Date: Wed, 31 Oct 2007 08:23:34 -0700 (PDT) From: Jerome & Elizabeth Moos <jerrymoos@sbcglobal.net> To: classicrendezvous@bikelist.org Subject: [CR]BB Questions Message-ID: <622181.71416.qm@web82215.mail.mud.yahoo.com> In-Reply-To: <670224.30438.qm@web30604.mail.mud.yahoo.com> Content-Type: text/plain; charset=iso-8859-1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: list Message: 2
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>
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?
harvey sachs
mcLean va.