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case mitre spline jig

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Project by wildwoodbybrianjohns posted 09-14-2019 01:47 PM 787 views 2 times favorited 12 comments Add to Favorites Watch

This is yesterday´s project, jig for making case mitre splines. I got the basic design from woodcraft, but their jig just rides against the fence and no runner; so I modified it some so it saddles the fence, and this way, cant go anywhere except where I want it to go.

If anyone is interested in making one, I suggest you pay very close attention to making it perfectly square.

This jig can also be used to cut mitres without having to tilt the blade, though I prefer to do so on my crosscut sled, as stop-blocking for repetitive cuts is less hassle.

Oh, and in case anyone is wondering, the blade shown here was an ATB that I had professionally filed down so it cuts perfectly square grooves, in other words, an FTG.

-- Wildwood by Brian Johns: It is wiser to find out, than to suppose (S. Clemens)





12 comments so far

View therealSteveN's profile

therealSteveN

3846 posts in 1078 days


#1 posted 09-14-2019 07:21 PM

Nice jig, just limited to only that angle. Made upright you can then tilt the blade for whatever angle you like. For those the best “jig” IMHO is a plain old tenoning jig, which allows all the adjustment you need. There was a huge movement away from them, which I never truly understood. Most of the good ones can be had for just over 100 bux, and the firepower they give is worth way more than that to me.

I probably really am a dinosaur?

-- Think safe, be safe

View wildwoodbybrianjohns's profile

wildwoodbybrianjohns

287 posts in 51 days


#2 posted 09-14-2019 09:30 PM

Well, I do have a tenoning jig also, which I use for alot of different cuts. And which, I also made myself for next to nothing. Why pay a 100bucks for something I can make and is just as reliable?

The jig above I made solely for case mitre splines, and the whole point here is that I dont have to tilt the blade! I dont have to check with the digital to make certain Im at 45º, nor do I have to check again when I set it back to 90º

For boxes, one seldom needs to cut at an angle other than 45º when adding case mitre splines, anyway. If I need to cut 22.5º, or 30º, I can just make the jig for it, then always have it.

Also, IMO, a tilted blade is a less safe blade. I still have all my fingers, barring a fraction of a fingertip which was eaten by a jointer when I was a pothead apprentice many moons ago.

-- Wildwood by Brian Johns: It is wiser to find out, than to suppose (S. Clemens)

View therealSteveN's profile

therealSteveN

3846 posts in 1078 days


#3 posted 09-15-2019 02:36 AM

Huh, never thought of blade tilt as unsafe before. I guess all the angles are if you get your fingers involved, right. Heck I even have all the tips. About 55 years of trying, no success. Or I suppose if you insist on trapping things under the blade.

I like the Tenon jig I have because I can dial in the placement of where the cut lands, on different thicknesses, that is hard to pin down on the home made ones I have seen. They do have a tilt of their own, but using a Wixey I can make the angle a lot more exact with blade angle adjustment. Being able to move the base in, or out has me starting so it will make full sized angles, rather than one that often starts in the middle of the piece of stock.

Everyone has their likes I guess. I agree with trying to make jigs ho made though, it’s just if I can’t make one I feel is better, than what I can buy. I’ll buy, because all you really suffer is accuracy.

-- Think safe, be safe

View mel52's profile

mel52

1017 posts in 769 days


#4 posted 09-15-2019 04:25 AM

Nice looking set-up. Great job !!! Mel

-- MEL, Kansas

View wildwoodbybrianjohns's profile

wildwoodbybrianjohns

287 posts in 51 days


#5 posted 09-15-2019 08:29 AM



Huh, never thought of blade tilt as unsafe before.
- therealSteveN

Have you not noticed, with your vast experience ( a compliment, not being a smart-ss), how the blade has a tendency to want to pull the stock into it when passing through on an angled cut?

I have the bosch gts10xc TS, so I cant use any standard jigs because bosch had the bright idea to use non-industry standard mitre slots on their saws.

-- Wildwood by Brian Johns: It is wiser to find out, than to suppose (S. Clemens)

View awsum55's profile

awsum55

642 posts in 1013 days


#6 posted 09-15-2019 03:38 PM


Huh, never thought of blade tilt as unsafe before. I guess all the angles are if you get your fingers involved, right. Heck I even have all the tips. About 55 years of trying, no success. Or I suppose if you insist on trapping things under the blade.
- therealSteveN

I wish I saw this post before I tried to cut under the blade. I never even gave it a thought that it might be dangerous unless I was trying to cut something small and my hands would be too close to the blade. Here was the lesson I got on Labor Day. https://www.lumberjocks.com/topics/306071

-- John D, OP, KS

View wildwoodbybrianjohns's profile

wildwoodbybrianjohns

287 posts in 51 days


#7 posted 09-15-2019 04:54 PM


I wish I saw this post before I tried to cut under the blade. I never even gave it a thought that it might be dangerous unless I was trying to cut something small and my hands would be too close to the blade. Here was the lesson I got on Labor Day. https://www.lumberjocks.com/topics/306071

- awsum55

Hey Awsum, welcome back. Hope ur doin alright.

-- Wildwood by Brian Johns: It is wiser to find out, than to suppose (S. Clemens)

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