Spline Cutting Jig

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Project by Triman posted 2053 days ago 4546 views 20 times favorited 11 comments Add to Favorites Watch

I made a few boxes last year and got hooked. However, the spline cutting was somewhat tedious. So, I finally broke down and built this jig. Since then, I cut spline slots in about 20 boxes, with 2 to 5 slots per corner. I’m still figuring out how to more precisely place the slot, (especially when cutting at an angle and placing multiple slots), but I’m getting better as I go….I hope. The jig definitely removes a number of variables.

-- Bruce, San Jose, Ca

11 comments so far

View HokieMojo's profile


2098 posts in 2360 days

#1 posted 2053 days ago

looks good. also looksl ike something similar could be used to do dovetail splines on a router table.

View Quentin's profile


47 posts in 2778 days

#2 posted 2053 days ago

I love the idea of putting a stop block on a t-track, I think I’m going to remake my spline jig the same way! Thanks for the idea.

View Russel's profile


2199 posts in 2571 days

#3 posted 2053 days ago

Nicely designed jig. I’m going to have replace mine with something like yours.

-- Working at Woodworking

View jim1953's profile


2672 posts in 2474 days

#4 posted 2053 days ago

Nice Jig

-- Jim, Kentucky

View Dusty56's profile


11644 posts in 2320 days

#5 posted 2052 days ago

Looks GREAT…I think Charlie was looking for an upgrade to his latest jig ….Thanks for posting : )

-- I'm absolutely positive that I couldn't be more uncertain!

View Chris's profile


338 posts in 1989 days

#6 posted 1988 days ago

Looks great. Two things you’ve done better than mine: the stop block and using both slots on the table.

-- Chris

View Triman's profile


50 posts in 2214 days

#7 posted 1986 days ago

Yes, using both slots helps to keep it moving smoothly without any binding.

The stop was added later. I was using a chunk of wood and a spring clamp. I got tired of messing with it, so out of laziness, I added the t-track and stop block. Much quicker and accurate!

-- Bruce, San Jose, Ca

View nmkidd's profile


758 posts in 1805 days

#8 posted 1745 days ago

Looks very useful…..simple construction…..even a I (the guy with all thumbs) could build and use it.
Good job.

-- Doug, New Mexico.......the only stupid question is one that is never asked!........don't fix it, if it ain't broke!

View hasbeen99's profile


183 posts in 2171 days

#9 posted 1744 days ago

“I love the idea of putting a stop block on a t-track, I think I’m going to remake my spline jig the same way! Thanks for the idea.”

What Quentin said! Nice one!

-- "The only thing that counts is faith, expressing itself in love." --Galatians 5:6

View SNSpencer's profile


133 posts in 1745 days

#10 posted 1724 days ago

Looks like I will have to take some pictures of my feather key jig, very much like yours except I installed a “no finger” barrier/cover. There is no way to accidently forget where the saw blade exits the jig on the backside and cause an accident. Even if you do, the area where the blade runs is completely enclosed. Only one suggestion for your jig. Install a “stability” strip on the topside, very front edge. Something taller than your max cut height. That way you have a “bridge” to keep the jig from warping/twisting on the front (new strip) and the back (your existing cradle).

-- Jef Spencer - Refined Pallet -

View Triman's profile


50 posts in 2214 days

#11 posted 1724 days ago

Thanks Jef, that’s a good idea. I need to do the same thing to my crosscut sled. Since I do a lot of 0 degree to 90 degree cuts, I now have a gaping hole at the far end, and eventually, it may break thru, and there would go my stability and alignment!

-- Bruce, San Jose, Ca

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