On Thu, 29 Sep 2011 22:33:35 -0700, Winston
wrote:

Larry Jaques wrote:
On Thu, 29 Sep 2011 21:18:13 -0700,
wrote:

(...)

Nup. These were top-o-the-line Bosch blades in a
nice Bosch saber saw.

That surprises the heck out of me.

Me too, since the same blade cuts through steel
really nicely when the workpiece is clamped in
a bench vise and the saw is guided by hand.

Are you absolutely sure it's not caused by vibration of the workpiece?
If the piece is hopping, it could -induce- a waggle, oui?

--
In the depth of winter, I finally learned
that within me there lay an invincible summer.
-- Albert Camus