[pianotech] Rubber Grommets !!!!

[Paul McCloud]

Beware of adjusting these old rubber baby buggy bumpers.  If you do manage
to adjust them, you may cause the keystick to bind.  The rubber becomes hard
(duh!), and takes a set of the forks on the keystick.  The forks aren't
going to  be at right angles to the sticker wire.  So, when you turn the
button, the angle will be different and force the keystick to one side,
making new sticking keys where there were none before.  DAMHIK.

                Paul McCloud

                San Diego

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Carl Teplitski
Sent: Wednesday, June 17, 2009 10:32 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] Rubber Grommets !!!!

 

Unbelievable timing.  This AM I was out to tune a little old Kimball , and
encountered 

a similar situation.  Tried to adjust one of the grommets, but thought
better of it as I

could feel that the chances of not breaking up these beauties was slim.  I
did manage 

to move one just enough to make it work ? !  Pointed out the problem to
customer, and

told her I would investigate .  I 'm sure that they would have to be
replaced, also. 

 Would like to know where, or more correctly, " if " they are still
available.  

 

Please advise as to where you were able to get same.

 

Carl  , Winnipeg, Canada.  

----- Original Message ----- 

From: Gerald Groot <mailto:tunerboy3 at comcast.net>  

To: pianotech at ptg.org 

Sent: Tuesday, June 16, 2009 2:44 PM

Subject: Re: [pianotech] Rubber Grommets !!!!

 

Hello all,

 

Just finished the job in my shop.  They are the square nuts.  I used Liquid
Wrench and let it set for a while to help unfreeze them from their rusty
frozen places.  As expected, all of the rubber crumbled even before taking
it out of the piano and the rest while removing them from the stickers.  I
managed to get all of the nuts off OK using the regulating tool for these
things on a drill clamping the sticker wires with a vice grip to hold them
firmly in place.  ZIIIIP off they came.    Put the new ones one the same
way.  

 

Fortunately, I had no problems with the new nuts fitting properly.  I've
replaced a boat load of these over the years and so far, knock on wood, have
not encounted any screwy sizes as mentioned in another post.  I also used
some Protek MLP on the threads to assist the new ones so they wouldn't bind
while being turned on.  

 

The most difficult part of this whole job was removing all of the rust.  I
wound up using my dremmel with a wire brush on the prongs in the keys.
Then, I put the round brass thing that we use to clean the barrel of a gun
in my drill and gently cleaned out the inside of the U in the prongs.  Then,
I used 4-0 steel wool on the threads on the stickers going around them.  The
fingers get sore after a while though!   

 

Boy, everything is cheap today too.  5 out of the set of brand new grommets
had the nuts half way out or sideways in them.  Luckily, they send extra's.


 

Thanks for the advice. You might say, this job is NUTS!  

 

Jer

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of JWyatt1492 at aol.com
Sent: Tuesday, June 16, 2009 10:33 AM
To: pianotech at ptg.org
Subject: [pianotech] Rubber Grommets !!!!

 

Hello Gerald,

 

 

   Kimball used two types of rubber grommets.

you did not say which. 

   One was by Pratt - Read with a  square top 

and the other was built by Wood-- Brooks with 

the  round or "dough-nut " grommets.  

 

   While It is necessary to remove the metal screws 

on  the P--- Read to replace the grommets it is not  

necessary to remove the metal screws on the Wood 

---Brooks.

 

 

Regards to All !!

Jack Wyatt

Dallas,

 


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