Glue Failure

[berry]

I experienced a glue failure on the Wooden Gear Clock I made a few years ago. What a surprise! The clock stopped a couple of times last week and I could see the weight line was hooked on the one of the two levers that hold the weight ratchet

WGC glue failure 028.jpg (846.2 KiB) Viewed 14416 times

. The one on the right had broke free. The part looked fine so I re-glued. Seems okay. The glue used was Titebond II.

[garys]

In my experience over many years, glue like that seldom fails. But, plainly it did, and I can't offer any insight as to why.

[sehast]

Yes that is a real mystery. My experience is the wood breaks before the glue joint especially with Titbond.

[wa2crk]

I did not have an actual failure but I did have a questionable happening. I cut a test ring of segments for a demo and when it was about three months old I was going to throw it away so I broke it apart. What I found was that the glue on the interior of some of the joints never cured. It still looked like it came out of the bottle. Could have been too old. Sometimes I let it hang around too long. I have never checked for an expiration date when I buy glue but maybe I should.
Bill V

[marcs4095]

What kind of glue was this?
I experienced glue failure with Epoxy on a boat I built many years ago. I switched manufacturers and it also failed.
Only recently did I learn that Silicone spray causes epoxy not to completely set.
I had been using cheap Styrofoam salad bowls for mixing. I now suspect that these bowls were made in a heated form using Silicone spray as a releasing agent, thus contaminating every mix I made. A boat builder friend says that he keeps his epoxy on one side of his shop and his silicone spray on the far side of his shop. Some lessons take a long time to learn.

[Ed in Tampa]

I have said it before and I will say it again silicon has no place in a wood working shop.

On this forum alone we all have read one horror story after another about how silicon has messed up a finish, destroyed a glue joint, or disrupted the normal chemical process many wood working products use to produce positive results.

[JPG]

I have said it before and I will say it again silicon has no place in a wood working shop.

On this forum alone we all have read one horror story after another about how silicon has messed up a finish, destroyed a glue joint, or disrupted the normal chemical process many wood working products use to produce positive results.

Neither does silicone.