The solid carbide square inserts—with four sharp edges on each—in this jointer's spiral cutterhead will go well more than four times as long as high-speed-steel straight knives before needing rep…
lacement. And you can rotate or replace individual inserts as they dull or become nicked. The square inserts left small ridges (similar to those caused by a nicked straight knife) on the surface. Also, the square inserts cut slower and required more feed pressure than any other style of cutterhead we tested because they don't clear wood chips as well. We like the G0593's rack-and-pinion system for moving the heavy fence across the table. However, we wish this jointer had a depth-of-cut limiter. If you don't work much with figured woods, consider buying Grizzly's G0586, a straight-knife version of this machine, for about $300 less.
Ease of Use
out of 5