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 Post subject: Titanium - magnetic ?
PostPosted: Fri Oct 01, 2010 6:31 pm 
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Joined: Wed Sep 19, 2007 10:43 pm
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I recently bought a NOS boxed Nervar titanium axled BB in 118mm with sealed bearings, but older style Octagonal end cups.

The whole lot weighs approx. 235g.

The box says on it 'Axe en Titane'

What surprises me, it that a magnet sticks hard (strongly) to the axle - I thought titanium wasn't magnetic ?


Last edited by lastpubrunner on Sat Oct 02, 2010 12:06 am, edited 1 time in total.

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 Post subject:
PostPosted: Fri Oct 01, 2010 6:40 pm 
rider | rBoTM Winner
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Joined: Fri Jan 25, 2008 1:42 pm
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Location: Wakefield, Yorkshire
It isn't - is it??

Not unless there's some ferrous material in there somewhere.

Does it feel lighter than an equivalent steel axle, it should do?


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 Post subject:
PostPosted: Fri Oct 01, 2010 6:40 pm 
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Joined: Mon Feb 15, 2010 6:27 am
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Yes it's paramagnetic.......But doesn't retain it's magnetism like steel....


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PostPosted: Fri Oct 01, 2010 7:08 pm 
retrobike rider
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mavesyn wrote:
Yes it's paramagnetic.......But doesn't retain it's magnetism like steel....


What he says, it's paramagnetic...
BUT for all intents and purposes with respect to sticking a magnet on it etc.. then No it is not.
You would need I assume MRI style equipment and possibly metal detectors (airports) for you to notice.

You would probably find that out by using google on Titanium. Most likely there is a wikipedia or similar on it.
As for the Alloys of it, which you would certainly have then that's different but again for this case then no it is not.


P.S. I would think that if it was Titanium then it would be sub 200g. As BB-UN90 (XTR/DuraAce)from the early 90's and my FSA Ultimax Cro-Mo weigh about 235g


Last edited by FluffyChicken on Sat Oct 02, 2010 7:43 am, edited 1 time in total.

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PostPosted: Sat Oct 02, 2010 12:03 am 
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Joined: Wed Sep 19, 2007 10:43 pm
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Looks as if I've been 'stung'.

Buying a 'titanium' axled BB that turns out to be steel, is an expensive steel-axle BB. :( :( :(

Perhaps it is a titanium colour BB ?


Last edited by lastpubrunner on Sun Oct 03, 2010 11:16 am, edited 1 time in total.

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 Post subject:
PostPosted: Sat Oct 02, 2010 8:40 am 
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I have a Royce titanium BB and it weighs 235grams with cups and bearings. I also have a Zeus titanium and this is 210grams complete. The Zeus has steel rings on the axle where the races go to stop wear. This makes it appear magnetic but it's not. The titanium doesn't seem to be magnetic at all.


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