Trouble with a Jet JJP-8BT Jointer/Planer

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Forum topic by Jeison posted 09-18-2010 11:08 PM 3926 views 1 time favorited 9 replies Add to Favorites Watch
View Jeison's profile


968 posts in 3436 days

09-18-2010 11:08 PM

Topic tags/keywords: tip question trick jointer jet jjp-8bt

So life has eased up on me enough to let me get back to makin’ sawdust, and I’m trying to get everything tuned up and ready to go. Long story short, high priority is to get my jointer set up, but no amount of fiddling and woodrage seems to let me get the infeed and outfeed tables coplanar. I’ve searched around and found that other people have had the same problem, but no one seems to have posted solutions (other than “yay its fixed now and works awesome!” which is remarkably annying lol)

Soooo if anyone knows any tricks for this thing that they’d like to share, be much appreciated. Was going to call Jet direct but it being the weekend and all I haven’t had any success on that front.

-- - Jei, Rockford IL - When in doubt, spray it with WD-40 and wrap it with duct tape. The details will attend to themselves.

9 replies so far

View Colin 's profile


93 posts in 3139 days

#1 posted 09-19-2010 12:20 AM

There is enough play in the dovetail ways to allow some shimming. Use v 32 laminate scraps or plastic playing cards.


View Colin 's profile


93 posts in 3139 days

#2 posted 09-19-2010 12:21 AM

By the way, I would try to shim the outfeed to the infeed since your outfeed will seldomly be moved.


View CyBorge's profile


79 posts in 3503 days

#3 posted 09-19-2010 02:40 AM

I have heard Jet has a separate instruction sheet that shows an unintuitive way of adjusting the tables. Apparently their support people are familiar with the problem and will e-mail you the instructions right away. Give them a call and see. Hopefully it’s the right type of adjustment for your situation.

-- "How can I be lost if I've got nowhere to go?"

View j_olsen's profile


155 posts in 3500 days

#4 posted 09-19-2010 03:02 AM

Jei if you’ll send me your email address i will email you the instruction sheet that CyBorge mentioned—I have the 10” model and called Jet for the instructions

-- Jeff - Bell Buckle, TN

View rbterhune's profile


176 posts in 3550 days

#5 posted 09-19-2010 03:24 AM

I went through 3…yes 3…of the 10” version. Not a one had coplanar tables and fences that were not warped. In the end, I sent them back and moved on to other options because there is very limited adjustment in those machines. The only adjustment is the play you have in a screw hole on the outfeed. (By the way, this is what they send you in that email the guy referred to.)

It’s a shame, I loved the concept for my little shop. I love my Jet saw though.

View Jeison's profile


968 posts in 3436 days

#6 posted 09-21-2010 12:51 AM

Huzzah! thanks guys (specially Jeff for the pictures showing exactly what to adjust), I had been playing with the infeed side, once I knew what I was doin, took all of two minutes to adjust it and now the tables are dead-on. Really wasn’t much play to adjust it, but luckily was enough for me. Now if you’ll excuse me, I have some piles of wood that demands some attention :D

-- - Jei, Rockford IL - When in doubt, spray it with WD-40 and wrap it with duct tape. The details will attend to themselves.

View jerseymike's profile


4 posts in 3148 days

#7 posted 04-14-2011 02:24 AM

I just bought one of these used. Would it be possible to get a copy of the instructions for setting tables coplanar? Thank you so much.

View Britztopher's profile


26 posts in 1631 days

#8 posted 11-01-2014 07:58 PM

I know this post is old, but can someone email me these secret instructions? I cant seem to get my infeed and outfeed coplaner. It appears to be off by like 1/16th of an inch

View daddydave's profile


12 posts in 872 days

#9 posted 06-01-2017 05:30 PM

Have strong space constraints and the Jet JJP-8BT would be perfect. Gun shy with the complaints about the co-planer problem, but have background as a machinist and willing to spend attention to the problem IF this machine will then be reliable for normal hobby type duty?

Is anyone out there that has set up this unit and been using it for an extended time with satisfaction? Going to bite the bullet in about a week if there is some positive feedback

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