Flattening jig for router my favorite project

  • Advertise with us
Project by Agentwusabi posted 02-24-2017 04:02 AM 3164 views 23 times favorited 13 comments Add to Favorites Watch

Planing and jointing lumber is crucial to a tight fitting and square project but… a jointer over 6 1/2” gets pricey and a planer can make your material flat but takes special sleds to get the job done. So, I had this out feed table and starting figuring the dimensions I would need to use some 1” conduit and roller skate bearings to make a easy to move flattening jig to plane my lumber up to 3’ wide by 5’ long. This has been the absolute most versatile and useful jig I’ve made so far. I milled the boards for bench I made for my mother because they were cupped and warped so if I ran them through my planer they would have just contoured to that shape so I just shim the up and use my clamps to hold the boards in place then mill them flat. I am working on a dining table and milled some 6”x8” oak boards to 5”x7” with this jig in no time at all and they end up extremely flat and square. I am also in the process of redesigning my linear rails and bearings along with and entirely new x axis bridge which once I’m done I’ll post a new project of it.

13 comments so far

View Ivan's profile


16626 posts in 3882 days

#1 posted 02-24-2017 06:47 AM

There are cases when man realy need this jig (including myself – but my worshop garage is realy to small for it) – nice work.

-- Ivan, Croatia, Wooddicted

View Scott Oldre's profile

Scott Oldre

1128 posts in 4445 days

#2 posted 02-24-2017 01:58 PM

I like this idea. I’ve done a planning of a slab before using the technique, but I like your thought process with the bearings and movement. Nicely done. really like the clamping porcess.

-- Scott, Irmo SC

View JimInNM's profile


333 posts in 2231 days

#3 posted 02-24-2017 02:28 PM

Waiting for your improved plan although I don’t see a need for anything better than what you’ve shown here. Hope you give a detailed description of the blocks that hold the wheel bearings as they appear complicated but critical to the project…Jim

-- JimInNM........Space Case

View builtinbkyn's profile


3027 posts in 1955 days

#4 posted 02-24-2017 03:44 PM

That’s a really nice design. Looking forward to seeing the redesign :)

-- Bill, Yo! Brooklyn & Steel City :)

View waho6o9's profile


8997 posts in 3591 days

#5 posted 02-24-2017 04:52 PM


View MorganTS's profile


3 posts in 2236 days

#6 posted 02-24-2017 05:55 PM

What router bit do you use for big pieces?

View cicerojoe's profile


64 posts in 4460 days

#7 posted 02-24-2017 07:24 PM

That kind of looks like a integrated down draft table. Is It?

-- John from the Cherry Valley Studio in NY

View SteveMI's profile


1167 posts in 4308 days

#8 posted 02-24-2017 07:30 PM

I do it a little differently, but same concept. Only a 6” jointer and 14” planer in the shop. Since I make smaller things I only needed the length to be 4’. The twisted, warped and curled boards aren’t that easy even on a wider jointer.

I just route a 1” slot on each side of the board on the edge until it is flat for the wood length and then put “flat” wood strips in the slots. Then I plane the untouched side until flat using the strips to give the planer a flat reference. Next is to flip it, remove the strips and plane that side. I use hot glue on the strip sides.

There was an article in FWW several years ago about just using shims to get the top of the rough board as flat as possible to an underneath flat sled and then run it through the planer.


View helluvawreck's profile


32122 posts in 3881 days

#9 posted 02-24-2017 10:54 PM

It looks like a good practical jig. It’s a great addition to your shop.

helluvawreck aka Charles

-- helluvawreck aka Charles,

View Agentwusabi's profile


19 posts in 1479 days

#10 posted 02-24-2017 11:49 PM

I use a 1 1/2” freud router bit and man does it make short work of it. 1-1/2” (Dia.) Double Flute Straight Bit (Double Grind) The table top was originally made to be an out feed table for the table saw and an assembly table.

View kocgolf's profile


408 posts in 3192 days

#11 posted 02-25-2017 02:01 AM

I used to have a similar setup for slabs but it was a casualty of a house move. I have never seen it done quite like that with the pipes and roller wheels. I like it! I think when it comes time to build a new one, I might just steal this design. Very cool. Thanks for sharing!

View Agentwusabi's profile


19 posts in 1479 days

#12 posted 02-25-2017 03:52 AM

Here’s the first design change, I made new linear bearings with 5/16” rods connecting the 2 halves so that I can loosen or tighten them to fit the rails better. The second change is the linear rails, I made the supports 2 1/2” tall which adds a lot more stiffness to them. I had to use a piece of wood with a hex cut out on the end to hold the nut so I cold get the bolts tightened from the supports to the rails.

View canadianchips's profile


2632 posts in 4011 days

#13 posted 02-26-2017 04:53 AM

I want to make one SOMEDAY ! I think a person would get a LOT of use from it.
Looks like a Ron Paulk table design underneath, another useful idea !

-- "My mission in life - make everyone smile !"

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics