[CR] How was Philippe's Adjustable Stem Made?

(Example: Production Builders:Cinelli)

From: Amir Avitzur <avitzur@013.net>
To: Framebuilders <framebuilders@phred.org>
Date: Tue, 20 Apr 2010 18:55:32 +0200
Cc: Classicrendezvous <classicrendezvous@bikelist.org>
Subject: [CR] How was Philippe's Adjustable Stem Made?

I took an old Philippe "MajorTaylor" stem to the plater's recently to remove the old pealing chrome prior to polish & replate.

Under the chrome I was surprised to find that it was made from two rather than three pieces: I expected three pieces: quill, lug and extension with some fillet brazing.

Instead there was only a quill with a "built-in" lug and an extension.

See photo at: http://www.flickr.com/photos/8210984@N06/4537691821/

It looks as if the built-in lug was bulge-formed. But bulge forming dies are expensive ... used only when the quantities justify the expense.

Could there be another explanation?

Amir Avitzur
R"G, Israel