I actually tried this last year when I needed to make large box joints
on my crapsman ts and couldn't afford to buy a dado. I found a set of
7 identical B&D 7-1/2" steel blades and stacked them with washers and
poster board shims between them to get the right spacing.

I cut 240 3/8" box joints with it. When I first started, the notches
came out fairly nice requiring minimal clean up. After about 180 cuts,
I had to do moderate clean up of each notch bottom with a chisel.

After I finished I just threw away the blades since they only cost me
$4.99 for the set.

Would I do it again? ONLY if I HAD to cut dados and HAD no money. They
made such noise I was scared out of my gourd the entire time.

Tillman


"Greg Millen" wrote in message ws.com...
Tom,

assuming it wasn't a dado set he was using, it is likely the blades were
steel and not carbide tipped. Should you have a stack of carbide spinning at
3450rpm and one blade either slips or stops, the remaining blades will have
so many teeth missing it'll look like the nightshift at the WaffleHouse.

This assumes the freed teeth haven't turned you into a colander and you are
still physically capable of looking at the mess.

--
Greg


"Tom Lewis" wrote in message ...
Some 40 years ago when I was in high school the shop teacher would stack
regular saw blades together to make dado cuts. Why shouldn't that be
done?

Tom