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Box corner spline jig

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Project by ic3ss posted 09-06-2011 03:03 AM 4640 views 25 times favorited 13 comments Add to Favorites Watch

Just a jig for holding a box on the table saw for cutting splines. The box is one I completed a while ago, before this jig, I used one I threw together. It worked, sort of. This one should work much better for a lot longer. There’s lots of different takes on this jig, each one having different bells and whistles. Mine only has one, an adjustable fence. The idea is that I will clamp it down on my sled up against the fence to square it, and I’ll have 8 3/4” of fence movement, and I can move the jig to cut almost anywhere along it’s length.

- Wayne

-- "I am endeavoring, ma'am, to construct a mnemonic memory circuit using stone knives and bear skins."





13 comments so far

View Routerisstillmyname's profile

Routerisstillmyname

713 posts in 2256 days


#1 posted 09-06-2011 04:02 AM

Awesome. Been thinking about making one of these with rails.
THX for post.

-- Router è ancora il mio nome.

View Dusty56's profile

Dusty56

11684 posts in 2435 days


#2 posted 09-06-2011 04:36 AM

What is being used to prevent tearout as the blade comes through the backside of the cut and what holds the box in place on your jig ?
Thanks

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

View CaptainAhab's profile

CaptainAhab

214 posts in 1544 days


#3 posted 09-06-2011 04:50 AM

Ditto Dusty’s. Also wondering how stable those arms are at extension?

-- Dave www.bluesagehues.com

View kiefer's profile

kiefer

3363 posts in 1414 days


#4 posted 09-06-2011 05:02 AM

I am thinking the same as Dusty and Dave but a good test run will show if it works well .
Please show us the results .

Thanks Kiefer

-- Kiefer 松

View Hawaiilad's profile

Hawaiilad

2191 posts in 1768 days


#5 posted 09-06-2011 09:37 AM

Some of are great at making jigs and others need instructions…I am the latter. And chance you can share a pattern or plan for your jig?

-- Larry in sunny and warm Hawaii,

View ic3ss's profile

ic3ss

262 posts in 1524 days


#6 posted 09-06-2011 09:52 AM

Dusty, If the cut is made between the fence and the jig then there’s no backing to prevent tearout. What I can do, however, is to cut through the jig, then the 45 degree bases will provide that backing. The box can be clamped to the jig with a bar clamp. The jig in turn can be secured to the sled with a hold down or just by hand.

Dave, The fence extension rails are made from 1/4” plywood. They ride in a rabbet slot in the mdf. That rabbet slot is tight enough there’s no slop. The rails are also glued into a rabbet slot I cut in the fence. I cut slotted screw holes in the fence rails, so when they are screwed down the fence is pretty stable. Of course it’s not quite as stable when fully extended. It really is more stable than I thought it would be.

-- "I am endeavoring, ma'am, to construct a mnemonic memory circuit using stone knives and bear skins."

View Ken90712's profile

Ken90712

15304 posts in 1936 days


#7 posted 09-06-2011 11:49 AM

Interesting jig. I like the slide on yours. Here is a basic one I made that prevents you getting tear-out. Well done on yours.

http://lumberjocks.com/projects/38361

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

View helluvawreck's profile

helluvawreck

16033 posts in 1613 days


#8 posted 09-06-2011 12:45 PM

Wayne, that is a very nice jig and nicely done.

-- If a man does not keep pace with his companions, perhaps it is because he hears a different drummer. Let him step to the music which he hears, however measured or far away. Henry David Thoreau

View Jim Jakosh's profile

Jim Jakosh

12334 posts in 1852 days


#9 posted 09-06-2011 02:58 PM

Nice job on that Jig. I’ll have to copy it some day!
Thanks for sharing!!

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Dusty56's profile

Dusty56

11684 posts in 2435 days


#10 posted 09-06-2011 05:06 PM

Thanks for the info : )
I think you’re putting a lot of faith in those rails , especially at full extension.
You stated that they are 1/4” plywood and then the screw recesses look to take about half of that away, leaving you with 1/8” + or – , actually supporting your work. Just a safety concern : )

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

View ic3ss's profile

ic3ss

262 posts in 1524 days


#11 posted 09-06-2011 07:59 PM

Dusty, Yea I came to that realization only after I had the slots and recesses cut and I tried it at full extension. It does bend a bit. However, I came to see that I have one thing that makes it ok: The fence does not have to bear weight, it only registers the box as a stopping point. The fence would only be extended for a very long piece where the weight of the box would be more centered on the base. The box can also be clamped to one of the 45 degree bases to keep it steady.

Also, as it’s not fixed to a miter slot and I can move it around on the sled, this means I can cut anywhere along it’s length using the back angled base to prevent tearout. I’m not restricted to cutting between the base and the fence. I guess I’ll have to make a quick demo piece and get some pictures of it in action.

-- "I am endeavoring, ma'am, to construct a mnemonic memory circuit using stone knives and bear skins."

View Roger's profile (online now)

Roger

15290 posts in 1551 days


#12 posted 09-06-2011 10:35 PM

very kool sled

-- Roger from KY. Work/Play/Travel Safe. Kentuk55@bellsouth.net

View Dusty56's profile

Dusty56

11684 posts in 2435 days


#13 posted 09-07-2011 03:23 AM

As long as you are safe , my friend : )

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

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