A friend asked about changing jointer knives and since I needed to change mine I figure a how to would be nice, so here you go.
This first pic is of the items need. I have a honer there but that isn’t necessary for this. You will need new blades, a square, straight edge, pencil or fine tip sharpie, and I am using a jig, although a straight piece of wood works just as well. But I will get into that later.
First the highest point of the knife needs to be at the exact height of the out feed table. My old knives were so I marked them.
Here you can see I carried my mark up. Next remove the bolts from the first knife and remove the knife.
When you put everything back together don’t forget the blue loctite. These are not bolts that you want working their way out!!!!!!!!
Here you see me using the indexing screws that are in my jointer. Had I know these were here I would not have spent the $35 on the jig. We live and learn. I found the jig to be a bit of a pain. It is metal and I was concerned for my brand new blades. I found that a piece of wood with a straight edge worked better for me. I sat the wood in place raised the knife higher than the out feed table, and then slowly lowered it back into place. That’s the way it goes. The jig will look cool hanging on my wall I guess.
Once you have the knife exactly where you want it tight 2 bolts. I then removed the jig and used a piece of wood to make sure I had it where I wanted it. Then I put loctite on the other two bolts and tightened them in. I then removed the first two bolts, add loctite and then put them back and tighten.
Do the same on the rest of the knives. I only have 2 on this jointer so it went quickly. I think the entire blade change took about 30 minutes, even with stopping to take pics.
This is why I needed to change my knives. I have a box coming up that will be using this wonder full Walnut Burl and my old knives would have chewed it up.
Just a couple more points and I am done here. First before you start unplug your jointer!!!!
Second once you have everything back together, spin the jointer head to make sure it spins freely. Be careful not to cut yourself, those blades are sharp. Next I plug in my jointer then turn it on/off really quickly to make sure everything sounds good. After this run a board through and see what you get. If the knives are to low, the board will hit the out feed table. If they are to high you will get snipe on the end of the board.
I hope this helps someone out there. If there are any questions or suggestions, please leave them. We all have different ways to do things, and I love to learn new ways.
Thanks for giving it a read.
Until next time,
-- JoeyG ~~~ http://www.facebook.com/JHGWoodWorks