hosted on condor3913
 Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > April 2001 > 2001.04.05 > 08Prev  Next


Repairing Loose Key Pins
By John A. Tuttle

I can identify with Benjamin Haass's problem with regards to installing
new key pins in a unit that had very rusty key pins.  I had a similar
problem when I rebuilt an old Kohler & Campbell 'Tom Thumb' upright
that had been stored in a boiler room for 15 years.  Ouch!

The center rail pins can be glued into place using epoxy.  No problem
there because those pins never need to be rotated.  And having them
securely in place makes bending the pins as required quite easy.

The real problem is the front rail pins.  They must be able to be
rotated so you can adjust the side-play of the key to an optimum
setting.  After running a quick experiment, I found that you can use
epoxy to cement the pins into place, but you have to put mold release
on the pins prior to cementing them in place.  This allows the epoxy
to harden, but still allows the pins to be rotated.

Naturally, if you have the equipment to do so, the best thing to do is
to make a new front rail.  However, the holes for the front rail pins
have to be in exactly the same location as the original pins, and that
would be quite a challenge even for an experienced craftsman: 88 pins,
all within less than 0.001" of where they were originally?

Musically,

John A. Tuttle


(Message sent Thu 5 Apr 2001, 22:45:34 GMT, from time zone GMT-0400.)

Key Words in Subject:  Key, Loose, Pins, Repairing

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2022 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

                                     
Translate This Page