Can't square 6" Jet jointer fence

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Forum topic by DygertDesigns27 posted 12-19-2016 08:07 PM 644 views 0 times favorited 4 replies Add to Favorites Watch
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1 post in 456 days

12-19-2016 08:07 PM

Topic tags/keywords: 6 jet jointer jet jointer jj-6os jj 6os square jointer square set up

I recently purchased a 6” Jet open stand jointer model JJ-6OS. I tested the squareness of the fence to the table and it’s slightly off. When I loosen the lock-down lever (?) I can manually square the fence but as soon as I retighten the lock-down lever that keeps the fence from moving, it pulls the fence back out of being square. I googled manuals for the jointer but the pictures and descriptions don’t match my jointer even though the model number on my jointer matches the manuals I find online. Does anyone know anything about an alternate manual for the JJ-6OS, or is anyone able to help direct me on maintaining squareness of the fence as I lock it into place? Thanks so much in advance!

4 replies so far

View splintergroup's profile


1925 posts in 1153 days

#1 posted 12-19-2016 08:26 PM

I have the cabinet version (6cx?).
I recall the fence tilt adjust stop being stubborn, there is enough slop in the jam-nut setup that you need to compensate in a trial and error approach.

Once the stop is set correctly, I hold the fence against the stop with the handle, then lock the tilt lever.

If you are not using the stop, cleaning the surfaces where the lock lever bites in will help (remove paint, burrs, etc.)

Also inspect the washer for flatness.

View knotscott's profile


7935 posts in 3306 days

#2 posted 12-19-2016 08:50 PM

As an alignment aid, these HF magnetic welder’s square are cheap and useful.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View syenefarmer's profile


485 posts in 3011 days

#3 posted 12-20-2016 12:02 AM

I use a Wixey Angle Finder to sneak up to 90° on my jointer, also a Jet.

View AshTheArtist's profile


28 posts in 467 days

#4 posted 12-20-2016 12:22 AM

I have jet 10BTOS so i feel your pain.. that what I do. If you have two 90 squares, you can clamp them at either side of fence after loosing the lever. To the fence and with the bed using 4 clamps. Then tighten the lever.

-- Ash @ touchwoodarts

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