Re: [CR] Metric bearings on bikes?

From: "Jon M. Crate" <Jon@FAI.US>
To: <classicrendezvous@bikelist.org>
References: <mailman.18976.1260806292.72377.classicrendezvous@bikelist.org> <8CC4B407EC9246D-5174-22C27@webmail-d067.sysops.aol.com> <4B27D977.10407@aol.com> <8CC4CD8A1B4DE75-2950-10422@webmail-m013.sysops.aol.com>
Date: Wed, 16 Dec 2009 22:55:28 -0500
Organization: FAI Materials Testing Laboratory
Thread-Index: Acp+wYvUUd/XBhliQuaL5cFYgxa6vQACq7Lg
In-Reply-To: <8CC4CD8A1B4DE75-2950-10422@webmail-m013.sysops.aol.com>
Subject: Re: [CR] Metric bearings on bikes?

That's right, passivation is an acid treatment, usually HCl to dissolve away free iron preventing it from corroding. The stable oxide layer left makes stainless steels and alloy steels much more corrosion resistant. Not sure it would make much difference for lubricated bearings

Jon M. Crate FAI Materials Testing Laboratory Marietta, Georgia

-----Original Message----- From: classicrendezvous-bounces@bikelist.org [mailto:classicrendezvous-bounces@bikelist.org] On Behalf Of rdf1249@aol.com Sent: Wednesday, December 16, 2009 9:35 PM To: verktyg@aol.com; classicrendezvous@bikelist.org Subject: Re: [CR] Metric bearings on bikes?

Found metric bearings in Fastenal too. Their prices are pretty good for all bearings and they have grade 25. Some are called passivated. They have a store in my neighborhood and I usually get stuff in a couple days. I just ordered some size 2 brass washers for use on spokes on thin flange hubs. .03 each.

http://www.fastenal.com/web/products.ex?N=999600931+1199926578&Nty=0

I just looked up Passivate: [pas-uh-veyt] Show IPA Use passivated in a Sentence

See web results for passivated

See images of passivated -verb (used with object), -vat.ed, -vat.ing. Metallurgy. to treat (a metal) to render the surface less reactive chemically.

Bob Freeman Elliott Bay Bicycles 2116 Western Ave Seattle, WA 98121 206-441-8144 http://www.elliottbaybicycles.com http://www.davidsonbicycles.com

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