Jointer knife sizes

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Forum topic by MontyJ posted 158 days ago 369 views 0 times favorited 3 replies Add to Favorites Watch
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36 posts in 201 days

158 days ago

I recently bought a used Jet J-6csx jointer. It looks like the previous owner probably hit a nail because there is a nick in all three blades approx 3/32 wide by something just over 1/64 deep. It’s more than I can take out by hand so I am having them sharpened professionally. In the meantime, I want to purchase a spare set of knives to have on hand.
However, when I measured the knives I got 6-1/16” x 11/16” x 1/8”. I checked on Holbren but they don’t seem to offer this size. The closest they have are either 5/8” of 13/16”.
So, how critical is the width? I’m thinking I can just use the 5/8” knives, but wanted to be sure. After all, I have never owned a jointer before.
Does anyone who owns this same jointer have a recommendation?


-- Pro Libertate!

3 replies so far

View firefighterontheside's profile


3762 posts in 482 days

#1 posted 158 days ago

The originals can only have gotten smaller with sharpening. Was there a 3/4 option? I’ve never ordered them either. Mine came with two sets and I’ve never measured them.

-- Bill M. I love my job as a firefighter, but nothing gives me the satisfaction of running my hand over a project that I have built and just finished sanding.

View Nicky's profile


636 posts in 2718 days

#2 posted 158 days ago

6-1/16” -long by 5/8” -tall and 1/8” -thick knives

Review from

-- Nicky

View MontyJ's profile


36 posts in 201 days

#3 posted 158 days ago

Thanks. I just found it in the manual too. Don’t know how I missed it before. I wonder why mine are a heavy 11/16”. I’m ordering 2 of the 5/8” sets from Holbren.

-- Pro Libertate!

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