Through Mortise jig for Domino

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Project by Tooch posted 02-16-2017 10:49 AM 2070 views 2 times favorited 12 comments Add to Favorites Watch

So I will be embarking on a mission to make a set of benches and chairs to match my dining room table that I finished in the summer of ‘16. As i learned with the legs on my table, drilling and chiseling mortises on a leg that beefy using traditional methods really sucks, especially with hard maple. So I decided to utilize the Domino to do a bulk of the work, and made this fixture for repeatable cuts.

My legs are squared up, placed into one side, and the marks are transferred to both the top and bottom using a combination square. I make cuts on the top and bottom of the right side (pic r), then flip it over to make cuts on the top and bottom of the left side (pic 5). The results are overlapped cuts, and a perfectly centered mortise. After that, there is still some chisel work, but considerably less chisel work than if done using traditional method with a drill press.

Here is the end result:

Thanks for looking, any comments welcome & questions responded to.

-- "Well, the world needs ditch-diggers too..." - Judge Smails

12 comments so far

View majuvla's profile


13354 posts in 3068 days

#1 posted 02-16-2017 10:51 AM

Super simple and efficient jig.

-- Ivan, Croatia, Wooddicted

View  woodshaver Tony C   's profile

woodshaver Tony C

6224 posts in 3554 days

#2 posted 02-16-2017 12:21 PM

Very clever Tooch! Takes lots of work out of the equation. Nice Tool!

-- St Augustine FL, Experience is the sum of our mistakes!

View waho6o9's profile


8519 posts in 2777 days

#3 posted 02-16-2017 01:05 PM

Great idea!

View doubleDD's profile


7889 posts in 2244 days

#4 posted 02-16-2017 02:55 PM

I like that idea. Sure will save a lot of time. Jigs are so helpful but we often don’t take the time to make them and suffer while making a project.

-- Dave, Downers Grove, Il. -------- When you run out of ideas, start building your dreams.

View Bobsboxes's profile


1369 posts in 2864 days

#5 posted 02-16-2017 05:25 PM

Great idea, I have made lots of jigs for my Domino cutter, but never though about this.

-- Bob in Montana. Kindness is the Language the blind can see and deaf can hear. - Mark Twain

View Tooch's profile


1819 posts in 2077 days

#6 posted 02-16-2017 07:27 PM

Thanks guys. So far I’m pretty happy with the results. One modification I haven’t yet included in the post is that I switched from 3 cuts to 4. I found that the spacing was pretty close and noticed slight roundovers in the middle of the mortise cut. adding an additional cut in between helped alleviate that.

-- "Well, the world needs ditch-diggers too..." - Judge Smails

View bglenden's profile


15 posts in 2796 days

#7 posted 02-16-2017 11:49 PM

How does it compare to a router technique?

View Tooch's profile


1819 posts in 2077 days

#8 posted 02-17-2017 01:34 AM

How does it compare to a router technique?
- bglenden

Very similar I suppose, but instead of plunging a router into the stock a Domino is used, which is a horizontal plunge instead of a vertical plunge.

-- "Well, the world needs ditch-diggers too..." - Judge Smails

View Jim Jakosh's profile

Jim Jakosh

21731 posts in 3306 days

#9 posted 02-17-2017 04:22 AM

Great jig, Mike!! Nice result!!


-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Boxguy's profile


2761 posts in 2468 days

#10 posted 02-17-2017 04:27 AM

Tooch, looks like a method that will save time and work…which is a win/win for any woodworker. Thanks for sending the idea our way.

-- Big Al in IN

View Thom's profile


36 posts in 1624 days

#11 posted 02-18-2017 03:21 PM

Awesome idea the only through tenon I’ve made with my domino wasn’t on purpose ( forgot to change the depth) great information. Thank You for sharing.

-- Thom CT.

View Roger's profile


20952 posts in 3005 days

#12 posted 02-20-2017 01:25 PM

Well done. Gr8 jig

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed.

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