Re: [CR]cottered crank spindle diameters.

(Example: Framebuilding:Brazing Technique)

Date: Wed, 31 Oct 2007 20:13:36 -0500
To: classicrendezvous@bikelist.org
From: "Mark Stonich" <mark@bikesmithdesign.com>
Subject: Re: [CR]cottered crank spindle diameters.
In-Reply-To: <472922E3.20009@verizon.net>
References: <472922E3.20009@verizon.net>



>Jerry Moos asked:
><snip> Can one mix different brands/nationalities of cottered
>crankarms with BB's or should one match cranks to the same brand BB,
>or at least the same nationality? I know different nations use
>different cotter pin sizes, but ...<snip>

Harvey Sachs replied
>My Sutherland 4th Ed doesn't treat this, but my memory from earlier
>editions is that there are national specification differences, but
>they are just a few thousandths of an inch. Just enough that I've
>been able to get away with a slightly undersized spindle, by using a
>well-set cotter pin. But w/o a lathe, the interference fit is a real
>bummer. Unfortunately, I just don't remember the sequence of sizes,
>so I just try one ofthe approximate correct length after aother,
>until something is found that will work. Any one have the real data?

All I've ever come across was 16mm (0.629921") and 5/8" (0.62500")

Mark Stonich;
     BikeSmith Design & Fabrication
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