Setting jointer knives

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Forum topic by phil619 posted 12-14-2008 01:12 AM 8154 views 3 times favorited 10 replies Add to Favorites Watch
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35 posts in 4527 days

12-14-2008 01:12 AM

Topic tags/keywords: question trick tip

Hello, I’m a long time reader first time poster. I have a Ridgid jointer and I’m having a tough time setting the knives. When I set the knife parallel to the outfeed table and then tighten the lock screws the knife wants to rise. Any suggestions?

-- Building fine furniture in my driveway.

10 replies so far

View tenontim's profile


2131 posts in 4820 days

#1 posted 12-14-2008 02:20 AM

Use a piece of wood to hold down the blade, and snug the bolts down a little at a time until they’re tight.

View DustDawg's profile


10 posts in 4689 days

#2 posted 12-19-2008 09:35 PM

I have an 8” Delta X DJ20 which required all of the blades to be changed after running a board through with a hidden nail. A fellow woodworker posted this method on Sawmill Creek and it works flawless for me:

“I took a piece of 1/4 plate glass 5 1/4” x 12”
and super glued 4 rare earth magnets to it.
2 to hold the glass to the out feed table 2 to snatch the knives”.

The magnets hold the knives to the glass which is on the same plane as the out feed table.

Purchased the knives from Global Tooling and also saved a good bit of money:

Simple and Cheap

Good Luck,

View ChesapeakeBob's profile


370 posts in 4559 days

#3 posted 12-19-2008 10:01 PM

OK… slightly diffrent topic, but related just the same: I have the DeWalt DW735 planer. I read somewhere about a guy who made a jig for sharpening his three planer knives. DeWalt claims they cannot be sharpened, only replaced, but this guy said, no, they are in fact sharpenable.

Does anyone have experience either with sharpening these knives of remember seeing information concerning the shaprening jig?


Chesapeake Bob, where is it chilly and damp here in MD.

-- Chesapeake Bob, Southern Maryland

View DrDirt's profile


4615 posts in 4818 days

#4 posted 12-19-2008 10:46 PM

The blades on the DW planer can be sharpened so long as they end up with the same dimension for all three.
Because of the way the blades are set with pins, you cannot adjust knives up and down, so like any blade you can sharpen it but just make sure all three match.
I buy blades at global tool and the cost (I know I am falling into that disposable society mold) but I cannot really bring myself to spend the little shop time I get messing around with jigging and grindinv vs. what I would could save by sharpening.

-- “The two most important days in your life are the day you are born and the day you find out why.” Mark Twain

View phil619's profile


35 posts in 4527 days

#5 posted 12-20-2008 09:19 PM

That is a awesome idea DustDog. I purchased the jointer pal which uses the same concept, but the knives would still rise a fraction above the outfeed table. I also used tenontim’s suggestion but with little luck. I finally set the knives a fration low so when I tighten the lock nuts they would rise parallel to the outfeed. Of course there was alot of trial an error. I will definitly try the plate glass method next time, which I hope will be for quite some time.

-- Building fine furniture in my driveway.

View Chris Cunanan's profile

Chris Cunanan

339 posts in 4556 days

#6 posted 12-20-2008 09:38 PM

Dave, which global tool is that? a lot of different ones come up, can you give me the link please? I have a 6” geetech (grizzly i believe) jointer and the dewalt 12 1/2” planer, i need 2nd sets on both baddly, to the point where I don’t even use the planer anymore, it’s quite sad =( lol

View DrDirt's profile


4615 posts in 4818 days

#7 posted 12-21-2008 04:16 AM

Chris -
This is where I got my Jointer knives from – I have the 6 inch Delta X5

I have the Dewalt 735 Planer and I got the knives from Infinity and have had better edge holding than factory OEM blades
they were 59 bucks :-0 for the three knives, versus 55 from Woodworkers Supply for stock parts. But the quality is better than stock ones

-- “The two most important days in your life are the day you are born and the day you find out why.” Mark Twain

View marcb's profile


768 posts in 4749 days

#8 posted 12-21-2008 09:39 PM

View 8iowa's profile


1591 posts in 4837 days

#9 posted 12-22-2008 04:59 AM

Due to the woods tendency to “springback” author Nick Engler recommends that the blades be set .001 to .003 inches above the table at their highest point of their arc. (ref: “Sanding and Planing” Rodale Press 1994)

In regards to the DeWalt planer blades. The hardness of the edge may be only a few thousands deep. Thus sharpening may not produce a keen and lasting edge.

-- "Heaven is North of the Bridge"

View DucKnuckles's profile


236 posts in 314 days

#10 posted 12-16-2020 11:27 AM

Wonder if I could glue two of these to a piece of polyethylene cutting board as a setting jig?

I honestly considered just using the magnets alone since they are 4 inches long. Thoughts?

-- “If I had 8 hours to chop down a tree, I’d spend 6 sharpening my ax.”

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