Bryan’s Router Mortising Jig

Inspired by The Wood Whisperer Episode #63 (Gadget Station pt 6) where Marc uses a one time use jig for installing a SOSS Invisible Hinge (something I’ve done before, only I did it the hard way!), this jig has stops for positioning it on the work pieces and stops to control the router travel for the mortise length. It only takes an hour or two to build. I recently used it for the leg joinery on the Adirondack chair and it worked great. Plus there is a sketchup model and a video on how to make it!

For material, this jig requires:
•3 – 1/4″ x 1 3/4″ T-Bolts
•2 – 24″ Long T-Track Sections
•3 – 1/4″ Winged Knob
•3/4″ Shop grade plywood

Download the SketchUp File


  1. Frank September 2, 2012

    Okay, I read the blog entry, looked closely at the pictures, and watched the video. Nice jig. I’ll probably end up copying it when the need for a router mortising jig arises for me.

  2. like the jig, i’ll (try) and make one ….

  3. Texfire September 2, 2012

    Nice jig. :)

  4. Stephen Spence September 2, 2012

    Will definitely be building this one . Nice jig. Tangent, but how are you liking that Bosch router?

    • Yes, the bosch router. I actually do really like my bosch routers. I have a couple different ones, the latest having multiple bases but the power switch on the handle… which is a great feature.

  5. Sandra September 2, 2012

    Nice job on the video. Thanks for including it.

  6. John Davies September 3, 2012

    Nice job, I like that a lot. If you were to put a piece of scrap on the opposite side, underneath the two stops, before clamping you would get a more stable platform for your router base ;-)

  7. Bob September 4, 2012

    Nice jig, thanks for sharing it.

  8. Riley R September 4, 2012

    Very Nice! I wish i would have watched this last weekend. I will be building this. Thanks

  9. Ryan September 4, 2012

    Wow i was just about to spend $200+ on a jig just like this one.
    now i can make my own for a lot less.

    My wallet and I thank you.

  10. Lone_Wolf September 4, 2012

    Thank you for letting us see your jig. It looks like a great design. I’ll have to give it a try.

  11. Justin Erb September 4, 2012

    Very nice! I have the same router and love it. After watching the video I’m going to soon have the same jig. I’ve debated buying one for sometime but will building one instead. Thanks

  12. Sean September 4, 2012

    Nice concept for a mortising jig. This looks like one that is versatile and will last. I am about to start a small dresser for my girlfriend and I know I want to try mortise and tenon joints for the first time. I wasn’t sure witch way to approach the mortises, by hand, with a mortising machine, or with a router. I don’t have a mortising machine and don’t want to spend the money for one just yet. After watching Marc cut mortises with a router and now seeing this jig has made up my mind. Now I just need a proper vise for my “bench”

  13. I like the jig! The way it is constructed should afford years of service. It’s also another good example of a scrap wood project. (Hello, I’m Mark and I’m a scrap wood hoarder)

  14. Chris September 5, 2012

    Would it make more sense to run it through the jointer before cutting at the table saw?

    • JGreasy September 6, 2012

      I think it doesn’t make a difference since the far sides of the top and fence dont have to be paralell or co-planar to the near sides to make the jig work.

  15. Nick September 5, 2012

    Nice video. Looks like after you go through the work to make the jig it would be pretty useful.

    Still saving up for that Domino though ;)

  16. Swalton September 6, 2012

    when you drill the key, would it not be better to turn the peice over key up and then it would be stable

  17. Derek Hall September 7, 2012

    Very cool.. thanks for sharing

  18. Barron Bail September 7, 2012

    I like the jig. to make the stops I might try cutting the groove for the key in a longer piece of plywood, installing the key, then cut the three stops from the longer piece at the table saw or by hand on a bench hook. It would save the trimming step and I find cutting grooves seems safer in a longer piece then one the size of the stop blocks.

  19. keith September 7, 2012

    Nice design and exe. – Must build.

    Far cheeper than festool domino and can do many of the same things although more set up time….

  20. Rickterscale September 7, 2012

    Very nice. I’d be embarrassed to disclose how many times I’ve routed right past the (intended) end of a mortise. I may have to make one of my own.

  21. Thank Bryan. I’ve only used a hollow mortise machine and I’ve been wondering how that might be done on a router. I’d love to do them all by hand, but who has that kind of time?!

  22. It may should too complicated/crazy, but I wonder if you could cobine this with the adjustable dado jig from TWW139?

  23. Thanks for all the comments on the jig. I’d love to see what changes other people make when constructing their own. Contact me through my web site if you want to show off your version.

  24. Todd R July 22, 2014

    Thanks a lot Brian, saved me money and it appears as though many years of use. Keep the vids coming, you do a great job demonstrating and explaining.

  25. Bob October 11, 2014

    I made this and used it for some through mortises on a table. Worked great! Thanks for the awesome jig design!

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