Re: [Hornlist] I can't bear it...

[Bob Osmun]

FWIW, I should point out that ball bearings have been used on the top plate 
of some Holton models from the late 70's, and can be found on the current 
model Finke valves as well. The part of the "bearing" plate that the spindle 
passes through, and the base of the spindle that keeps the endplay in check 
is often referred to as a thrust bearing. I believe that is the term Walter 
Lawson uses to describe that part of the rotor valve assembly.

Jim Becker
Senior Technician
Osmun Music Inc.
----- Original Message ----- 
From: "Jerry Houston" <[EMAIL PROTECTED]>
To: "The Horn List" <horn@music.memphis.edu>
Sent: Friday, May 13, 2005 8:47 AM
Subject: Re: [Hornlist] I can't bear it...


Bill Gross wrote:
Not all bearings are spherical.
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf
Of
[EMAIL PROTECTED]
Sent: Friday, May 13, 2005 1:48 AM
To: horn@music.memphis.edu
Subject: [Hornlist] I can't bear it...
Well I can bear it but it's just something that's bugging me. Why are
the
valve spindles on rotary valves commonly misstated as 'bearings'?
A bearing is a sphere used to lessen friction between two parts,
right?
Isn't the correct term bushing?
True, there are roller bearings, etc.  But there aren't any of those in my 
horns, either.  In fact, I don't believe I've ever seen a horn with a 
bearing of any kind in it, for any purpose.

Bushing IS the correct term.  We just don't see it used much in this 
application.  I gave up long ago, and figured if the folks who do this 
sort of work for a living want to call bushings bearings, it doesn't 
really matter that much to me.

For anyone interested in what bearings really are, though, here's a good 
resource:

   http://science.howstuffworks.com/bearing.htm
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