LumberJocks

Box Joint Jig

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Project by CueballRosendaul posted 06-13-2014 05:03 PM 1504 views 6 times favorited 6 comments Add to Favorites Watch

I made a box joint jig many years ago, but threw it in the burn bucket shortly thereafter because my joints contained more wood putty than actual wood. Because I needed to build some strong boxes with box-joints (the beehives I’m about to post next!), I made myself a quick and surprisingly accurate jig to make the cuts. It’s not easily adjustable except by giving the key an attitude adjustment or pulling it out and replacing it (held in with two brads) and is built for ¾” cuts. Like most of my projects, I didn’t use any plans or specific dimensions, just an idea and a pile of scrap lumber.

One important thing I learned is to label my outside blades for the stacked dado set. It’s not a really high dollar set, so the cuts aren’t perfect, but if you swap the outside blades, you can end up with a couple grooves in the middle of the joint instead of the corners where they’re harder to see and allow a nice spot for glue to squeeze out. When I was searching online for some information on dado sets, I found the last picture that set me straight.

-- Matt CueBall Rosendaul. I don't think I've ever had a cup of coffee that didn't have cat hair or sawdust in it.





6 comments so far

View revrok's profile

revrok

70 posts in 240 days


#1 posted 06-13-2014 07:34 PM

Thanks for posting. Nice, clean and straightforward jig. Good advice as well! About to start a large project that will have box joints and quite a few dados as well… timely post for me.

-- Tim Royal

View maplerock's profile

maplerock

434 posts in 554 days


#2 posted 06-14-2014 05:26 AM

I like it. I have made a few boxes with bx joints… need to make more. How do you cut the floor groove if or when making a box?

-- Jerry... making sawdust in the Knobs of Southern Indiana

View mcgyver's profile

mcgyver

56 posts in 625 days


#3 posted 06-14-2014 04:52 PM

like the jig and the hive.

-- Mcgyver

View cajunpen's profile

cajunpen

14432 posts in 2820 days


#4 posted 06-14-2014 07:30 PM

Nice project. I’m like you, I always start a project by the “seat of my pants”, no plans. Usually works out, but sometimes it gets hairy :-)

-- Bill - "Suit yourself and let the rest be pleased." http://www.cajunpen.com/

View CueballRosendaul's profile

CueballRosendaul

301 posts in 894 days


#5 posted 06-15-2014 11:24 AM

Jerry, the boxes I’ve made so far have been crude, so I just run the dado all the way to the end and fill the hole with a plug of the same wood sanded to fit. If you do it well, you can make it invisible, but the proper method is a stopped dado which sometimes also involves nipping off the corner of the bottom board and a bit of chisel work.

-- Matt CueBall Rosendaul. I don't think I've ever had a cup of coffee that didn't have cat hair or sawdust in it.

View CueballRosendaul's profile

CueballRosendaul

301 posts in 894 days


#6 posted 06-15-2014 11:27 AM

I learned another thing while using this jig to build my hives: mark your boards for inside vs. outside faces so you can orient the board on the jig so that any accidental blowout is on the inside of the box. As I was assembling the hives, most of my boards had some blowout because it was new pine, and I didn’t use a backer board, unfortunately I only rotated the boards when cutting opposite ends without flipping surfaces.

-- Matt CueBall Rosendaul. I don't think I've ever had a cup of coffee that didn't have cat hair or sawdust in it.

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