Excessive friction

[Jon Page]

SInce the tightness reoccurred with the new bushings one can only
question the stability of the shank yoke..

Did an elevation in humidity coincide with the stiffness?

On the last set of Renner USA shanks that were a touch on the slow side,
I sized (50/50) them and most of them became too loose and repinned.
As a course of habit I resized to the new pins and they became loose again.
I'm gambling they will firm back up with the addition of summer humidity.

Jon Page,  Harwich Port,  Cape Cod,  Mass.  mailto:jpage@capecod.net
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At 02:34 PM 5/3/99 -0500, you wrote:
>Dear Colleagues,
>
>We here at the University of Texas at Austin are experiencing a few
>intermittent problems with Renner shanks and flanges. For some unknown
>reason, a dozen or so from each set will literally seize up because of
>excessive friction. When we examine the shanks and flanges in question,
>what we often find is friction so great that the hammershank barely swings
>two times. In one case, I actually rebushed and repinned an entire tenor
>section, only to have the problem return, albeit in a more limited way than
>before. I might add that a drop of Protek on each bushing caused the
>friction to disappear completely and immediately. The question is - where
>is this friction coming from?
>
>This issue is NOT widespread, and is it certainly not my intention to
>criticize Renner USA by rasinig it. On the contrary, I find Renner parts to
>be unusually well designed and machined, which makes this issue even more
>mystifying. I am wondering if anyone else has experienced this problem?
>
>Many thanks.
>
>Tom Seay
>mailto:t.seay@mail.utexas.edu
>