[jdowney]

This planer uses the square blades that are mounted to a helical drum. So dull blades can be rotated 90 degrees to give the cutter new blades to cut with. I also purchased some spare blades in case I hit a nail or something.

20" Helical Cutterhead for Planers at Grizzly.com

<h1>Grizzly T27694 20" Helical Cutterhead</h1> <h2>Upgrade your cutterhead to improve your finish. </h2> <p>The T27694 20" Helical Cutterhead provides quiet operation, better dust collection and dramatic improvement in finish over straight-knife cutterheads. </p> <p>Each indexable carbide insert...

www.grizzly.com

I put an insert cutter head in my old P100 planer, that carbide lasts soooooo much longer than steel! My excuse was that my wife wanted to re-plane a bunch of ipe decking, and I didn't want to change the HSS blades for her every fifth board (or however many, I bet they would dull fast though). I've had that cutter head since 2015 and only just recently rotated the carbide inserts the first time. Love that setup!