ISIS BB failures

Would some knowledgable person look at that shorn cross-section of spindle
and comment whether that looks like cast or cold-forged steel?

Thanks,
Tim

"john riley" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

FYI:

http://www.sheldonbrown.com/fsabb.html

At least one other failure was reported on BROL

John Riley

I don't see that particular model of BB listed on their
current web site; but according to a 2002 FSA catalog I
have, their "Ultimax Xtreme" BB had a "Forged hollow
chromoly spindle".

Rick Moll

TimH said:

Would some knowledgable person look at that shorn cross-section of spindle
and comment whether that looks like cast or cold-forged steel?

Thanks,
Tim

"john riley" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

FYI:

http://www.sheldonbrown.com/fsabb.html

At least one other failure was reported on BROL

John Riley

I believe Tim wasn't asking for someone to look at their Web site (d'oh!) . . .

Rick Moll <[email hidden]> wrote in message news:<[email hidden]>...

Quoted message said:

I don't see that particular model of BB listed on their
current web site . . .

Quoted message said:

TimH said:

Would some knowledgable person look at that shorn cross-section of spindle
and comment whether that looks like cast or cold-forged steel?

Quoted message said:

Quoted message said:

Quoted message said:

>>
http://www.sheldonbrown.com/fsabb.html

TimH said:

Would some knowledgable person look at that shorn cross-section of spindle
and comment whether that looks like cast or cold-forged steel?

It is hard (impossible?) to tell from a fracture surface. Microstructure
is usually observed by machining and then polishing a flat surface that
is viewed under a microscope. In addition, if heat treatment is applied
after the casting or forging, the microstructure will be altered so it
might not be possible to tell (and the effects of heat treating will
vary significantly with alloy type).

--
Tom Sherman – Quad City Area