Plate Bushings - was Re: Bushing vs. bigger pin?

[Richard Brekne]

Grin.. and now I know what Newton was replying to... ah... I suppose I
should read through all my mail before replying to any..

Brian.. the idea is simply that the pin itself is pulled, at to some degree
"bent" towards the hitch pin when under stress. If the first thing it comes
into contact with is (pinblock side) is the pinblock itself, then it will
want to "Pull" the pinblock with it towards the hitch pins (and probably
tend to try and tilt the pinblock a bit I would suppose). If it comes in
contact with a bushing first then it pulls on this point, which is
essentially the plate it self seen from the pins point of view.. that means
the bottom portion of the pin will want to push the pinblock back away from
the plate flange (and I suppose tilt a bit in the oposite direction).

Fine enough.. I am not really sure how important this all is.. grin.. but
the fellows I know over here that advocate pin bushings do so only because
they then dont have to fit the pinblock to the plate flange as exactly as
otherwise... so they say anyways. As for the other arguments for and
against the use of bushings.. they have "balderdash" to say.

Brian Trout wrote:
> 
> I was thinking about this a bit more tonight while doing some tuning.  (One
> thing about tunings, at least the normal ones,... you have time to think
> about stuff...
> 
> It occurred to me that in order for the tuning pin bushing to cause the
> pinblock to be pulled away from the flange, it would have to be free to
> rotate in such a direction to bring that about.  In effect, the forces
> applied by the strings to the tuning pins to the pinblock would need to
> effectively pull the flange side of the pinblock down towards the action in
> order for there to be any rotation whatsoever.  Obviously, with a pinblock
> secured tightly to the plate, this ain't a gonna happen.
> 
> So I have to wonder if blaming the tuning pin bushing for tuning stability
> problems isn't faulty logic to begin with??
> 
> (A picture would be worth a thousand words, but I'm too tired to type that
> long!)   :-)
> 
> KnowwhatImean??
> 
> :-)
> 
> Brian Trout
> Quarryville, PA
> btrout@desupernet.net

-- 
Richard Brekne
I.C.P.T.G.  N.P.T.F.
Associate, PTG
Bergen, Norway