Router Dado Jig

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Project by dakremer posted 02-18-2010 01:24 AM 11818 views 47 times favorited 10 comments Add to Favorites Watch

I know most of the regulars know of this jig – but thought I’d post it for anyone who has not seen this. This is just a simple Dado jig. I made it out of some leftover poplar and some aspen. If anyone has any questions on how to use it let me know – but I’m hoping the pictures show it pretty well.

-- Hey you dang woodchucks, quit chucking my wood!!!!

10 comments so far

View Jim Jakosh's profile

Jim Jakosh

24980 posts in 3914 days

#1 posted 02-18-2010 01:46 AM

Hey that is a very nice jig that you can position anywhere to cut a dado. You could asdd stops to it for making a pocket of a given length, too. I might just borrow your idea! Thanks for sharing.

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

View zlatanv's profile


691 posts in 4043 days

#2 posted 02-18-2010 01:50 AM

I did one a few years ago, works really good. nice job.

-- Z, Rockwall, TX

View dfdye's profile


372 posts in 3846 days

#3 posted 02-18-2010 02:19 AM

Great build of a classic jig. This looks really nice! One thing that I would potentially worry about would be the movement of the wood allowing the jig to get a little out of whack. I typically try and use plywood or MDF for larger jigs that need to be straight that reason, but this certainly LOOKS better than my version of this jig! :) I am probably splitting hairs, though. . . .

One problem I have run into with this jig is if my router bit is not perfectly centered on my base, I get bad results, so be careful! A variation of this is to leave off the top rails (or to back them out a bit) and use a top bearing guided pattern cutting bit. I haven’t done this, but have seen a few references to it. To use it, set up the jig as normal (put the dado material into the center grove and tighten things down), and use an undersized pattern bit to cut the dado in two passes. For example, cutting a 3/4” dado would use a 1/2” pattern bit.

Thanks again,dakremer, for posting this! Great reminder, even for those who have seen it before.

-- David from Indiana --

View RexMcKinnon's profile


2593 posts in 4004 days

#4 posted 02-18-2010 05:53 PM

Nice jig.

dfdye, that a good idea using the pattern bit. The problem with this jig is it is only good for the router it was made for as bases differ in size. Your suggestions would elminate that problem. The thing with using the pattern is that would would have to make sure you have a lot of different length pattern bits or a very think jig so you are sure the bearing always rides on the jig.

-- If all you have is a hammer, everything looks like a nail!

View a1Jim's profile


118104 posts in 4386 days

#5 posted 02-18-2010 06:04 PM

View woody57's profile


650 posts in 4236 days

#6 posted 02-18-2010 07:28 PM

That’s a great jig.

-- Emmett, from Georgia

View dfdye's profile


372 posts in 3846 days

#7 posted 02-23-2010 09:43 AM

Rex, I rarely make more than a 1/2” deep dado, and would typically take a couple of passes to get to that, so I would think a 1/2” deep pattern cutting bit would be ideal for this sort of application. By using 3/4” stock, you could still get 1/4” support on the bearing for a “zero” depth cut. Dropping the plunge on the cut would allow you to make cuts as low as your router would let you. I would seriously doubt that you would want to make more than a 1/2” deep cut regardless! Remember too, that each step down would create a new guide for the bit to ride in, so you could theoretically make an arbitrarily deep cut with only a 1/2” deep cutter! You should only be limited by the length of your collet extender.

Honestly, I forgot the details of how this variation of the jig was built and used since it has been a few years since I saw that particular example, but this seems the logical way to make it work. Again, haven’t used this variation, but wanted to pass it on for those interested.

-- David from Indiana --

View Diggerjacks's profile


2327 posts in 3947 days

#8 posted 05-04-2010 08:50 PM

Good jig

What size ?

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

View dakremer's profile


2748 posts in 3900 days

#9 posted 05-04-2010 11:04 PM

I think its about 3.5 feet long. I don’t remember now! I built it to the size I needed at that time

-- Hey you dang woodchucks, quit chucking my wood!!!!

View Diggerjacks's profile


2327 posts in 3947 days

#10 posted 05-06-2010 06:50 PM

Thanks for the information

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

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