Fast & Simple Biscuit Joiner Jig. PICS

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Blog entry by Gord Graff posted 10-01-2007 11:41 AM 18879 reads 22 times favorited 9 comments Add to Favorites Watch

Hi All,

Like most woodworkers, I embraced biscuit joinery many years ago and like most woodworkers, I never seem to have enough flat usable space to register the joiner off of when joining ¾” material. Using my bench as a flat surface to register my biscuit joiner off of is a crapshoot most days as it is covered with dried on glue drops and whatnots. My solution to this has always been a simple modified bench hook that serves a number of biscuit joinery scenarios. Not only does this jig give you a flat smooth surface to work off of when working with ¾” material, the jig’s fence makes a great stop for working with thicker material when using the biscuit joiner’s fence to register off of.

Would you trust this bench surface to be accurate?

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The jig starts off with nothing more than a piece of 12” X 16” X ¾” melamine and two pieces of 2”X18” X ¾” plywood. With a handful of #8 X 1 ¼” particle board screws you’ve got all you need to make this little jig.

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The first step is to take the 2” wide plywood and cut a ¼”X ¼ “ rabbet along one edge, this will act as nothing more than a place for stray dust to collect instead of the area between the fence and the work piece.

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Photo #4 show the completed fence installed on the piece of ¾” melamine using 4, #8 X 1 ¼” particle board screws. These screws are great for biting into melamine coated particle board or plywood.

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After the first plywood fence is installed, turn the piece over and install the second piece of 2”X18” X ¾” plywood fence on the underside of the melamine, this fence will become our “split fence”. Here is what the fence should look like installed but go to Photo #6 before you start installing this fence as there are a few details (screw placement) you need to know about.

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The fence is installed as one piece (screwed top and bottom) and the 2”X4” cut-out is then marked on the fence, the fence then removed and the cut-out made. I prefer to do it this way so that the fence, when its center section is removed will go back into its original place while remaining square to the sides of the melamine.

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Photo #7 simply shows the placement of the two extra screws that are needed for extra strength in the split fence and they are installed on the opposite side to what we’ve been working on thus far.

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While the split fence is off the melamine having its center section removed, it’s a good time to sand a small radius on the ends of the fence that border the opening. I’m going to be wedging material against these ends and I don’t want them to be sharp and mar my material.

The finished split fence.

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In use, here’s what it looks like using the regular fence and an 8” wide board.

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Again, using the regular fence and a 3” wide board.

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Using the jig in the “split fence” mode to cut a biscuit slot in one half of a mitered joint is a breeze. The mitered 3 ½” wide piece of pine is simply “wedged” by mere operator pressure against the ends of the split fence to hold the piece from moving around.

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Cutting the other side of the miter joint is equally as easy. Note the ample room for the biscuit joiner to travel on.

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Cutting a slot in the end of a 3 ½” wide board that’s cut at a 90 degree angle is no big deal for this jig. All one has to do is side the board through the split fence, wedge it into the opening by applying a little sideways pressure against both fences and cut the slot, it’s that easy and it’s that fast.

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To say that this jig is easy to build and easy to use is an understatement, in real time, it took me no more than 20 minutes to make it.

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It’s my hope that this simple little jig will be able to help someone out there be a little safer, quicker and a lot more accurate than they were yesterday.

All the best

-- Informing & Inspiring Today’s Woodworkers:

9 comments so far

View Thos. Angle's profile

Thos. Angle

4444 posts in 3959 days

#1 posted 10-01-2007 01:04 PM

Another very well done instructional blog. Anyone can make this jig from your work. good job.

-- Thos. Angle, Jordan Valley, Oregon

View David's profile


1969 posts in 4136 days

#2 posted 10-01-2007 02:34 PM

Gord -

Great instructional blog! I can see use for this with a biscuit joiner and the Festool Domino.


View mot's profile


4911 posts in 4033 days

#3 posted 10-01-2007 03:55 PM

Great jig and instruction, Gord. This is a worthy jig to have around the shop. I built one of these by your description on Canadian Woodworking a few months ago. Welcome to Lumberjocks!

-- You can discover more about a person in an hour of play than in a year of conversation. (Plato)

View Grant Davis's profile

Grant Davis

770 posts in 3905 days

#4 posted 10-01-2007 07:16 PM

Hey Gord, fancy meeting you hear. Another fine Jig and explination to go with it.

-- Grant...."GO BUCKEYES"

View Gord Graff's profile

Gord Graff

140 posts in 3891 days

#5 posted 10-01-2007 11:26 PM

Hello All,

Thanks so much for all your kind words. I just hope that somewhere down the road, someone will be able to use and hopefully improve on this idea.

It’s nice to see you Grant, I hope all is well.

All the best

-- Informing & Inspiring Today’s Woodworkers:

View Bob Babcock's profile

Bob Babcock

1804 posts in 4083 days

#6 posted 10-02-2007 12:31 AM

Great idea. Now I just need a biscuit joiner.

-- Bob, Carver Massachusetts, Sawdust Maker

View joinery's profile


1 post in 2933 days

#7 posted 05-13-2010 09:53 AM

Great idea anda fantastic blog, i carry out joinery surey and really appreciate the information. thanks

View arnoldbullock's profile


1 post in 1619 days

#8 posted 12-16-2013 10:45 PM

Hello Gord,
I made this jig with a little modification. I added a fence so as to support work pieces standing on edge or end

View pintodeluxe's profile


5657 posts in 2810 days

#9 posted 12-16-2013 10:59 PM

Yes, that looks like a nice jig for referencing your cuts.
Add a couple toggle clamps to hold the workpiece flat to the surface and you really have a winner.

Thanks for sharing.

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

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