Titanium BB
- Thread starter pubrunner
- Start date
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Gerry Attrick
Lincolnshire Mountain Rescue Consultant
Titanium is regarded as "paramagnetic" and is only very weakly attracted to magnets. If your magnet holds fast, then questions should be asked.
Gerry Attrick
Lincolnshire Mountain Rescue Consultant
One thing, it is unlikely the balls in the bearings are titanium, is your magnet attached to them?
OP
OP
pubrunner
Legendary Member
OP
OP
pubrunner
Legendary Member
The magnet attaches to axle, cups - everything !
snailracer
Über Member
Drop it in a bucket of concentrated hydrochloric acid. If it dissolves, it's not titanium.
Fattman
Active Member
- Location
- Roydon, Essex
Yikes!
Drop it in a jar of water - if it displaces 30cubic cm it's steel, if it displaces 51cubic cm it's titanium. I think that's about right (7.8g/cc steel, 4.5 for Ti.) but always was a bit rubbish at maths.
A quick scoot round the internets suggests Ti often contains iron and so can be a bit more magnetic than expected... And how strong are your magnets? Fridge-magnet or skin-pincher rare earth?
That's right, but if as in this case we know the weight, we can measure the volume by dispacement, calculate the density and so deduce the material due to the different known densities of steel and titanium.
steve52
I'm back! Yippeee
- Location
- bottesford scunthorpe
erm the density will not effect the displacment,only the volume, so even knowing the weight dosent help? how could it ,im often wrong so do explain please then one of us will lern somthing and if its me all to the goodif a bb is always same size then the saving must be in weight due to lighter/stronger materials so making things out of carbon fibre/titanium/aluminum saves weight
thems my assumptions, if OPs bb weighs a lot less than a steel or whatever bb and does the same job then it's a winner I'd have thought?
this isn't the Archimedes gold crown connundrum I suggest
thems my assumptions, if OPs bb weighs a lot less than a steel or whatever bb and does the same job then it's a winner I'd have thought?
this isn't the Archimedes gold crown connundrum I suggest
Fattman
Active Member
- Location
- Roydon, Essex
I was slightly shooting from the hip while dealing with the kids' bath/book/bedtime, so it was with a headache... as Svendo said, you can get its density, which is known for steel & titanium - so you might have a stab at knowing what it actually is made of, and if pubrunner wanted to buy a Ti BB, he wants to get a Ti BB!
Not really a serious proposition anyway as you'll end up with water in it (which might cause trouble if you are trying to argue for recompense) and unless it is solidly one material and there are no air pockets etc. you might consider your findings inconclusive...
So apologies to the OP for going down a not-necessarily-very-helpful route for helping with what might well be a real issue.
dan_bo
How much does it cost to Oldham?
Drag a sharp knife scross it. If it scratches, you've got a pup.
OP
OP
