On Wednesday, January 28, 2015 at 7:16:37 AM UTC-8, dadiOH wrote:
"DerbyDad03" wrote in message



I took the shot from
above to show the shoulders left by the wobble dado.

In another reply, you said you were going to reduce the width of the dado.
Good idea. If you had it set to way beyond the 1/4" you need, reducing it
to a hair over 1/4" will markedly reduce the curve.

This may be misguided; wobble-dado blades are sharpened at the factory in
a manner that will be a bad match for either extreme (wide or narrow)
of the width setting. There IS likely a setting at which the wobble-blade cuts
a flat bottom.

For my (Sears Craftsman 720.3261) blade, the instruction sheet indicates
that width is 3/4" (0.750 inches).