newTim's SuperSimpleSplineSetupSystem

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Project by newTim posted 05-18-2012 05:28 AM 5882 views 28 times favorited 9 comments Add to Favorites Watch

Also known as a spline jig. This is to replace a jig that fit my old Unisaw. Instead of runners attached to a bottom plate I had the idea (probably not original) to use the 45 degree supports for the runners too. I attached the 45’s to a straight piece with biscuits then trimmed it on the tablesaw so the bottom of the V was slightly above the table top. I added boards to the front, back, and top (trimmed to 45 to match the cradle) to act as a blade guard. The runner/supports are 3/4” plywood and the rest is 1/2”.

-- tim hill

9 comments so far

View Boxguy's profile


2739 posts in 2412 days

#1 posted 05-18-2012 10:00 AM


I like your compact design. This is a similar jig from my shop. Perhaps readers can compare and combing the two and find ideas that will work for their shop.

You might consider a wider board on the base of your jig and a handle so you can pull it back to you. The wider base lets me run the jig along the fence. This removes all the play in the jig.

If you spread the two sides of your “trough” apart a little, your box will touch both sides, but rests on the bottom. I like to use the back of the trough as a foot so I can stand this large jig out of the way on the floor next to the saw.

I see you are using clamps and a stop. I find that making marks on masking tape lets me lay out all the spline cuts for the box, is faster, and lets me line up cuts just as well.

-- Big Al in IN

View jackthelab's profile


313 posts in 2838 days

#2 posted 05-18-2012 11:51 AM

Cool idea – like the compact design

-- Dave in Minnesota - If it ain't broke, improve it!

View dustyal's profile


1299 posts in 3620 days

#3 posted 05-18-2012 01:32 PM

I’ll need to remake mine… thanks for the ideas. I also prefer using the table top slots vs using the fence as the guide (as I have seen for some designes) for the sled.

thanks for sharing.

-- Al H. - small shop, small projects...

View Roger's profile


20948 posts in 2949 days

#4 posted 05-18-2012 03:16 PM

A jig like this/these is a gr8 addition, and works super

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed.

View eddie's profile


8565 posts in 2759 days

#5 posted 05-18-2012 04:56 PM

like this jig and need one thanks for sharing

-- Jesus Is Alright with me

View newTim's profile


611 posts in 3751 days

#6 posted 05-18-2012 06:17 PM

Thanks all for the kind words and suggestions.

A couple of notes. I purposely designed it this way to see if I could use the V runners to also support the cradle. I spaced them in the grooves using a playing card so they move easily (especially sanded and coated with a little wax) and there is no slop or wiggle. One advantage of this design is to get the bottom of the V as close to the table as possible without touching or riding on the table top. Another is that the box size or width is not limited because it can hang over the edge of the cradle and there is plenty of room to attach stops or spacers.

Since I usually have some kind of stop clamped down (not with spring clamps) I use the clamp as a handle to push the jig with downward pressure so there’s no chance of the jig riding over the blade and to keep the jig between my hands and the blade (can’t be too careful, even with a SawStop). Since the cradle is attached with four screws it can be repositioned to make different types of slots (angled, wider, etc.) with zero clearence to prevent tear out. I will probably add some fine sanding paper to help grip the working piece. Another option is to add the plastic runner tape (I forget what its called) to make it easier to slide the jig.

-- tim hill

View Dusty56's profile


11822 posts in 3833 days

#7 posted 05-18-2012 08:33 PM

Nice jig and explanation : )

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

View sawdustmaster's profile


70 posts in 2971 days

#8 posted 05-19-2012 04:23 AM

very nice job sir, I built a similar one for my router table

-- --Now we are surrounded sir. "Excellent private, now we can attack in any direction."

View StumpyNubs's profile


7656 posts in 2945 days

#9 posted 05-28-2012 12:43 PM

You should enter this into our jig contest! Email photos along with your LJ name to You might win!

-- Subscribe to "Stumpy Nubs Woodworking Journal"- One of the crafts' most unique publications:

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