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Dan Coby

On 10/12/2010 5:46 PM, wrote:
On Tue, 12 Oct 2010 11:28:12 -0400,
wrote:

17 teeth?

How fast can you push your finger?

wrote in message
...
That may be true, but they still don't do any harm.

Sawstop stops the blade in 1/200 of a second, according to their Web
site. At 3450 RPM that means the blade stops in .29 revolution, which
with a 60 tooth blade means that 17 teeth have had a shot at your
finger.

Actually significantly LESS than 17 teeth, because the blade is very
quickly slowing down throughout that 1/200 of a second. I believe the
number is something like SEVEN teeth pass the gullet from the time of
contact to full stop, and the last 3 or 4 are pretty well stopped as
they go by.
A demonstation showed a damp peice of cardboard stop the saw with
barely a nick in it.

Another important part of the SawStop design is that the blade is dropped
below the table's surface as the blade is being stopped.