If the crank arm is left alone, then it will always be
suspect. I would take the anodize off and polish it to
see if the line goes away. If ok then re-anodize or
keep it polished.
Derek Willburn
Long Beach, CA
> I've seen many instances of similar surface patterns
> that tuned out to be
> creeping trails of corrosion. I'm not sure of the
> mechanism involved, but
> it's not a structural thing beyond the depth that
> such defects might eat
> into the surface.
> In the case of these lines, it seems from the photo
> that these lines are
> fine indeed, and no more damaging to the structure
> than a normal scratch.
>
> Those old Zeus cranks, like any structural parts,
> could fail, but I really
> doubt that failure would originate at such a small
> surface flaw. I don't
> believe the lines resulted from stress or would
> result in much stress
> concentration at all.
>
> David Snyder
> Auburn, CA
> USA
>
>
> ----- Original Message -----
> From: "John Thompson" <JohnThompson@new.rr.com>
> Subject: [CR]Cracks!
>
>
> >I found a couple suspicious-looking meandering
> cracks on one of my Zeus
> > crank arms. These are not like the cracks I've
> seen on failed cranks,
> > and appear to be quite superficial, perhaps only
> involving the anodized
> > layer:
> >
> > http://www.os2.dhs.org/
> > http://www.os2.dhs.org/
> > http://www.os2.dhs.org/
> >
> > Anybody have anything to share on the significance
> of such cracks?
> >
>
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