Dovetail joint vs box joint strength test

[ShortyzProductionz]

thats a lot of force! you times it by 3 holy crap

[tconst17]

Hopefully helpful to some, but the best "overall"glue I have found in my 20 years of woodworking is Titebond "Supreme". The downside is that it hard to get. The manufacturer (at least where I am located) will only sell it in mass quantity and not to the "big box stores" so don't bother looking at menards, lowes or home depot. Try a cabinet shop perhaps to seek out a "distributor". "Roo glue" and "Gorilla glue" are both great but somewhat application specific depending on the material.

[BeechAveJoinery]

@OldSchoolSkill Makes it obvious that DT's are more for dry joints and/or looks. Glue has really changed things...

[libertarianbastard]

Well done, sir. Very informative and interesting.

[AReptileMan]

What glue did you use for these?

Great setup.

[pinehillprimitives1]

Very cool demos. I doubt any joint would ever be put to those kind of pressures in say a drawer or box but it just goes to show how strong these two joints really are.

[Jrhoney]

Very interesting and well done. Applied science is the best.

[KevKevAllen]

The only thing about testing joins vertically (against the front of the joint) is that your really only testing the wood and the blue. (I'm referring to box joints only!)

To test the JOINT itself I personally would test from the side. (Twist both arms in opposite directions until one breaks or the joint fails) If your using the setup you have here you'd simply turn the joint 90º in either direction (using the screw as the axis)

Good luck. :)

[skipplet]

You have a very good voice for narration. This has gotta be one of the most boring subjects ever, but I watched whole thing and learned something in the process.

[tehxan]

might also be interesting to compare contact area vs fail strength, in order to find what might be the most efficient finger sizes to use for various woods.

[KrisKross010]

you sir are a genius...

[DJRockinRob]

Love the test rig! i really like the edit ... love to see the second cam in the same shot. Great Job! seriously :)

[apatientspider]

I think it would very interesting to see a testing rig like this used to measure the movement and strength of a wooden c frame like the one incorporated in your second homemade bandsaw. Perhaps you could build a smaller version so as not to waste much wood and glue.

[bobroxshard]

that leaver thing. well put :)

[wolf0805]

You are the Da Vinci of today

[andrewd010]

Always entertaining and informative. Thumbs way up.

[rjal1973]

Matthias,

I think it would also be a great test to see how your joints hold up to a pocket hole joint with screws. Show everyone that wooden joints with proper glue are or stronger than pocket screws.

[Matthiaswandel]

Have done that. Just follow the links to my website and browse around.

[Scrap5000]

This is making e nervous, like it is gonna explode in your face!

[applefan236]

wow, you must have gotten A's in woodshop

[sabecon]

I am guessing that the finest box joint being smaller than the annular ring size gave unequal strength fingers that lead to the more catastrophic failure of the joint. Once the weak ones went, the strong ones were completely overcome. I don't know if this is a bad thing though as it all held together up to the end and in a real case, the longer members will distribute the stress better than the stubs used in the test.

[jjlwis]

wow the box joints and glue are so strong....

[attainableapex]

you should have done more trials. But great job,

i love seeing all the leaver arms and such, ha did you sum the torque?

[Matthiaswandel]

Yes. More details if you follow through to the website.

[hobomnky]

awsome idea i really enjoyed watchin this

[robert3302]

I wonder how the screw jig joints would do with a hardwood with a finer grade. Is that the same jack you used to repair the foundation on your cottage?

[jimham8]

when you used the scales was that lbs or kg? great video too.

[therealandycook]

Awesome video

[deweys]

I am really envious of the amount of free time you posses dude!

[tymothybates]

Well, that's new to me. Amazing! Thank Matthias. ;)

[spinafire]

So the finer joint broke because the wood was thinner. Interesting. I wonder how long these joints would hold up with really strong wood...

[rockhills]

this was pretty interesting. i've always heard woodworkers talk about joint strength but had never seen anyone test joints.

[wolverin007qwet]

thanks for testing, good insight for me

[EuroPowa]

I will be impressed if you build a join that can handle my fat ass xD

[RysioACF]

Can you make a video about how to make joints?

[H057IL3]

@RysioACF

He says at the beginning that he already did -_-

[Matthiaswandel]

The attention span of youtube viewers never ceases to amaze me :)

[RysioACF]

@Matthiaswandel Ouch!

[grubby7911]

@RysioACF maybe if you pay attention you won't have to worry about people making fun of you

[snati4]

@RysioACF HARDCORE COMEBACK!!

[locoken]

@Matthiaswandel It's because you make some of the most interesting videos Matthias and that you a "Homemade" genius! Keep the videos coming, Sir!

[codydorman420]

@Matthiaswandel and your on youtube hahaha

[MShepherd88]

@RysioACF I know for a fact he has already made a video about how to make dovetail joints, and I bet there are others as well.

[deezynar]

Good test, thanks!

This is in line w/ other joint tests I've seen in wood magazines. Strength is increased by increasing the number of interlaced projections which increases the glue contact area.

Thanks again.

[guopeneferozz]

n1. genius

[robiniroven]

lol you know everything about wood :)

[barakuda1111]

Something very relaxing about you. I enjoyed the video :)

[Hexpigge]

great idea, awesome vid :D

[white0typhoon]

O.o that's pretty cool!