Question about Delta JT160 Shopmaster 10 Amp 6 Inch Benchtop Jointer

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Adjusting the outfeed table on the Delta Model: JT-160

I am unable to correct a .006'' drop on the side opposite of the fence, close to the cutter head of the outfeed table. I have the fence squared within .001'' to the infeed table, but I cannot adjust the positioning set-screw enough to raise the outfeed table to meet as required. The result are surfaces that are not aligning as the should after a cut is made. If I'm understanding this design as I should be, I should be able to make the correct set-screw adjustments in question, and then take up any difference of the other set screws that may have changed and then have a sound and square set up. Another thing this unit is doing is not cutting the latter section of a long board when light passes are taken. However, I suspect this is due to fact of the outfeed tables misalignment.

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  • Rick Wymer
    Rick Wymer May 11, 2010

    Do You have the JT160, or the JT160R ??
    Have you checked to make sure that the Cutterhead Knives are Straight & True Across the Length of the Cutterhead? You may have to Loosen your Outfeed Table all the way out, and Clean the Tracks (called "Ways")...Have you Tried to Raise the Outfeed & Infeed Tables to a Height above the Cutterhead and Make Sure they are Level with each other across the entire Length of these Tables?
    Have You checked to Make sure That the Cutterhead Knives are the SAME Height across the Width of the Cutterhead??
    Are You Turning your Work-piece end for end on each passing cut? Are you Using a "Featherboard" to Hold your Work-piece flush to the table?
    The Outfeed Table should be adjusted to the SAME Height as The Top of The Cut ( I use a Long Straight-edge Level 4 footer myself). Are you applying the Same Downward Pressure on Your Work-piece for it's entire Length?
    (I have a 12" Delta Jointer in addition to a Complete Woodworking Shop)
    If you could provide me with The EXACT Model of your Machine, I could go over the Service Manual, and perhaps get you running True again.


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  • Master
  • 1,996 Answers

Sometimes you just have to shim them. If you've worked the gibs and can't get any more adjustment out of them, you might try buying some thin brass or copper metal stock (you can get it in rolls at Hobby Lobby) and use it as a shim to hold the table in the appropriate position.
It sounds crude, but that was the only way I managed to get my industrial 6" powermatic to true up.
Also bring the infeed table up to zero, aligned exactly with the outfeed table and check with a known true straightedge. This will help you to keep a clear idea in mind of which direction to move things when you're making adjustments.
If you can get the edges and diagonals straight, you're well on your way to straight cuts.
Make sure beforehand that the surface you're fixing to is flat and you're not clamping the machine down in a way that's torqueing the base.
Castings just aren't rested long enough these days before the surfaces are ground, and things twist a bit sometimes. You may be working with a surface not flat, and unable to get it perfect.
Good luck. I hope that helps a little.
You may need to use an auxiliary roller stand to support the outfeed of long boards to keep the weight from causing a droop that lifts the tail off the tables and prevents a straight cut.

Posted on Mar 28, 2009

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Instruction manual is here.

Exploded diagram is here.

I'm pretty sure you're saying your planer tables are not coplanar.

http://thewoodwhisperer.com/jointer-setup/ is worth watching. Despite his comments about a level, a decent level works fine for making sure your tables are flat and coplanar on smaller units like this.

On more expensive planers there are gibs that can be adjusted to fix this issue. Your part list doesn't list any gibs, so it looks like you will have to loosen the screws holding the infeed or outfeed table in place and shim it. You can use a metal feeler gauge to figure out how much need to shim it.

Also, if you're still in warranty, Delta may be able to replace your unit. If you're going down this route, I'd recommend you take a level and your unit into a service center so you can show them the problem.

Be aware that the replacement "could" be worse than the original. Be sure to check it. I recently waited 6 weeks for a replacement fence for my jointer (mine developed a twist) and the new one had a 3/8" bow in that was ridiculous.

Unfortunately the Shopmaster line wasn't Delta's greatest and there have been a lot of problems with them. It might be worth keeping an eye on craigslist in your area, as decent prices can be had on jointers fairly regularly.

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The infeed table is supposed to be adjustable up and down to remove different amounts of material.

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