Through Mortise jig for Domino

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Project by Tooch posted 02-16-2017 10:49 AM 1718 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


11231 posts in 2708 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

5554 posts in 3193 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


8037 posts in 2417 days

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

Great idea!

View doubleDD's profile


6864 posts in 1883 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


1294 posts in 2504 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


1658 posts in 1716 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


14 posts in 2436 days

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

How does it compare to a router technique?

View Tooch's profile


1658 posts in 1716 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

19807 posts in 2946 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


2469 posts in 2108 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 1264 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


20874 posts in 2644 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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