|Forum topic by Lazyman||posted 02-24-2016 03:19 PM||1430 views||0 times favorited||29 replies|
02-24-2016 03:19 PM
I’m making a wooden beer mug from quarter sawn white oak for my cousin by gluing up 12 staves to form a cylinder and then turning it to shape on my lathe. I’m using a stainless steel insert for the the inside and because the wood will probably get wet when washing decided to use Titebond 3 since it is supposed to be waterproof. After getting the outside and inside turned to final shape, I parted it off to final length. I needed to clean up the bottom where my parting was not quite flush and also wanted to chamfer the bottom slightly so the mug sat just on the outside edge. I clamped the mug in my chuck, this time from the inside, supported the bottom end with a slightly conical face plate in my tail stock and stared flattening and then working on the chamfer. I was almost done when I got a very minor catch and the mug split exactly in half along 2 glue lines. With the exception of a sliver near the top where the mug was tapered to its thinnest point, the failure was completely in the glue joint. You could see glue residue along surfaces on both sides with no gaps.
I’ve never had a glue joint fail before when using standard wood glue. When I have had something break, the wood fails before the glue joints do. This is my first time using Titebond 3 and my first time to use white oak. Has anyone else experienced this sort of failure of TB3? Just wondering if it is not as strong as regular PVA. I am also wondering if my glue surfaces were too smooth for the white oak or if the closed cell nature of white oak didn’t allow the glue to penetrate to create a strong bond somehow? Any thoughts about what might have caused the failure?
(Note that because it was such a clean break, I sanded the glue residue from the surfaces and glued it back together with epoxy so I am able to salvage the work. It will also have some steel rings like a barrel so even if the glue fails in the future the rings should hold it all together. Instead of turning the bottom, I decided to use my router to get the chamfer. I will also glue the mugs handle on with epoxy now that I don’t trust the TB3. )
I was going to post a before and after disaster picture but I’m getting an error from Lumberjocks website.
-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.