No, that was a broken Ti Super Record BB spindle, actually, I believe. The arm was intact. A major heartbreaker.... Probably the beginning of the end of the SR bottom bracket.
Greg Parker
Ann Arbor, Michigan
> Slightly OT timewise but I recall a photo of Laurent Fignon sitting by the
\r?\n> side of the road with a broken left crank arm in his hand.
\r?\n>
\r?\n>
\r?\n> ----- Original Message -----
\r?\n> From:
\r?\n> To:
\r?\n> Sent: Thursday, March 17, 2005 4:46 PM
\r?\n> Subject: Re: [CR] engraved vs. etched campy crankarms
\r?\n>
\r?\n>
\r?\n> > The funny thing is, I've never seen a first-hand report of a Campy R/SR
\r?\n> > arm (of any flavor or vintage) breaking right at the arm-to-spider
\r?\n> > junction. The vast majority of the ones that fail seem to do so at or very
\r?\n> > near the pedal eye (which certainly makes sense from a
\r?\n> > stress-concentration viewpoint).
\r?\n> > My informal CR survey last year turned up precisely zero vintage aluminum
\r?\n> > cranks (of any brand) that broke at the arm-to-spider junction. It
\r?\n> > actually surprised me a bit - I thought there would at least be *some*
\r?\n> > that broke there. Lots of cracks there, but no failures....
\r?\n> > I think the bottom line is: examine your vintage cranks (of any brand)
\r?\n> > around the pedal eyes very closely and frequently for cracks that radiate
\r?\n> > outward from the pedal thread, or for any cracks in that general area.
\r?\n> > These can be fatal. There is virtually always a crack before there is a
\r?\n> > failure.
\r?\n> > The R/SR arms were forged, then machined, BTW, not cast, AFAIK.
\r?\n> > Greg Parker
\r?\n> > Dexter, Michigan, USA
\r?\n> >
\r?\n> > Date: Thu, 17 Mar 2005 08:13:25 -0500
\r?\n> > From: "Daniel Artley"
\r?\n> > To:
\r?\n> > Subject: Re: [CR]engraved vs. etched campy crankarms
\r?\n> >
\r?\n> > I once spoke to a Campagnolo USA rep about the non fluted cranks after
\r?\n> > getting one in the mail to drill and tap for a 74 mm bolt circle triple.
\r?\n> > Of course I wanted the classic fluted one. The rep told me that the
\r?\n> > newer lazer etched cranks when molded, had an electrical charge passed
\r?\n> > through the casting that alligned the molecules along the lines of the
\r?\n> > spider and as a result was actually stronger than the older milled
\r?\n> > cranks. If you check closely, the sharp edged stress riser at the base
\r?\n> > of the arm and spider is not a sharp edge on the lazer etched model
\r?\n> > either. I can't say that this information also relates the the engraved
\r?\n> > cranks.
\r?\n> >
\r?\n> > That crank looks good on my not quite on topic road/path fixed gear, a
\r?\n> > keeper of the flame only in geometry.
\r?\n> >
\r?\n> > Dan Artley
\r?\n> > Parkton, Maryland
\r?\n> >
\r?\n> >>>> Jay Sexton jvs@sonic.net> 03/16/2005 8:19:06 PM >>
\r?\n> >
\r?\n> >
\r?\n> > Is there any truth to the story I have heard that the etched and/or the
\r?\n> > engraved versions of Campy crank arms broke due stress fractures from
\r?\n> > these processes?
\r?\n> >
\r?\n> > What are the locations of the logos on engraved and etched crank arms?
\r?\n> >
\r?\n> > Jay Sexton
\r?\n> > Sebastopol, CA