 The Clarinet BBoard
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Author: alaes
Date: 2023-09-25 02:41
Would anyone have one of these they can part with or sell? Its for the lower joing though I doubt that matters as long as it has the holes for the needle spring.
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Author: jdbassplayer
Date: 2023-09-25 05:03
It matters quite a bit, most posts are slightly different heights and if the height is off by even a half mm the key will simply not function. Many are also on an angle like the posts for the trill keys. It also matters if it is for a rod or pivot. Also depending on the year the fit will likely be slightly different even for 2 posts in the same location on different instruments.
But ignoring all that, the biggest problem by far is that the thread on every post is different. This means that even if you find the same post from a clarinet that was made 1 serial number apart from yours you will find that it will likely sit at the wrong angle once tightened.
I guess my point is that replacing a post is a much more involved process than one might think and you are almost always better off trying to fix what you have unless you have a large pile of scrap instruments in your shop.
Maybe you can share more information about what you are trying to fix and we can offer some advice?
-JDbassplayer
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Author: alaes
Date: 2023-09-26 01:31
Thanks, JD Bass Player. It is for a 1965 R 13 rod for the C/F, G#/D# keys. I may have to have someone drill the hole for me on the existing one as I tried to do so unsucessfully. The spring broke at the post.
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Author: m1964
Date: 2023-09-26 01:45
If you do not have a good tech around where you live, you probably can remove the post and send it to tech. Or send the whole joint and have the tech re-install the spring and regulate its tension.
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Author: jdbassplayer
Date: 2023-09-26 04:06
There's actually a tool specifically to remove broken springs. I have this one and it has been a life saver more times than I can count:
https://www.musicmedic.com/spring-removing-pliers-1.html
Failing that, it can be dissolved out using alum. You can get this at the grocery store. You simply mix up a saturated solution of alum and water and boil it in a glass or ceramic pot (ideally one you don't care about). Over a few hours it will dissolve away the steel.
In either case, it will be much easier than trying to replace the post.
-JDbassplayer
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Author: clarnibass
Date: 2023-09-26 10:50
A method that can work without the special pliers and without resorting to alum is to use another spring as a punch against the broken spring. Support the back of the post (either on or off the clarinet) and tap on it.
I sometimes do this because some posts just have a specific shape that prevents the pliers from working (and I have three of those with different shapes).
I'm emphasizing it's important to support the post, otherwise there's a (albeit small) risk of damaging/distorting it or even breaking it off the instrument (if done on the clarinet).
Shorten the spring somewhat to get less flex.
If the broken spring is sticking out a little from the post (not broken flush) then first tap (again with support) with a larger punch (or a larger and non-pointy spring).
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Author: alaes
Date: 2023-09-26 17:46
Thanks to all! I think I will try the Alum method and failing that I will purchase the removal tool.
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