Fellow kerfer here. Hardwood furniture. I’ve avoided foaming glues till now. Thought they were too weak. Thanks for correcting that misconception.

@javadshadzi4824

3 жыл бұрын

You got it!

I'm currently in the process of kerfing baltic birch plywood for my own speaker enclosures. I'm using a single sheet of wood for the sides and back. I've gone through quite a few pieces of scrap to dial in my methodology. I won't be using a veener, so my kerfs will be more shallow, and the bending done slower to avoid any kerfs showing on the backside. Great job with those Jintanis. I wish I would have attended Axpona to hear them.

Looking forward to more updates on this project

COol! Love your videos keep up the great work!

"literally indestructible"? challenge accepted!

Fill the kerfage with: 1 part titebond + 2 parts sawdust + 3 parts fine playsand. premix solids, intermix glue immediately before application, solidifies almost immediately, temperamental to sand brand, frighteningly durable when you get things right.

@javadshadzi4824

3 жыл бұрын

I have tried and experimented with this technique, I found it’s very difficult to actually fill the kerfs like that and really not necessary, I demonstrate using expanding polyurethane glue here, it fills the voids and is very strong, nothing more is needed.

Какой клей используете ?

I'm curious how strong it is when the forces are from the inside to the outside. Because the pressure of the air will be from inside out. Standing on top of it doesn't really say anything about that.

@djfirestormx

4 жыл бұрын

But pressure from the inside is minuscule to what people do to the outside from sitting on the box to dropping them. So it does not really matter. As long as its braced it would be really close to a non-kerfed panel, in fact maybe stronger due to the glue/

A link to the speaker Construction, please!

@javadshadzi4824

3 жыл бұрын

Feel free to check out my builds on the Facebook page DIY Loudspeaker Project Pad, all builds are listed under the Announcements Section, thanks!

What brand of polyurethane glue you used?

@javadshadzi4824

3 жыл бұрын

Titebond, Gorilla is also very good

That is interesting but it doesn't really prove their strength since you put your weight on what is structurally the strongest part of the dome shape. Also the cross brace becomes a part of the structural integrity of the piece once you attach it. It is still interesting though but the plywood is clearly compromised and will behave differently from normal plywood in response to several kinds of stress despite still being strong in one specific direction. I would actually like an engineer to discuss this because I don't really know where it would be strong and where it would be weak. For example if you put the dome pointing off to the right and the cross brace on the left and stepped on the structure I bet it would break. Your 185 lbs would break the board depending on the direction of the force. Still interesting, thank you.

@javadshadzi4824

2 жыл бұрын

This isn’t a scientific experiment, it’s a simple demonstration, you should come away from this with a reasonable sense that this assembly still has a lot of strength considering these cuts leave less than. 1/16” of material connecting the kerf sections. I am an engineer and this demonstration clearly shows this assembly as built has a certain amount of strength, it’s not designed to be a strength thesis for whatever it is you’d like to do with kerfing.