XM 046?

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neilob
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Re: XM 046?

Postby neilob » 24 Oct 2010, 5:06pm

Thirdcrank, you are right!! It was pure fantasy although it sounded plausible........it was just a tease knowing Mick's strong devotion to Campag. I have no insight or opinion on the quality issues of Campag BBs.
Using a car to take an adult on a three mile journey is the same as using an atomic bomb to kill a canary.

PBA
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Re: XM 046?

Postby PBA » 24 Oct 2010, 6:38pm

Duplicate post deleted.
Last edited by PBA on 24 Oct 2010, 7:40pm, edited 1 time in total.

PBA
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Re: XM 046?

Postby PBA » 24 Oct 2010, 6:38pm

thirdcrank wrote:I googled XM046...


I don't have the reference material to hand but XM is, I believe, a grade of stainless steel (probably AISI - American Iron and Steel Institute or ANSI - (I think) American National Standards Institute). If that is correct, the 046 is probably a breaking or yield stength of 46 psi. If this is right, it's not especially strong, but probably up there with CroMo...

There are thousands of steel grades. Campag, Shimano and pretty much every other manufacturer of bike stuff are tiny consumers in terms of metals. If it is indeed a steel grade, then it's been stamped there to differentiate it from another similar product. That would mean that either Campag make different grades of axles, or they are bought in.

I suspect the latter. It does make we wonder what other grades are made...

thirdcrank
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Re: XM 046?

Postby thirdcrank » 24 Oct 2010, 7:36pm

neilob

they do say, many a true word spoken in jest.

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Mick F
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Re: XM 046?

Postby Mick F » 25 Oct 2010, 7:04am

Hi guys,
Here on line again in Malta.

I don't see why Campag would put a steel grade in etched writing on the corner of a BB. In fact I don't see why anyone would do that just to tell you the grade. They know the grade, that's enough.

More thunderstorms last night, sunny and bright this morning!
Mick F. Cornwall

goatwarden
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Re: XM 046?

Postby goatwarden » 25 Oct 2010, 10:47am

The number appears to have been spark-etched onto the finished shaft, so intended for later identification rather than in-process. It is etched in the position where many manufacturers stamp the spindle length. Not wishing to suggest pedancy on the part of that great Italian manufacturer, but could it be a code for "111 mm"? Personally I would be inclined just to stamp "111" as I'm not sure it is terribly important or helpful to put the fundamental information required to identify the product in code.

PBA
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Re: XM 046?

Postby PBA » 25 Oct 2010, 1:12pm

Ok, I'm back in the office so I've checked. XM is a designation for stainless steel but I have only located XM-12, XM-13, XM-16 and XM-25.

For XM 046 to be part of this series now seems unlikely.

However - I dn't agree with you Mick. If the company making the axles uses different steels for similar products, they do need to make sure that there is some differential for identification...

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Mick F
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Re: XM 046?

Postby Mick F » 26 Oct 2010, 7:38am

Yep. Maybe.
Perhaps Campag don't make the spindles themselves. The etching has to put on after manufacture of the spindle, so it must be a manufacturing number, not a steel number.

Mine is a Chorus Triple - identical to the Record Triple except for the logos on the bits and bobs. It's the top quality end on their range.
Mick F. Cornwall

stoobs
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Re: XM 046?

Postby stoobs » 26 Oct 2010, 7:41am

It wouldn't surprise me if it were a part number. Sometimes with some manufacturers, the internal part number is not the same as the customer part number. Does anyone else on this forum have a campag spindle that they'd be willing to check for similarly placed numbers?

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Phatman
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Re: XM 046?

Postby Phatman » 26 Oct 2010, 5:57pm

I've got an old Record 111mm with F3881 on it and a not so old Record 111mm that has XV 235 in the same place. I also have a Veloce 111mm with black axle and no markings!