Re-Sizing Glued Planks of MDF

It sounds like you just stacked them, right? Not edge glued. If so, why joint them at all? assuming that you have only a small overlap, just butt the edge against your TS fence, true up one edge, flip it around, and true up the other.
The glue, if completely dry, shouldn’t gunk up the blade.

-- Government does not solve problems; it subsidizes them.

Jim,
That is my original plan. I have heard/read bad things about jointing/planing MDF, as it tends to dull blades rapidly. And besides, the stack only comes to 2.25in thick and the 10in TS handles that with ease. The TS is also the easiest of the three to clean up if gunking does occur.

-- HorizontalMike -- "Woodpeckers understand..."

Don’t use the jointer. You’ll trash the knives. That stuff is really tough on knives. Wanna know how I found out?
Bill

-- bill@magraphics.us

I glued up two layers of 3/4” MDF and topped them with a 1/8” layer of hardboard for the router table extension on my table saw; during the glue up I kept the layers flush on one edge and then squared everything to that with the table saw. I used a 60 tooth Freud Diablo that I picked up from HD and didn’t have any problems other than the insane amounts of dust that the saw generated. Fortunately the shop has a garage door so I just wheeled the saw out into the driveway. The shopvac/dust deputy combination barely kept up; being outside kept the residual out of the shop and my lungs.

-- A man who carries a cat by the tail learns something he can learn in no other way. - Mark Twain

10-4 on the DUST! I started squaring off one of my 3-stack of MDF and even with the HF DC w/separator very fine dust just shot out and back at the operator (ME!). My Freud 50T Combo does not seem any worse for the wear, BUT, with this being my first MDF project it sure comes at a heavy price lung wise ;-)

Thanks for the input guys…

-- HorizontalMike -- "Woodpeckers understand..."