 The Clarinet BBoard
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Author: RAL
Date: 2015-07-01 22:19
I am starting to restore my US$ 6,5 Amati clarinet.
Well, two of the clarinet lower joint pivot screws are really rusted, with the slot almost gone. Taking them out would be a challenge.
However, I am able to remove the keys (the opposing screws are in good shape), and the pivot side is in good shape and not rusted.
I am thinking about just leaving them, as I guess that trying to get the screws out will be messy, with potential damage to the post and the pivot part.
Opinions?
Post Edited (2015-07-01 23:07)
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Author: Caroline Smale
Date: 2015-07-01 23:22
One possibilty is to remove the pillars from body which allows screws to be approached more directly and with really firm pressure. Using heat and releasing fluid can help as is essential use of a PERFECT fitting driver.
Also possible to disolve the screws in (forget solution but frequently mentioned on this board) as long as you have or can get relacement screws.
However depending on what your ultimate aim is the "leave as is" is a useable approach.
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Author: clarnibass
Date: 2015-07-01 23:29
What I usually do and it works pretty much 100% of the time, is use a tiny reversed cone bit in a dental micromotor to recut a slot, but this requires special tools (the only time it failed was when the screw seemed to not be made of steel, or maybe some really soft steel, so any force with a screwdriver completely ate through it, regardless of the slot).
This option can remove and save the screw most of the time, with no damage to the post or any part.
I would also use penetrating oil and heat, which helps a lot. Sometimes it helps if you try to remove it while it is hot (be careful not to hold it with your hand).
If you remove the post you can use alum to remove the screw, but only if you have a replacement, plus this is extremely slow.
Not removing the screw can be a good option. The only down side is that some keys on some models need to have both pivot screws removed to disassemble. Also it means you have rust there, though in most cases there aren't really any close steel parts, except maybe a spring. Anyway it's a low risk and not a big deal.
Post Edited (2015-07-02 09:01)
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Author: Steven Ocone
Date: 2015-07-02 04:08
It would be fine to leave them in. I have removed them with vise grips from the opposite side, but the screw is destroyed in the process.
Steve Ocone
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Author: tictactux ★2017
Date: 2015-07-03 01:38
what Steven suggested. Penetrating oil overnight fro both sides, then vise pliers.
Hint when using a screwdriver: hold the driver firm and turn the whole clarinet instead, you'll have a more constant angle with the driver against the screw head this way. You could even clamp the driver into a vise and use both hands with the clarinet joint. Use leather gloves just in case you slip off...
--
Ben
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