Spline Jig for Narrow Stock

Miter joints are beautiful, but sometimes they can benefit from a little reinforcement to keep them together.
Even with mechanical options such as biscuits, dowels, and possibly even screws or nails, a potentially eye-catching option might be to cut slots across the joint and insert a spline.
For a recent project, I needed a jig to cut splines in narrow stock, so rather than building a big sled like I’ve seen elsewhere, I grabbed some scraps and put something together I could potentially be using for years to come in a matter of minutes.

[@onehandedmaker]

Greetings from Australia
Just discovered your channel and subscribed. I love the variety of topics and projects you create and will go back and watch more videos.
Your workshop is a great backdrop for your videos and the spline jig is so simple.
Regards
One Handed Maker

[@michaelthompson5875]

Thanks for the great idea Matt. Short and sweet and very informative.
Now the question is...what is the project they went in? Looks like a small stand for something. 🤔

[@Mattsbasementworkshop]

Coming soon!

[@mwrcrft]

Nice jig, but for me I use metal screws on my jigs only for glue up clamping and then remove them . Super glue has proven to be very good for end grain holding power. I don't need another blade and cartridge change on my Sawstop.

[@Mattsbasementworkshop]

I thought about that as an issue also. I may revisit removing them, especially if I used thicker stock where I could cut a wider spline. Thanks for watching.

[@pettigrewwoodworks]

Nice! I have a similar, wider one for putting splines in miter corner boxes. I think I'll make your version for frames and such.

[@Mattsbasementworkshop]

I've been thinking of some other projects which will be much wider, so more than likely I'll be making another version to accommodate those.
Thanks for watching!

[@dannegrete8538]

Nice jig. What type of countersink did you use? I’m looking to upgrade mine and the one you used may be the upgrade I’ve been looking for.

[@Mattsbasementworkshop]

It's an Amana No Mar adjustable countersink. I've had it for a few years and absolutely love it, although I don't think "No Mar" is 100% true as I've left a mark or two on material, but it easily comes off.
Thanks for watching!