I'm really hoping this works.  I think its Desert Ironwood (old un used knife scales) and scrapped poplar combo.  This is just thrown together in a mess hoping it will make a nice set of pen barrels.  I just hope it works.

This one has failed one of the barrels took a catastrophic chip out OH WELL.  Glue up another one I Guess.

Andrew it looks to me like you are not gluing good smooth pieces together. Properly prepared surfaces to be glued should both be completely flat... and it takes very little glue in the process. The end pieces looks terrible in your picture. May I ask how you true up the wood to be glued together? 

belt sander.....

This also looks like a super glue type of material has been used instead of Elmers or Tite Bond??

Using CA Glue medium and it works for the most part for what I'm doing just simple pens.  It works quite well.

I'll just say wow! Maybe never being around a real wood turner I have no idea what's going on in their world

26 minutes ago, Smallpatch said:

I'll just say wow! Maybe never being around a real wood turner I have no idea what's going on in their world

You can use either.  CA is used because it is instant bond.  If you were doing a production run and wanted 50 in an afternoon then CA is your go to.  If I am doing laminates then wood glue and day or so to cure well is preferred.  The brass tube for the inside of the pen is done with CA glue regardless. Or if you join acrylic to wood CA is best way.

Basically similar to super glue but better.

CA is not a good choice for any laminating job . It is brittle and a shock across the joint can break the bond easily . That is why the guy in that old commercial for super glue did not really wiggle the helmet. Use Elmers or Titebond

+1 on what @Gerald said about the bonding direction of CA (super glue). That type of glue has good tensile strength but weak shear strength. Turning a rough blank, as in your picture, a catch would produce a lot of shearing forces.

 

If you had knocked off the corners (bandsaw or table saw) this may not have happened. 

 

If it is desert ironwood, that is an oily wood and wiping down the mating surfaces with alcohol or acetone would have helped create a better bond.

Edited August 26, 20205 yr by lew

That's exactly what had happened.  One of the barrels survived,   How ever I went into make a cut into the second barrel and next thing I know the blank catches up on the gouge and welp it cracked.  Either way I've got another one glued up getting it ready to go.  At least the mistake will make for good content LOL.

@lewThanks for the words. I could not think of shear and tensile. Guess I had some of this instead of 

3 minutes ago, Gerald said:

@lewThanks for the words. I could not think of shear and tensile. Guess I had some of this instead of 

Don't worry, it was a fleeting moment for me 

The funny thing is I've got it on video too

 

2 hours ago, AndrewB said:

Either way I've got another one glued up getting it ready to go. 

Wood glue or CA instant satisfaction?  Prep time is as important as a sharp chisel.  Flat surfaces glued with wood glue and left to cure will rarely give issues.    

Yep learned that one the hard way.... Oh well LOL.

Heres video from both failures LOL

 

Just thought of a tip after you get another glued blank. These blanks you show are very irregular. Use bandsaw  to take off the rough sides and square the blank. After that you can use the sander to remove a bit of the corners and maybe not get that catastrophic tearout.

Andrew do you have ants in your pants.. What's the hurry. Slow down and things might go a little better to your liking...It looks like you are trying to win a race or something....Not being a turner but turn up the speed a little..