Hey, if we can assemble a few broken hub/axle assemblies, I have a friend
(who is a flagger)who does failure analysis for Cat. Perhaps we could have
them looked at to see if there is a pattern.
Bob
> Bill Babcock wrote:
>
> >
> >
> > I really doubt that is happening guys--if the bearing housing was
> > flexing that much it would crack the bearing race, and I don't think
> > we've ever seen that.
> >
> > -----Original Message-----
> > From: Jack Brooks [mailto:brooks@belcotech.com]
> > Sent: Wednesday, August 02, 2000 10:54 AM
> > To: Jack W. Drews
> > Cc: Friends of Triumph
> > Subject: RE: TR axle breakage - my theory
> >
> > > Every hub / axle assembly that I've taken apart has exhibited a
> > puzzling
> > > thing. The surface appearance of the axle on the inboard third of
> > the
> > > mating surface has been different than the outer 2/3 or so.
> >
> > Jack,
> >
> > If the problem is caused by flexing and "bell mouthing", as you
> > suspect,
> > the different appearing surface of the axle may hold the answer. Do
> > you
> > (or other FOT) have access to high magnification microscope or a SEM
> > (scanning electron microscope)? I am wondering if the difference in
> > the
> > appearance on the taper might be fretting or some other surface
> > condition
> > which would reveal the mechanism causing difference in appearance and
> > possibly the failure too.
> >
> > Please keep us informed of what other clues you may find. Maybe we
> > can
> > help.
> >
> > Regards,
> >
> > Jack Brooks
> > 1960 TR3A
> > 1974 Norton 850 Commando
> > Hillsdale, NJ
> >
> >
>
> I'm not talking about the bearing housing. It's the HUB. The portion of
> the HUB inboard of the flange where the wheel bolts on. And most of the
> axles are breaking about 1/2" down inside the HUB -- at the end of the
> keyway.
>
> In fact, want to buy my old bearing? I need the money.
>
> Of course, this theory, like the last one, may not be valid.
>
>
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