All Replies on Jet JJP-12 jointer table question

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Jet JJP-12 jointer table question

by Cajunmarine
posted 08-05-2016 01:00 AM

8 replies so far

View RobS888's profile


2635 posts in 2455 days

#1 posted 08-05-2016 02:28 AM

I have one, but other than the fence it didn’t need much adjusting.

-- I always knew gun nuts where afraid of something, just never thought popcorn was on the list.

View Cajunmarine's profile


20 posts in 1385 days

#2 posted 08-05-2016 04:19 AM

I have had mine around a year and last week I was planing a board and it somehow got jammed up and knocked one of the gears loose. I was able to put the gear back on and I thought everything was fine. Well, after I started using the planer I noticed the hight adjustment lock knob seemed to be really tight and after a little feeling around I found that the planer table height couldn’t be locked causing the bed to slowly drift down about 1/32 an inch on each pass. Well that fix was easy enough, just had to dive down to the bottom of the motor and tighten the two bolts that hold it in place. Woo hoo, I can finally finish my project. I planed a couple more boards then switched over to jointer mode. I need to face joint a 2 by 10 piece of pine. But now comes the disaster. I put my workpiece on the infeed table and hit the power button and here comes an ear piercing noise. The kind you never want to hear. 3 knives being gouged by hitting the castiron table. Sitting there I have no idea how the blades could possibly hit the table when I have the infeed table set to remove 1/32 of an inch. After crying over my blades for a while I started checking all,the settings then took out my straight edge to ensure the tables were coplainer. They were, also checked my blade height to ensure that too was set up properly.

Knowing Both tables are coplainer and the knives are set at the correct height , measured from the out feed table Common sense would say there’s no way for this to happen unless there is something else going on. Here is what I tried and what I think. With the machine off I slowly turn the cutter head until I feel the blade catching then I started lowering the infeed table about 1/64 a turn until the blade can spin freely. So here is the big issue. If I have the infeed table set just low enough to clear the blades then it’s impossible to get the out feed table back to coplainer and to the correct hight based off of the height of the knives. Then I spent many hours trying to make some very bold adjustments but once I get the tables coplainer I can lower my blades to the most deep setting and they still hit the table. I have tried doing this for 30 hours setting the tables up at different heights and the only position I have found that I can make the tables coplainer and have the knives set to the correct height won’t snag up is if I loosen the gib set screw as far as it will go. The issue with that is there is a fairly large gap between the hindge and the plate of the machine where it’s bolted any ideas on what could cause this. My only logical thought would be that somehow the cutter head shifted and that’s why I cant set the knives to the proper height.
I’d like to know your thoughts on what this could be

-- Semper Fi

View patron's profile


13694 posts in 3951 days

#3 posted 08-05-2016 04:50 AM

can’t help much
never used this tool

did find it on google
and here is the teck support

Technical Service by calling 1-800-274-6846

best call them and see if they can help

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View Cajunmarine's profile


20 posts in 1385 days

#4 posted 08-05-2016 12:09 PM

I called yesterday and there was nobody there who knew much about this model. I’ll call again today and hopefully they’ll have someone who can help.

-- Semper Fi

View BurlyBob's profile


6922 posts in 2876 days

#5 posted 08-05-2016 01:51 PM

Gunny, you got me wondering if I even want to buy the one my friend is offering me. He wants a grand for it. I’ve been leaning towards the helical head model. After hearing your story I may stick with that one. Keep me in the loop.

View Woodtodust's profile


71 posts in 2447 days

#6 posted 08-05-2016 01:57 PM

Askwoodman just did a brief video on tuning a 12” Jet Jointer/Planer. If the video doesn’t answer your question I think he would respond to an email.

-- Bill...Richmond Hill, GA--"83% of all statistics are made up."

View Cajunmarine's profile


20 posts in 1385 days

#7 posted 08-05-2016 07:50 PM

Thanks for the heads up on that video Bill. That’s the only video I’ve ever seen made on this particular model. I sent him an email with my questions and also talked with Jet customer support and since there isn’t a dealer within 150 miles they’re sending a tech out to my house to take a look at the machine. The tech seems to think that somehow the cutter head may have shifted which is preventing me from being able to get everything aligned properly. If that is the case he assured me they would rush me out a complete new replacement machine and not just parts to repair this one.

-- Semper Fi

View BurlyBob's profile


6922 posts in 2876 days

#8 posted 08-05-2016 08:02 PM

That sounds like Jet is willing to go the extra mile. I sure hope they get it fixed for you.

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