Co-Planing Jointer Tables

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Forum topic by andersonoo7 posted 10-06-2013 04:36 AM 1938 views 0 times favorited 2 replies Add to Favorites Watch
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22 posts in 1964 days

10-06-2013 04:36 AM

I picked up a GeeTech jointer from CL for a nominal price.

I ran a few boards through it when I got home just to see what was going on. It certainly needed some cleanup…

I did pull out the cutter head to keep from getting WD-40 all over it. However, when I put everything back together, the whole thing seemed outta whack! Mill marks were very far apart, lots of snipe, and even the outfeed table seems tilted toward the fence and cutter head.

The following images show the how the table(s) become less square to the fence as the wood would pass through the jointer:

Infeed table farthest from cutter head:

Infeed table just before cutter head:

Outfeed table just after cutter head:

Outfeed table at end of fence:

I’ve never tuned a jointer before and need help… I’m getting tapered boards! Do I need to shim the back of the outfeed table (don’t know how)? Can someone please explain ‘gib screws’? I read how they may work, but don’t know exactly how to make adjustments with them. Please offer anything you can with the information given. If you need more info, let me know.

2 replies so far

View pintodeluxe's profile


5817 posts in 3052 days

#1 posted 10-06-2013 05:03 AM

Your outfeed table needs to be shimmed. Your jointer is a dovetail way type machine, so you use brass shims in the dovetail ways to even up the outfeed table. Some models have adjustments in the gibs that secure the tables. Make this adjustment first (ie get the outfeed table square to the fence).
After that looks good, use a long straightedge and a feeler gauge to make sure the infeed and outfeed tables are within .002” of coplanar.

Good luck.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View andersonoo7's profile


22 posts in 1964 days

#2 posted 10-09-2013 05:37 AM

When I first purchased this jointer, there was a ton of slop in the outfeed table. Without knowing better, I tightened a nut on the front face of the jointer, the one that holds the table adjustment mechanism in place (is this the table lock nut?). This tightened the table somehow, but also threw the whole thing out of whack.

I have since loosened that nut up just a bit and tightened the gib screws. This seems to have fixed my issue with wide, deep mill marks and excessive snipe. However, when I face plane a board, it turn trapezoidal in two, if not one, pass. Would this have to do with the table(s) not being square to the cutter head in anyway?

As far as I understand it, I must shim the outfeed table to be co-planar with the infeed table, THEN set the knives with the outfeed table? Correct? Based on the condition of these blades I think I’m best off starting the whole process with new blades in place.

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