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Getting finials to stand up straight

Joined
Jan 17, 2024
Messages
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Location
Pleasanton, CA
Hi, I was commissioned by someone to turn several small wood "bottles" that will be used to contain essential oils. All is working out fine except that I am having a problem with the matching wood finial that will eventually have a glass rod inserted to dip into the bottle. I drilled a tapered hole into the top of the bottle into which the finial rests inside. I can't get the finial (also tapered) to "snap" into the hole and remain upright. One partial solution that I found was to drill a hole into the bottom of the finial and pack in some tungsten puddy, covered over with epoxy. The added weight is an improvement, but the finial just doesn't seem to snap into place and stay straight. I have attached a pic of one of the samples. Please let me know if any of you have suggestions.
 

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I connect many such things with a drilled straight-sided hole, a tenon turned to fit snugly, and a shoulder. Epoxy into place. I’m imagining a taper would be too much trouble.

Another thing you might do if you have a good way to hold the lid with a chuck is to glue in a finial blank and turn it in place. If the lid turns true the finial has to.

JKJ
 
I connect many such things with a drilled straight-sided hole, a tenon turned to fit snugly, and a shoulder. Epoxy into place. I’m imagining a taper would be too much trouble.

Another thing you might do if you have a good way to hold the lid with a chuck is to glue in a finial blank and turn it in place. If the lid turns true the finial has to.

JKJ
Thanks John, that makes sense.
 
I connect many such things with a drilled straight-sided hole, a tenon turned to fit snugly, and a shoulder. Epoxy into place. I’m imagining a taper would be too much trouble.

Another thing you might do if you have a good way to hold the lid with a chuck is to glue in a finial blank and turn it in place. If the lid turns true the finial has to.

JKJ
I may have misread @Mark Benjamin 's post ... but, I assumed he wanted the finial removable because it was going to have a glass rod inserted to be immersed in the essential oils ... whatever that is !!! :D
 
I may have misread @Mark Benjamin 's post ... but, I assumed he wanted the finial removable because it was going to have a glass rod inserted to be immersed in the essential oils ... whatever that is !!! :D

Or I may have misunderstood. Either way, a snug tenon could fit and be removed with a twist. I’d use a hard, fine-grained wood.

The only essential oil I use is what goes in my gas and diesel engines! It’s essential to keeping them running…
 
Yes, that’s exactly right. The finial will be removable.

In that case, what about threading it? If the wood is hard and fine grained (ebony, cocobolo, dogwood, hard maple, etc) and relatively mall diameter tenon and hole, you can use standard taps and dies to thread both parts. Further harden with thing CA if needed, and re-tap. A bit of wax on the threads can make these easy to screw in and unscrew.

Another option, is a threaded brass insert in the lid and either threads on the finial or a section of brass bolt permanently mounted in the finial, hole drilled first in the end to hold the glass rod. I imagine that would be a first class solution! - very easy to remove and replace. If you don’t have a good way to drill a hole into the end of the bolt, many woodturners have machining capabilities that make this trivial, probably some close to you.

I use brass or SS inserts from Ruth Niles Stoppers (or from the hardware store) for a variety of things that need be taken apart often, say for cleaning, like meat tenderizers with wooden handles. The inserts can be glued into the lid and the threaded rod can be screwed and glued into threads tapped into the end of the finial. (I’d still turn a shoulder on the finial.)

The threads on these are a standard 3/8”x16 which may be fine if your glass rod isn’t too large in diameter, but larger inserts are available elsewhere.

Niles_meat_IMG_7952.jpg
Niles_meat_IMG_7953.jpg

JKJ
 
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