damper rod noise

[David M. Porritt]

Rick:

 

This is one area of piano work that for the most part has failed in its
evolution more than most.  Even Steinway - as reluctant to change as anyone
- has replaced the bushed hole for damper rods with a better idea.  Even the
wonderful Walter studio pianos have the pedal rods (rough maple dowels)
running through bushed holes that make horrific noises.  If you find a piano
where the positioning of the rods causes a lot of rub you'll be much better
off redesigning the system unless you just love re-lubricating them each
time you see the instrument.  I wish I knew how many damper systems I've
redesigned to get rid of the friction noise caused by that arrangement.  Not
all of those systems rub hard enough to cause noise..it depends on how the
levers are placed, but if you find one that makes a lot of noise, a
frictionless redesign is the best solution.

 

dave

 

____________________

David M. Porritt, RPT

dporritt at smu.edu

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of richard.ucci at att.net
Sent: Saturday, September 08, 2007 8:24 AM
To: pianotech at ptg.org
Subject: damper rod noise

 

OK List,

I've searched the archives, but can't find the thread. Two Asian pianos, K&C
(Samick) and a PR . Both uprights, with same problem. Sustain rod is making
that scratchy noise . What is the lube of choice, does the bracket have to
be removed to apply? Should I rebush with new buckskin? Very troublesome
....

Thanks,

Rick Ucci/Ucci Piano 

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