Cennamo Woodwinds
  • Home
  • About
  • Services
  • Rates
  • Reviews
  • Gallery
  • For Sale
  • Blog
  • Contact Us
  • Pad Work
  • 1933 Selmer Super
  • '55 SML Rev D Tenor
  • SML Five Star
  • 1940 Conn 30M Connqueror
  • '46 Gold Plated King Super 20
  • '37 Martin Committee I Tenor
  • Repads
  • Overhauls
  • Full Mechanical Rebuilds
  • Gold 30M Al Epstein Horn Loved Hard
  • 1935 Conn 10M For Sale

December 07th, 2018

7/12/2018

0 Comments

 
Fabrication of a Post Bushing
This 1933 Conn Transitional tenor had a lower stack assembly that was so worn out and loose, the concentric play and the lateral play was egregious. In this article you are reading, we are concerned specifically with the concentric play.
No amount of normal post-swedging would have satisfactorily remedied the poor fit or the subsequent poor action. No amount of detail in the pad work would have remedied the poor action because when the pad closes on it's tone hole, the fulcrum will still rock in its loose-as-can-be orientation, creating a leak in the back of the pad. So, even a meticulously installed pad would suffer from the poor action inside both the hinge tube and the post.

So, first a new rod needed to be made to fit the hinge tubes, but the top most post was worn out still more than all the others. Why was that?

Look at the the third photo, see the old rod? See its splayed head? That is how the slop inside the post has been "corrected" for years. Splay the head and the rod will fit tighter inside the post...until it doesn't because the inside diameter of the post becomes too large for even the splayed head, and now it rocks around in there like crazy.
The solution is revealed in these photos: you make a post bushing of just the right size. In this case, the I.D. of the
bushing is .1085" and the O.D of the new rod is .108" So that gives a clearance of .0005" that's half a thousandth of an inch. Not good if you're working for NASA, but very good if you restore saxophones.
0 Comments



Leave a Reply.

    Archives

    January 2019
    December 2018
    November 2018
    August 2018
    June 2018
    May 2018
    April 2018
    February 2018
    December 2017
    September 2017
    June 2017
    May 2017
    March 2017
    February 2017
    December 2016
    November 2016
    October 2016
    September 2016
    August 2016
    July 2016
    June 2016
    May 2016
    March 2016
    February 2016
    November 2015
    September 2015
    August 2015
    May 2015
    April 2015
    March 2015
    February 2012

    Author

    Carlo Cennamo

    Categories

    All

Powered by Create your own unique website with customizable templates.