 The Clarinet BBoard
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Author: bill28099
Date: 2005-02-19 18:08
B22= 1922 Buffet A
B53 = 1953 Buffet Bb
L = Leblanc Dynamique, 1950s
M = Old Malerne Alto likely pre WWII
The first # is rod diameter, the second is the thread diameter
Clar.............B22......B53...........L............M
mm......... 1.90-1.53 . 1.85-1.55 . 1.92-1.66 . 1.92-1.66
"......... .0745-.0605 .0730-.0615 .0760-.0655 .0750-.0655
From the best I can tell the Buffet threads are the same and can be
interchanged although the old rods will not go into a new clarinet.
The new rods will fit loosely in the old.
The Leblanc and Malerne threads are also the same and much
courser then Buffet.
So when I open my Ferree’s catalog what do I order if I want
a die for the Buffet and a die for the Leblanc? They say that
2.0 x .40mm is for Selmer and LeBlanc but give you no hints
what to order for Buffet. From their table I assume I order
a 2.0 x .25mm. And what do I order for actually
making the screws, what they call “Drill Rod, 18" pieces”?
The only sizes that seem to come close to what I need are
.072" and .077"
Any thoughts and experiences on the subject of trying to make
rod screws for antiques would be highly appreciated. I assume
in some cases one has to buy larger stock and machine it to
the proper diameter.
A great teacher gives you answers to questions
you don't even know you should ask.
Post Edited (2005-02-19 18:19)
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Author: ron b
Date: 2005-02-19 23:33
I somehow missed this when you first posted, Bill, but spotted it while "browsing" just now.
During the past year I've been making hinge screws for a sax I'm restoring (personal project). I have a "standard" set of taps and dies which so far has worked well. With your project you might need some metric ones, I don't know for sure. I think Ferree's just added a bunch of sizes to their rod selection but machine shop suppliers are a good source too. I use drill rod, the end to be threaded turned on the metal lathe and then die-threaded. If you have some really oddball thread size, you might be able to do it on a metal lathe... make a tap, lathe-thread the rod. Not an easy task, but it can be done (verrry carefully).
An alternative might be to re-tap the post (pillar) to a more "standard" thread.
- r![[cool]](http://test.woodwind.org/clarinet/BBoard/smileys/cool.gif) n b -
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Author: Gordon (NZ)
Date: 2005-02-25 13:28
Bill, to identify the thread for which you need a die, you need to measure both the outside diameter of the thread, AND the pitch, the latter normally measured with a 'pitch gauge'. The pitch is measured in mm per thread for metric threads, and threads per inch for imperial.
With split button dies, the diameter can be altered a little by how they are tightened within the holder.
Somewhat less common metric thread sizes are common in clarinets. Some threads used for older instruments were most unorthodox, where dies were specially made, at expense too great for most technicians to ever consider.
Ferree's list of dies is semi-comprehensive, and their suggestions for some brands are IMHO, superficial to the extent of being misleading.
"...I assume in some cases one has to buy larger stock and machine it to
the proper diameter. "
I think it is more common to use the closest diameter available for a snug fit in the post - and swedge/ream/lap etc to get the pivot tube fitting snug. You would need centreless grinding machinery to reduce the diameter of drill rod while keeping it consistent, unless you had a lot of time for trial and error.
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Author: Jack Kissinger
Date: 2005-02-25 13:37
If you haven't already, I suggest you try calling Ferree's and asking them. I have always found them knowledgable and helpful.
Best regards,
jnk
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Author: BobD
Date: 2005-02-25 14:17
Although I haven't yet attempted making my own screws I look forward to the challenge. Gordon above probably knows more about the subject than anyone else here so no comments from me are appropriate. Centerless grinding is probably way out of the picture for any home machine shop....although I see Micromark now offers a grinding attach for their lathe....but I sure wouldn't want to get grinding particles around my work area. Wishing you lots of luck in your quest.
Bob Draznik
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