Mortising Jig

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Project by dhg posted 08-03-2009 02:08 AM 5794 views 24 times favorited 18 comments Add to Favorites Watch

I’m working on a design for a combo bookcase w/blanket storage and am going to use mortise and tennons for some of the joints and have had the plans for this mortising jig for over 4 years just waiting to be made. It’s from the April ‘05 Workbench mag. I just couldn’t see buying one and this seemed like it would do the trick. It seems to work very well. With a 3/8th” bit the mortise can be up to 6 1/2” long. You can use any size bit that you need. I was just trying the jig out with some scraps and the 3/8. The last pic is what I’m using to cut the tennons.

The jig has quite a bit of adjustment capabilities in moving the router in and out plus the size of the material being used could be quite large.

Some of the knobs and the hold downs I made myself. Sometimes I have a little too much time on my hands and plus I’m Cheep.

-- Talent on Loan from God - Rush Limbaugh

18 comments so far

View woodworm's profile


14477 posts in 4874 days

#1 posted 08-03-2009 02:56 AM

Thoughfully built jig. Great work!

-- masrol, kuala lumpur, MY.

View moshel's profile


865 posts in 4967 days

#2 posted 08-03-2009 02:56 AM

This is a very nice jig! is it rigid enough?

-- The woods are lovely, dark and deep, but I have promises to keep...

View dhg's profile


197 posts in 4996 days

#3 posted 08-03-2009 03:03 AM

Thanks for the comments guys.

moshel, so far it seems ridged enough. I was worried about it while I was building it and figured if it wasn’t, there is room enough on the back to put a couple of gussets.

-- Talent on Loan from God - Rush Limbaugh

View a1Jim's profile


118296 posts in 4860 days

#4 posted 08-03-2009 04:05 AM

View Innovator's profile


3589 posts in 4697 days

#5 posted 08-03-2009 05:34 AM

Nice looking jig, good photos make it easy to duplicate.

-- Whether You Think You Can or You Think You Can't, YOU ARE RIGHT!!!

View Russel's profile


2199 posts in 5222 days

#6 posted 08-03-2009 12:36 PM

Nicely done. Your attention to detail is shown in how you made your own knobs and hold-downs. I really like the tenon fence and am thinking I should make one.

-- Working at Woodworking

View cabinetmaster's profile


10873 posts in 4841 days

#7 posted 08-03-2009 12:40 PM

Great looking and functional jig. I might have to copy that myself.

-- Jerry--A man can never have enough tools or clamps

View ratchet's profile


1391 posts in 5070 days

#8 posted 08-03-2009 02:34 PM

Very nice. The mortises look first rate. Thanks for sharing.

View dhg's profile


197 posts in 4996 days

#9 posted 08-03-2009 03:12 PM

Thanks again guys for the comments.

I forgot to mention that the horizontal material support can also be rotated vertically to route a mortise in the end of a work piece. This feature is what drove the height of the jig which is about 14”.

Mortising Jig

-- Talent on Loan from God - Rush Limbaugh

View douglbe's profile


375 posts in 5244 days

#10 posted 08-04-2009 01:19 AM

Nice work, the jig looks like it should hold up quite well. I really like the home made hold downs and wing nuts, I have made similar ones for myself. They’re fun to make, work very well, and like you said, cheap.

-- Doug, Reed City, Michigan

View jockmike2's profile


10635 posts in 5530 days

#11 posted 08-04-2009 05:18 PM

Great jig, looks like it works real good. Have to make me one. Like the home made hold downs too. Like everyone else.

-- (You just have to please the man in the Mirror) Mike from Michigan -

View olddutchman's profile


187 posts in 5218 days

#12 posted 08-07-2009 07:42 PM

That is a well thought out and cleaver tool that you have built. The router base that the router mounts to, is that a mount for a router table, and modified by you! I like it a lot.

-- Saved, and so grateful, consider who Created it ALL!!!

View dhg's profile


197 posts in 4996 days

#13 posted 08-07-2009 09:36 PM

olddutchman, thanks for the comment. i can’t take credit for the design (wish i could) but it’s from Workbench Mag. the base for the router is custom for my router from a piece of phenolic hard plastic ordered from Highland Hardware.

-- Talent on Loan from God - Rush Limbaugh

View lcurrent's profile


135 posts in 5099 days

#14 posted 09-17-2009 11:23 PM

My mortise jig


-- lcurrent ( It's not a mistake till you run out of wood )

View bigike's profile


4059 posts in 4572 days

#15 posted 02-07-2010 06:34 PM

nice work.

-- Ike, Big Daddies Woodshop, http://[email protected]

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