 The Clarinet BBoard
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Author: bill28099
Date: 2011-11-30 17:20
Attachment: pivot.jpg (22k)
Does anyone know when the design of the small pivot screws for these instruments was changed? The pivots that were just sent to me are certainly not the ones installed on the horn. Attached is a photo of my pivots from a 1994 horn on the top and the new pivots on the bottom.
A great teacher gives you answers to questions
you don't even know you should ask.
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Author: clarnibass
Date: 2011-12-01 06:01
It's a bit tricky, especially with that blurry photo. A lot of Buffet bass clarinets (possibly all of them) have two sizes of pivot screws. They might have changed over the years, but the current one has one smaller with the thinner head and the other a little bigger with the thicker head.
In your photo the two screws look more similar in size than the different size screws of the Buffet bass clarinets. Are they similar except the thickenss of the head and that plastic there? That plastic is just there and if the screws have the same thread and similar size head the new one is likely to fit, possibly with some modifications. Did you measure them with a thread measuring tool or tried it in the post?
The second )new) screw looks like the current design of the small screws. The top one might be the equivilent smaller but older design, so might fit. Maybe you can measure thread and diameter or head and threads?
Did you use a phone camera? If you have a regular digital camera (even an older one) it should a Macro mode and it should be possible to get a photo of these two screws much sharper in better focus, which can help too.
The Buffet bass clarinet replacement screws I have are for the bigger screws on the current model, which don't have the plastic sleeve (both replacements and original don't).
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Author: Caroline Smale
Date: 2011-12-01 19:00
If same situation applies as with the soprano clarinets then I think you will find that the basic screw sizes are the same.
My belief is that by using a thinner head and fitting some friction material around the screw shank they were trying to make the screw sightly adjustable to ease their set-up problems.
The top screw has to be firmly tightened against it's pillar to hold and therefore requires precise adjustment of the cone and recess to fit properly.
The second design allows the screw to be backed off slightly and still hold.
At least that is my theory from observing many Buffets coming into my workshop.
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Author: bill28099
Date: 2011-12-03 03:56
A great teacher gives you answers to questions
you don't even know you should ask.
Post Edited (2011-12-03 13:05)
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