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Interesting Joints

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Forum topic by drsurfrat posted 11-30-2020 10:29 AM 902 views 1 time favorited 20 replies Add to Favorites Watch
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drsurfrat

398 posts in 162 days


11-30-2020 10:29 AM

Topic tags/keywords: resource biscuit joiner miter saw router joining traditional japanese joinery traditional chinese joinery lost art jigs mortise tenon dowel floating tenon lap scarf kanawa tsugi luthier joints

Lumberjocks is a wonderful place for gathering ideas. One thing I have trouble mentally collecting is options for specific joints. Dovetails have so many variations that didn’t occur to me until I saw a project here. Add a design that needs a 3 piece intersection, and all kinds of beautiful options are possible.

I searched about 350 forums and projects, but couldn’t find a thread like this, so figured I’d add it and hope it gets populated.

Do you know a design that is stronger than usual? A 3piece joint that will handle the stresses of a chair? One that is just simply beautiful? (I assume Maloof will pop up quickly) Please post it.

I hope it goes without saying that pictures are essential…

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me


20 replies so far

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drsurfrat

398 posts in 162 days


#1 posted 11-30-2020 11:13 AM

3 way lap joint

https://www.youtube.com/watch?v=aKJI_f44v0E

Done by “3×3custom – Tamar” She has merchandise, so apparently she’s an online pro. Her work certainly implies that.

All three parts are the same. Very cool to me.

I didn’t like the rectangular cross section so I added some thickness to make it square and it still works.

The stock is square, every dimension is 1/3, 2/3 or 3/3 cuts. The center slot is 1×3, the front notch is 3×2, the back notch is 3×3. Thats all. The corner is missing but easily enough fitted with a cube.

It is kind of like a bar puzzle to put together, but is solid even as sloppy as I made it. I have no idea where i will use this, but it seems plenty strong enough for almost anything.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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Aj2

3599 posts in 2774 days


#2 posted 11-30-2020 01:23 PM

Ok I’ll play here’s my interesting joint. A double tenon with miters.

-- Aj

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drsurfrat

398 posts in 162 days


#3 posted 11-30-2020 04:08 PM

Wow, that is beautifully executed, too.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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SMP

3203 posts in 881 days


#4 posted 11-30-2020 04:20 PM

Cool topic. Some next joints I want to try are the “secret” mitered dovetail, and the Abe Lincoln “Impossible” mallet. Personally i don’t have any examples of anything besides normal dovetails.

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drsurfrat

398 posts in 162 days


#5 posted 12-01-2020 02:08 PM

I don’t think they have to be yours, we can learn from all kinds of sources.

I think anything by HANN counts here.
https://www.lumberjocks.com/HANN/projects

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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Foghorn

929 posts in 362 days


#6 posted 12-01-2020 04:10 PM

Martin style bridle joint for a guitar headstock.

-- Darrel

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drsurfrat

398 posts in 162 days


#7 posted 12-02-2020 02:30 PM

Musical instruments might be the most challenging of all. They have to take a lot of stress, be delicately small, and look good. Usually I can only get 2 out of 3.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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drsurfrat

398 posts in 162 days


#8 posted 12-02-2020 02:38 PM

Kawai Tsugite

From https://www.core77.com/posts/41624/Japanese-Woodworking-Madness-A-Three-Way-Wood-Joint

It is both a butt joint and a corner joint
My brain itches.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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drsurfrat

398 posts in 162 days


#9 posted 01-06-2021 02:11 AM

Bed rail dovetail ?

The tenon is doubly angled so that it wedges into the mortise that is also double angled. Gravity makes is snug, and it can be separated with a mallet.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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Aj2

3599 posts in 2774 days


#10 posted 01-06-2021 02:20 AM

What about the gap at the top how is that dealt with.

-- Aj

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bandit571

27523 posts in 3659 days


#11 posted 01-06-2021 03:01 AM

What looks like a simple lap joint…

Has a secret inside…

Can you guess what that is..

That when these are slid together…

Nothing shows on the inside, or..

The outside…hmmmm?

-- A Planer? I'M the planer, this is what I use

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Aj2

3599 posts in 2774 days


#12 posted 01-06-2021 03:39 AM

What happened to the tail board it looks like you need to sharpen the teeth on your rat.

-- Aj

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corelz125

2188 posts in 1952 days


#13 posted 01-06-2021 03:49 AM

Shouldn’t hide those dovetails. The sheets hide the top. Cool joint though Mike

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bandit571

27523 posts in 3659 days


#14 posted 01-06-2021 04:33 AM

Is this better..

Pine ain’t the best for dovetail work….

-- A Planer? I'M the planer, this is what I use

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drsurfrat

398 posts in 162 days


#15 posted 01-06-2021 12:14 PM

^ yep, pine ain’t the best for dovetail work.

The gap at the top is hidden by the insert board if tall enough. This prototype was from memory, so it ended up too tall. The blue tape is where the wood should be, so it is covered. I will post the dimension that will work.

-- Mike (near Boston) ... Laziness is the mother of invention, necessity is the mother of exhaustion - me

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