"Henry E Schaffer" wrote in message
...
In article ,
Ernie Jurick wrote:
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Yeah, if the blade is moving at 4000rpm and the reaction time is 5
milliseconds, all those sharp little teeth make a full revolution+.

4000rpm = 66.7 revolutions/second.
5ms = .005 second

66.7 x .005 = .3 revolutions.

Still very unpleasant - but not a full revolution.

It's a lot easier, cheaper and less painful to be careful. :-)

Of course - but even careful folks can have accidents.

Thanks, Henry. Math is not my strong point.
-- Ernie