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Splined Miter Jig (as promised)

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Project by gfadvm posted 947 days ago 3805 views 87 times favorited 23 comments Add to Favorites Watch

By the time I’m ready to cut splines, I have a lot of time and effort in a project and hate to ruin it at this late stage. This is my last (final) version. I just added the fence saddle after I let it wander off the fence thus wallowing out a spline cut. The big plusses of this jig are: it is very stable, the window allows you to see the blade when setting your cut up, and it allows you to clamp your box to the jig rather than trying to hold it in place. When cutting tear out prone wood I tape a 1/8” thick backer board behind the back edge of the box. I hope this helps others. As you can probably tell it is made completely of repurposed scraps. The blue tape tag says “fill miter slots to keep the sides of the jig from hanging up on a miter slot.This step is not always needed but when the sides are close to a slot I just lay a strip of scrap in the miter slots.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm





23 comments so far

View woodshaver's profile

woodshaver

2738 posts in 1955 days


#1 posted 947 days ago

Great Idea! Thanks for sharing!

-- Tony C , My high school shop teacher said "You can do it"... Now I can't stop!

View boxcarmarty's profile

boxcarmarty

9006 posts in 962 days


#2 posted 947 days ago

SWEET!!! Love the no blade contact and the window at the side. It allows you to keep an eye on things. Heading out to the WoodShack now to give it a spin…..

-- My mind is like lighting, one brilliant flash, then its gone.....

View thelt's profile

thelt

616 posts in 1981 days


#3 posted 947 days ago

That’s probably the best design I’ve seen yet. Added to my Fav’s and gonna make one.

-- When asked what I did to make life worthwhile in my lifetime....I can respond with a great deal of pride and satisfaction, "I served a career in the United States Navy."

View JoeyG's profile

JoeyG

1233 posts in 1227 days


#4 posted 947 days ago

I have been trying to come up with a design that allows easy view of were the blade is. The toughest part these is getting the set up exactly right. I think I will take a look at mine and see if I can modify it to achieve what you have here. If not, it’s getting cold again and the old one will add a little warmth to the house and I will start over using your design. I always tape my corners, which helps with blow outs. Since I started doing this I haven’t had any major blow outs.

-- JoeyG ~~~ http://www.facebook.com/JHGWoodWorks

View woodsmithshop's profile

woodsmithshop

1104 posts in 2147 days


#5 posted 947 days ago

I like this design much better than what I am using now, I’ll have to try this. it looks like more support, and better visual of the project.

-- Smitty!!!

View foneman's profile

foneman

111 posts in 2696 days


#6 posted 947 days ago

I like everything about it!!!! Another project for my “todo” list!!! thanks for sharing!!!

john

View tenontim's profile

tenontim

2131 posts in 2346 days


#7 posted 947 days ago

Nice jig. One suggestion, if the angled pieces were run all the way to the end of the slots (against the saw top), it would provide a back up and help prevent tear out. If you make different heights of slots, you could have extra pieces to install. Thanks for the post.

View Sodabowski's profile

Sodabowski

2002 posts in 1435 days


#8 posted 947 days ago

That’s very clever. Another one added to the faves and to-do-list, thanks for sharing.
And hey, Merry Christmas! :)

-- Holy scrap Barkman!

View Dusty56's profile

Dusty56

11639 posts in 2290 days


#9 posted 947 days ago

I was concerned about tear-out after seeing the pics before reading your post , but
if you only add the 1/8” ply to one side , doesn’t it throw off the spline on the other side ?

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

View b2rtch's profile

b2rtch

4287 posts in 1650 days


#10 posted 947 days ago

I never needed on , most likely i shall never need one yet I like it very much

-- Bert

View rance's profile

rance

4125 posts in 1762 days


#11 posted 947 days ago

I’ve always like the window type jigs so you can see your blade height. Nice job on this one. I also recommend using your backer board on ALL cuts, not just the ones you suspect will give you tearout.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View gfadvm's profile

gfadvm

10591 posts in 1292 days


#12 posted 947 days ago

Dusty, tape the backer board below the ‘window’ and its not a problem. Don’t remember who asked for this last night but I hope it helps. Rance, I usually tape the back side as I get very little tear out using the Freud box cutter set but your recommendation is right on. I just get lazy.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View Porchfish's profile

Porchfish

570 posts in 1134 days


#13 posted 946 days ago

Thanks for sharing ! Good ideas deserve to be used and spread around !

-- If it smells good, eat it ! The pig caught under the fence is the one doing all thesquealing

View Porchfish's profile

Porchfish

570 posts in 1134 days


#14 posted 946 days ago

Just thinking out loud….I like to cut splines on a 10 degree angle 1” from the top and turning the jig around cut a 10 degree spline in the opposite direction and put one centered between the two….I think that could be accomplished if I alter your design and widen the body to span the two miter slots and not use the fence…. I’m just thinking out loud….do you have any thoughts on the idea ? I used the two miter slots when I built by finger (box) joint jig and the stability is “gooder” than I had hoped for…. I’m thinking this would work …might need a clamp from the sides as well as front to back ? love bouncing ideas around ! Oh and if you added a 1/8” piece of scrap for tear out prevention in the back, you could add the same in the front to balance the size of spline cut ? ‘whatcha’ think ?

-- If it smells good, eat it ! The pig caught under the fence is the one doing all thesquealing

View ellen35's profile

ellen35

2557 posts in 2034 days


#15 posted 946 days ago

Thinking out loud too… Wouldn’t it work better (a relative term!) if the back angled piece went all the way down and the front was open so you could see? I, like Len, worry about tear out and changing angles. Just a thought…I like the design, it is far superior to my flimsy one!

-- "Don't let the perfect be the enemy of the good." Voltaire

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