Corner spline jig

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Project by sras posted 1402 days ago 6838 views 36 times favorited 28 comments Add to Favorites Watch

I wanted to post my two previous jig projects so I could show you what I built this weekend!

I have been working on a box that needed splines in the corners (more on that later). I knew I needed a jig to help me cut the slots for the splines and I just felt like making a nice one.

The fun thing about this project was that I just used scrap materials and designed as I went. I had to think a bit about how to get the fence adjustment to fit.

The box has two oak ends. There are formica covered plywood side panels and cradle sides (does the formica look familiar?). These panels are positioned on plywood supports on the inside of the oak ends (see pic #2).

The assembly locks into place onto my crosscut sled using one of the pivot holes for the miter fence.

A t-slot rail on the top of the box allows me to position the fence so I can locate the slots accurately.

The box is wide enough for a 5” tall piece to be placed on either side of the blade. If I happen to need slots cut on a wider piece, I can lay a 1/2” piece of stock in each side of the cradle and extend the piece past the V-shaped opening on the left side. I can also re-position the jig along the t-slot rail on my crosscut sled.

I probably spent more time making this jig than I will using it, but I had fun and that was the point!

-- Steve - Impatience is Expensive

28 comments so far

View Ken90712's profile


14821 posts in 1787 days

#1 posted 1402 days ago

Very cool, Look fwd to making one of these.

-- Ken, "Everyday above ground is a good day!"

View mafe's profile


9456 posts in 1688 days

#2 posted 1402 days ago

Such a cool jig, I love the movable fence.
Best thoughts,

-- Mad F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Kent Shepherd's profile

Kent Shepherd

2697 posts in 1885 days

#3 posted 1402 days ago

Great looking jig


-- She thought I hung the moon--now she just thinks I did it wrong

View yuri's profile


135 posts in 2202 days

#4 posted 1402 days ago

Sras, very cool looking jig! I guess it works even better.

View Sodabowski's profile


2001 posts in 1431 days

#5 posted 1402 days ago

Time well spent here!

-- Holy scrap Barkman!

View Chip's profile


1904 posts in 2691 days

#6 posted 1402 days ago

Excellent Steve. This and the table saw sled are amazing pieces of design and engineering. Rolls Royce of jigs. Thanks for sharing them with us.

-- Better to say nothing and be thought the fool... then to speak and erase all doubt!

View Time2beupinAZ's profile (online now)


451 posts in 1560 days

#7 posted 1402 days ago

very nice jig there.

-- Tim - I usally measure twice after I cut......then I know for sure that I cut it short.....

View Gary's profile


1013 posts in 2923 days

#8 posted 1402 days ago

The two jigs together are quite a fantastic pair.
Thanks for sharing your ideas and demonstrating your craftsmanship.

-- Gary, Florida.

View wchips's profile


314 posts in 1686 days

#9 posted 1401 days ago

great looking gig.

-- wchips

View sras's profile


3780 posts in 1728 days

#10 posted 1401 days ago

Thanks for the comments – I should have mentioned that it worked great. The workpiece is held nice and stable. The spline cuts took no time at all. (one of the reasons why I probably spent more time making the jig than I will using it!)

-- Steve - Impatience is Expensive

View DocK16's profile


1139 posts in 2685 days

#11 posted 1401 days ago

Here’s another great design I can steal.

-- Common sense is so rare anymore when you do see it, it looks like pure genius.

View sras's profile


3780 posts in 1728 days

#12 posted 1401 days ago

Go ahead DocK – that’s why I posted it! Immitation is flattery.

-- Steve - Impatience is Expensive

View Greg The Cajun Box Sculptor's profile

Greg The Cajun Box Sculptor

4935 posts in 1907 days

#13 posted 1401 days ago

Very nice jig Steve. A jig that is also a piece of artwork as well as very functional.

-- Every step of each project is considered my masterpiece because I want the finished product to reflect the quality of my work.

View Gerald Miller's profile

Gerald Miller

50 posts in 2550 days

#14 posted 1395 days ago

Way nice and makes my very basic jig look …..well very basic.

-- Jerry Miller

View Woodwrecker's profile


3560 posts in 2174 days

#15 posted 1393 days ago

Steve, this jig looks nicer then most of my projects.
Thanks for sharing it.
Very nice work!

-- Having fun...Eric

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