Dovetail Spline Jig?

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Forum topic by interpim posted 02-08-2009 06:21 AM 3103 views 2 times favorited 5 replies Add to Favorites Watch
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1170 posts in 3423 days

02-08-2009 06:21 AM

I’ve been looking at the Kehoe Dovetail Spline Jig, and I am quite interested in it, except I really have a hard time paying $100 for a piece of plastic and a hardboard TS sled. Has anyone here used this and can give some advice? Or better yet, does anyone know of any off brand clones that I could pick up cheaper?

-- San Diego, CA

5 replies so far

View jm82435's profile


1285 posts in 3707 days

#1 posted 02-09-2009 10:41 PM

I use a shop built one – I really need to take a picture if it. It is easier to make than describe. I started with a piece of scrap 2×4, set the table saw bade to 45’ and about 1/2” shy of the top of the 2×4. set the fence so that the top of the blade was about centered in the board. ran it through once from each end creating a 90’ channel through it. next I crosscut a dado the size of a router collar or bearing if you are using a dovetail bit with a bearing. clamp it to your work and set your router. Remind me I will take some pictures and post them.

-- A thing of beauty is a joy forever...

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1285 posts in 3707 days

#2 posted 03-17-2010 01:19 AM

So did you ever end up with a jig? I made my jig about 15 years ago when I was making the blanket chest for my niece. I needed something that I could use with a router to strengthen the mitered corners on a huge chest. It is pretty basic. I cut one slot, moved the jig, cut the next. I don’t want to take anything away from the Kehoe system – it looks like a good product. People who have used it like it. But if you are a cheapskate like me, this will work also.

This is an end view of the notch cut through the 2×4.

This is the crosscut for the bearing or bushing and bit.


The end result.

-- A thing of beauty is a joy forever...

View spunwood's profile


1202 posts in 2801 days

#3 posted 08-26-2011 09:16 PM

what is the beautiful wood in that last picture?

-- I came, I was conquered, I was born again. ἵνα ὦσιν ἓν

View rustynails's profile


744 posts in 2494 days

#4 posted 08-26-2011 10:35 PM

If you guys look at their web site it talks about how it works and you can watch the video. One thing that has not been mentioned is that how you guys are making your own jigs does work but it is not how the Kehoe Dovetail Spline Jig works. It does use a standard dovetail bit for routing out the key way for the dovetail tail spline but were the Kehoe system is different is in the spline keys. They give you a cutting jig that cuts the splines that is off set just a little so when you make the dovetail keys they are tapered slightly and you more or less are wedging them in from one side giving you a fit that brings the corners together and is stronger than just a regular dovetail key way. (Hope I explained this so it’s understandable)
I like mine and it works good and easy to use.


View SASmith               's profile


1850 posts in 2952 days

#5 posted 08-27-2011 12:03 AM

interpim I have the new kehoe jig that is aluminum not plastic.

rustynails is right the key is in the one degree taper. jm82435’s jig will give you the same look with less strength but it will also be harder to cut the splines to fit tight. With the kehoe the taper is in the spline and the slot so your push/tap the wedged dovetail spline in until it is tight with a perfect fit every time. is one of my projects where strength matters.

With all that said you could build a jig that cuts a tapered slot if you have a good/accurate miter gauge.

-- Scott Smith, Southern Illinois

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