Klarinet Archive - Posting 000142.txt from 2011/06

From: Rachel Roessel <gsurosey@-----.com>
Subj: Re: [kl] Keeping screws in place
Date: Fri, 17 Jun 2011 11:43:10 -0400

I see what you mean. The screw on my R13 is only threaded about halfway. The
screw in the same place on the Vito I have (my bedroom lamp) is threaded all the
way and is the same diameter throughout the entire length.

Thanks!

Rachel

________________________________
The screws we are talking about have cap heads, which fit into the
countersunk hole on the post. You cannot keep them screwing for ever as the
cap tightens up against the bottom of the countersink. The V hole in the rod
should therefore be reamed so that the screw is free to rotate but not
loose. If the rod is too tight, you should ream a little more out of the
rod. If it is too slack, ream a little more out of the countersink. There
are of course special tools for these, sold by Ferees and others. Your screw
is of this type if, when you screw it into the post with no key present, it
stops at some point and will not go any further. As you say, the mechanism
is built to work around that.

Or should be. But some modern Buffet E13s, and probably other instruments -
have a different system. They have a pivot screw that is threaded all the
way along, essentially a grub screw. If you tighten it, yes it will jam.
This type does need something to lock it. I don't know what Buffet use at
the factory, but on the example I saw, there was a thin thread wrapped
around the screw thread which made it stiff to turn. Loctite (the right
sort) would be better. (I had reamed the pivot several times before I
discovered this!!). This is a cheaper construction which can work reasonably
well but is less reliable.
_______________________________________________
Klarinet mailing list
Klarinet@-----.com
To do darn near anything to your subscription, go to:
http://klarinet-list.serve-music.com