Magnetic Bearing on 3D Printer

[RandoWisLuL]

sharpen the end and watch it spin forever.

[Betto_]

when the bearing said: "doing doing doing" i felt it

[dancollins]

This is a really puzzling video - why is the bearing performance so poor? The contact point looks very blunt, that can't be good. If that's steel on acrylic ('perspex') then the coefficient of friction is 0.4-0.5 which won't be helping. Is there anything else going on? Perhaps the magnets are poorly situated such that there is substantial sideways force which increases the friction force. Apart from (minimal) air resistance, the only other idea I can come up with is that the magnets are too 'soft' meaning that the spinning axle is doing work on re-orienting the magnetic domains each revolution. Does anyone have insights?

[flapajawea]

Super cool! I want to build a magnetic bearing turbine as a proof of concept and stumbled on your video! Looks awesome

[p.]

Every China-Bearing works better than this...

[РенатРахмеев-нт]

Неужели нельзя поставить конусные магниты с двух сторон чтобы избежать упора о стекло ?

[nirodha]

Why can you not keep the end where it needs to be with oposing magnets aswell? Make it frictionless

[devanshgarg]

Others than the blunt end, the lack of heavy mass (for more inertia) compared to the force of drag is causing it to lose energy faster.

[tempstep]

There should be a way to get it to run smoothly and not stop abruptly. Just not sure what it is.

[AutodidactEngineer]

All these modela have one design flaw!!
And that is the point of contact!

[iriantoivan]

I thought it wasn't possible to build some magnetic bearing, I just came over my mind when someone make Tesla turbines and had a problem with the bearing, it couldn't run over 35k RPM. Tesla turbines it self Need over 100k rpm to gain 99% maximum efficiency. Could be this an answer?

[iamwangine]

You gain more friction and loses than a worse bearing available on market 🙂

[Val-eqsg]

That would be nice to use on top of the Z axis theaded rods in the i3 3D printers.

[AndrewAHayes]

Will you be using this for a Z axis leadscrew on a printer?