Review on Freud 6-inch x 5/8-inch x 1/8-inch HSS Industrial Planer and Jointer Knives (C350) with Enhanced SEO by Justin Garrett

I bought these to replace knives on my 4 inch Rockwell joint. My model is from the early 70's with a heavy gray powder coated steel case. They are a bit thicker than the original knives so I had to buy a 7mm wrench and sharpen it thin enough to reach the draw bolts. The 5/16" size would probably give a tighter bite but I couldn't find it. The 7mm worked well. It's very important that you have a wrench thin enough to reach the screws without catching on the cutter head. You should be able to tighten it about 1/8 turn past resistance to ensure it is properly seated. A faulty bolt can cause the knife to fly around during use, which is a recipe for injury or worse. As long as you tighten them properly these knives work great.Note that these knives will overshoot slightly and you will likely need to adjust the weight to get them straight.Also be sure to clean the slots when you take the old knives out.The knife should fit the slot snugly to reduce friction and ensure straightness.