Jointer knives.

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Forum topic by Iggles88 posted 04-21-2012 12:51 AM 1330 views 0 times favorited 4 replies Add to Favorites Watch
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247 posts in 2327 days

04-21-2012 12:51 AM

Hey guys, I’m in the process of tuning up my jointer. I was getting less then pleasing results with it lately and knew I needed to check some things. First of all the jointer I have is the jet jj6csx. My infeed table is sagging by .010 away from the cutter head. I’m not exactly sure how to fix that but that’s another post. I also noticed that my knives need to be sharpened but I think I’m just going to buy a new set. Does anyone have any experience using the Freud knives? I need to get knives that aren’t going to kill me on price because I’m going to need to buy a knife setting jig (or build one.) I’d build a jig just haven’t found any good ones. I’ve also never changed the knives on my jointer so this will be new to me. Any advice would be great.

4 replies so far

View Grandpa's profile


3259 posts in 2642 days

#1 posted 04-21-2012 01:12 AM

You need to set the top edge of the knives to the exact top of the outfeed table or maybe .001-.002 above the top of the table. I think I would remove the old knives and get that infeed table set first then put int he new knives. You can use a jig to install them. Make sure you get both ends set and level with the table. I have read and used a method that calls for wrapping a stone in a sheet of paper (one thickness) and sliding the paper on the outfeed table. This puts a compound edge on the knife. I have used this and it works better than it sounds. I think GARAGEWORKS has a video on installing new knives. Sorry I have not used Freud knives. Good luck.

View 8iowa's profile


1580 posts in 3728 days

#2 posted 04-21-2012 01:15 AM

Perhaps you might glean some useful information from Nick Engler’s video clip on setting jointer knives;

-- "Heaven is North of the Bridge"

View Birks's profile


109 posts in 2195 days

#3 posted 04-21-2012 01:37 AM

8iowa, I haven’t seen that video and was looking forward to watching it, however it told me it was unavailbable when I went to the site…?
When I setup my old used jointer that needed lots of tlc I used this video from Bob Vaughan. No jig needed. Just buy a $35 dial indicator with a magnetic base, some sort of lever, a block of wood and a hammer (lol) and give yourself an hour or two and you’ll have the knives right where they should be.

I should mention that your machine may be new enough that you have set screws to adjust the height of the blades. Look for them and if you find them you’ll have saved yourself a couple of hours lol.

I installed the Freud blades from WW supply (around $30 IIRC) on my jointer, but I haven’t used them on a bunch of different wood yet. Red oak, pine, poplar, indian laurel, cherry- all came out super clean though, so good enough for my shop.

In terms of getting the tables coplaner without a parrallelogram style jointer, it is my understanding that you have to shim the tables using whatever works (feeler gauges, pop cans, etc). See this page for a description of shimming the dovetail ways and tightening up gib screws

I am by no means an expert here, but I went through a lot of this to get my $100 jointer up and running.

View Iggles88's profile


247 posts in 2327 days

#4 posted 04-21-2012 01:44 AM

My jointer is only 4-5 months old. Very frustrating that my table is sagging because I know it’s going to be a pain trying to figure it out.

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