On Sun, 16 May 2010 14:48:43 +0100, stuart noble
wrote:


Don't use many angle grinders do you? Regardless of the 10,000 RPM, it
still does not approach the speed of a simple circular saw or a sawzall.


My simple circular saw RPM is less than half that. Peripheral speed
unknown though
Just checked a couple saws. One, a 6.5" runs 3700RPM for a cutting
speed of 6269sfpm.
Another, 7.25" @ 5000 rpm for 9490sfpm.
a 5" grinder @10,000 rpm is 13090 sfpm -