Titanium Printed E-Bike Hub! (...when?)

[SniperGaulois]

After the first titanium printed bike and the first titanium printed horse shoes, when will they print the first titanium ebike hub?

It's a perfect part to print in titanium as it is just the perfect size to fit in a 3D printer.

3D printing companies always want publicity, perhaps we could convince one to make us a free ebike hub of titanium?

Part of the process would be a 3d blueprint of a hub specifically redesigned for titanium with topological optimization using Altair SolidThinking Inspire for example, it would be amazing to see! and the price of an entire hub of aluminium? probably less than 1000 dollars on today's market: it takes less than 24 hours to print four customized shoes for a horse and it costs approximately $600 for all of them. What would it weigh? what advantages for a 3d printed hub, i.e. magnets don't need to be glued as they are fixed in place?

 

[zener]

Absolutely brilliant idea.
hmmm 6kg hub capable to top the chromo 8)

I always read something from backiron which is needed for the magnetic field? Is this a problem when there is titanium instead?

 

[SniperGaulois]

Absolutely brilliant idea.
hmmm 6kg hub capable to top the chromo 8)

I always read something from backiron which is needed for the magnetic field? Is this a problem when there is titanium instead?

Oh thanks!

Yes the axis is made of iron which is needed for the magnetic field, perhaps some other distribution of iron is possible in the hub in combination with a titanium axis that would work better and be lighter? for the hub itself titanium is fine, except that perhaps heat transfer is better in aluminium, it says that raw titanium is 22W/mk and aluminium is 250W/mk. it could be printed to incorporate an aluminium strip on the magnets?

 

[zener]

Absolutely brilliant idea.
hmmm 6kg hub capable to top the chromo 8)

I always read something from backiron which is needed for the magnetic field? Is this a problem when there is titanium instead?

hum thanks!

Yes the axis is made of iron which is needed for the magnetic field, perhaps some other distribution of iron is possible in the hub in combination with a titanium axis that would work better and be lighter? for the hub itself titanium is fine, except that perhaps heat transfer is better in aluminium for the same width of metal, perhaps heat transfer is better in titanium?

Titanium has about only 1/10th heat transfer from aluminium but i would make a airventilation disign...
Maybe its possible to mix iron powder with titanium for the magnetic field ring.

 

[Miles]

I think this is the daftest idea of the week....

 

[SniperGaulois]

Yes it doesnt make much sense because of titanium's thermal conductivity, it would be a very technically advanced project. For science reasons it's very intriguing. just to make the axle from titanium saves half of the weight of the axle, except that you would still need steel at the core to guide the magnetic field, necessarily adding weight again.

<<We use titanium rods as strength members in our magnetic assemblies (large Nd-Fe-B and Sm-Co magnets) and there is no noticeable magnetic attraction. >>

<<Titanium is classified as paramagnetic, but it has a very low K-value. This means that it is weakly attracted to magnetic fields, but when the field is removed, it does not retain any magnetic properties.>>

most of the hub isn't made of aluminium anyway, the copper is most of it. perhaps it would save abit of weight, it would need to be covered in aluminium plate to stop dust, and it could perform at higher temps because no glue on magnets as it would be printed to hold the magnets... the wire sheaths still melt and the copper windings would need lacquer still which is damaged at high temperatures, so, couldnt make a hub that could go up to 150 degrees

 

[SniperGaulois]

So probably to print a titanium hub, would have to make it nonmagnetic. for example a steam powered hub, with a little basket at the front of the bike where you could throw in sticks, same as a furnace on a train, and then the bike would have a trailer at the back with coal. anyone?