree on heat factors. Heat is caused by both pressure and
speed. The same amount of pressure at two different speeds will
generate different heat factors. Identical pressures at slow and high
speeds will also yield different heat factors. At very low speeds, it
is almost impossible to generate heat except under very high pressure.
Both speed and pressure factor into how much heat is generated.
robo hippy


You disagree with the physicists. To the extent that the coefficient of
friction may change by retaining dust under the pad, there may be slight
differences, though the greater radial velocity will have a net clearing
effect over the slower.
http://www.school-for-champions.com/...n_equation.htm

Consider the folks who use pneumatic tools operating at 15K and higher, or
the standard orbital sander which operates in the 10-15Kopm range. They
only get in trouble when they press, which increases the friction in the
standard equation as well as developing additional friction due to
deformation of the material and its holder. That's why they tell you to use
only the weight of the sander to hold it to the work.