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

End-of-Year Fundraising Drive In Progress. Please visit our home page to see this and other announcements: https://www.mmdigest.com     Thank you. --Jody

MMD > Archives > August 2004 > 2004.08.16 > 06Prev  Next


Make Wurlitzer Valves With "Pem" Fasteners
By Don Teach

Here is how you can make new Wurlitzer-style valves.  Use an automated
punch machine and a "Pem" fastener machine; in fifteen minutes you
are done.

The Pem fastener is the key to making the valves.  In the past,
restorers have had to use screws and then grind off the head of the
screw.  A Pem fastener (McMaster-Carr for one source) can easily be
inserted on a drill press with easy to make tooling.  Many of today's
piano rebuilders or home hobbyist would never run into Pem fasteners.

The firm that made them for me just happened to right size cutters in
their CNC punch machine or it would have never happened.  Once set up,
these machines could make thousands of these valve discs in an hour.
The machine time on this run, to make four hundred of the valve discs,
was less than five minutes.

After they were made the manufacturer said "no more" -- they ran out
of fiber material and I was lucky enough that they just happened to
have the machine set up with the right sizes of dies the day I needed
the machine.  I would have never thought about the Pem fastener, which
works perfectly.

Don Teach - Shreveport Music Co.
Shreveport, Louisiana

 [ Don sent a photo which I will place at the MMD Tech site,
 [ http://mmd.foxtail.com/Tech  -- Robbie


(Message sent Mon 16 Aug 2004, 15:21:54 GMT, from time zone GMT-0500.)

Key Words in Subject:  Fasteners, Make, Pem, Valves, Wurlitzer

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 1995-2024 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

Please Support Publication of the MMD with your Generous Donation

Pay via PayPal

No PayPal account required

                                     
Translate This Page