How to Make a Spline Jig

December 2, 2014


Today I’m going to be making this spline jig for my table saw. I’m planning on making multiple frames and since I don’t have a spline jig, I thought it would be a good opportunity to show you guys how I went about building mine. A spline is a small piece of wood that goes in the corners of a picture frame and it tremendously increases the strength of the miter joint. I made my jig out of 3/4″ particle board and a few wood screws. I started out by making a box, but only 3 sides instead. On the outside of the box, I added 2 strips on a 45 degree angle. When placed correctly, it should make a perfect 90 degree angle. Run it through the table saw and you’re all set.


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