Archived posting to the Leica Users Group, 2003/07/22

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Subject: Re: Re[2]: [Leica] M6 Titanium or Titanized?
From: Seth Rosner <sethrosner@direcway.com>
Date: Tue, 22 Jul 2003 10:35:42 -0400
References: <r02000000-1030-12377A8EBB4211D7A901003065F48752@[10.0.1.3]> <p06001a00bb4185e9d3e2@[10.0.1.42]> <003b01c34fb4$9bcd0c80$0201000a@basecamp2win> <p05111012bb41f71dff7e@[192.168.123.49]> <003f01c34fde$f574ea80$7d38030a@sroffice> <74481533428.20030722094737@umich.edu>

Kurt, I certainly didn't mean the white metal from which they cast
children's toys!!!! I believe it is a zinc alloy and I am sure that it is
well up to the task of protecting Leicas. I'm not complaining about it; I've
had wonderful service from my Wetzlar M6, my main user body. But i don't
give it the kind of hard use that a working professional does.

I doubt that Leica used the sheet metal you describe as I understand that
the tops for M6's were cast, not stamped. I too never heard the phrase
"titanized" till its current Leica use. If I had seen that word out of our
context, I would have thought it referred to a Titanic-style
disaster!!!!!!!!!

All the best.

Seth            LaK 9


- ----- Original Message ----- 
From: "khmiska" <khmiska@umich.edu>
To: "Seth Rosner" <leica-users@mejac.palo-alto.ca.us>
Sent: Tuesday, July 22, 2003 12:47 PM
Subject: Re[2]: [Leica] M6 Titanium or Titanized?


> Hello Seth,
> "White metal" for the top plate of the Leica M6? I seriously doubt
> that.
>
> Referring to "Materials Handbook", 14th edition, by Brady, Clauser and
> Vaccari, "White metals. Although a great variety of combinations can
> be made with numerous metals to produce white or silvery alloys, the
> name usually refers to the lead-antimony-tin alloys employed for
> machine bearings, packings, and linings; to the low-melting point
> alloys used for toys, ornaments and fusible metal; and to the type
> metals."
>
> Now, there is a material called "white metal sheet." Again, I quote,
> "White metal sheet now much used for making stamped and formed parts
> fior custome jewelry and electronic parts is zinc with up to 1.5%
> copper and up to 0.5% titanium. The titanium with the copper prevents
> coarse-gain formation, raising the recrystallization temperature. The
> alloy weighs 2% less than copper and it plates and solders easily."
>
> It may well be that this is what Leica uses. As to whether titanium
> can be plated out onto this alloy is another question entirely. Just
> because you want to do this, doesn't mean that it is possible.
>
> Also, what is this word "titanized?" I have never seen this in all my
> years as an editor of "Material Engineering."
>
> Regards
>
> Kurt
>
>
> -- 
> Kurt H. Miska
> GERMAN BUSINESS TRANSLATIONS
> Ann Arbor, Michigan
> khmiska@umich.edu
> http://www-personal.umich.edu/~khmiska/
>
> --
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In reply to: Message from Adam Bridge <abridge@mac.com> (Re: [Leica] Further digital exploration)
Message from Allen Graves <ahgraves@prodigy.net> (Re: [Leica] Further digital exploration)
Message from "Jim Laurel" <jplaurel@nwlink.com> (Re: [Leica] Further digital exploration)
Message from Karen Nakamura <mail@gpsy.com> ([Leica] M6 Titanium or Titanized?)
Message from Seth Rosner <sethrosner@direcway.com> (Re: [Leica] M6 Titanium or Titanized?)
Message from khmiska <khmiska@umich.edu> (Re[2]: [Leica] M6 Titanium or Titanized?)