Quote Originally Posted by hemmjo View Post
Cutting sheet goods with a circular saw requires negative rake on the tooth. You can buy specific blades designed for steel. Putting a regular blade on backward gives you that negative rake. A regular blade on backward works almost as good as the special metal cutting carbide blade for 1/4 to 1/3 the cost.

I save my dull/damaged carbide blades for things like this.
I figured for sure if you ran a carbide tipped blade backwards it would just shatter the carbides or rip them off of the brazing. With most carbide cutters if you keep them in compression they'll last ages, but the second they go into tension they just bust to pieces. Well that's just super interesting. I may try that some day. Thank you.