LumberJocks

Box corner spline jig

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Project by ic3ss posted 958 days ago 4206 views 22 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

653 posts in 2012 days


#1 posted 958 days ago

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

-- Router è ancora il mio nome.

View Dusty56's profile

Dusty56

11605 posts in 2191 days


#2 posted 958 days ago

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

-- When you arrive at my front door, please knock softly but firmly. I like soft , firm, knockers : )

View CaptainAhab's profile

CaptainAhab

214 posts in 1300 days


#3 posted 958 days ago

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

-- Dave www.bluesagehues.com

View kiefer's profile

kiefer

2794 posts in 1170 days


#4 posted 958 days ago

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

1672 posts in 1524 days


#5 posted 958 days ago

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

251 posts in 1280 days


#6 posted 958 days ago

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

14500 posts in 1692 days


#7 posted 958 days ago

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

14615 posts in 1370 days


#8 posted 958 days ago

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

10264 posts in 1608 days


#9 posted 958 days ago

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!!

View Dusty56's profile

Dusty56

11605 posts in 2191 days


#10 posted 957 days ago

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 : )

-- When you arrive at my front door, please knock softly but firmly. I like soft , firm, knockers : )

View ic3ss's profile

ic3ss

251 posts in 1280 days


#11 posted 957 days ago

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

Roger

13062 posts in 1307 days


#12 posted 957 days ago

very kool sled

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

View Dusty56's profile

Dusty56

11605 posts in 2191 days


#13 posted 957 days ago

As long as you are safe , my friend : )

-- When you arrive at my front door, please knock softly but firmly. I like soft , firm, knockers : )

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