A frictionless bearing

In this video is a magnet that is repelling the aluminum circle,make this a frictionless bearing. This a very simple way to make a frictionless bearing that can be use in may different ways.

Category:

Science & Technology

Tags:

• frictionless
• bearing
• magnet
• 100%
• aluminum
• side
• ways
• science
• efficiency
• float
• levitation

[inverse2k1]

I think you ruined your magnet, by the way..

[TheRealDealinlife]

@inverse2k1 Lol,  I think I did but it was cool!

[choomphukaew]

how to check the frictionless

[Crowcaine77]

@czebra in a vacuum or in space, it would be frictionless. Technically speaking though, you are correct, but I think that frictionless in this particular instance, simply means the lack of contact with a solid object.

[czebra]

@TheRealDealinlife Not a problem! What you're doing is a great way to learn about new things because it exposes you to new ideas and if you have some guidance from someone that knows a thing or two (in this case I can help out, but there are other areas where I am not knowledgeable but others are) then you can really understand what's going on.

Keep on learning my friend! It's a wonderful thing!

[TheRealDealinlife]

@czebra Thanks for explaining that!!

[czebra]

@kasmackba Let me add that there IS friction between the spinning surface and air... also known as windage. As I explain in another reply, at this scale it is small enough to be negligible and hence I did not consider it. So yeah you could say there is technically friction.

But eddy current losses are not friction! They are a loss indeed, but not a friction loss.

[czebra]

@TheRealDealinlife Technically, no.

Let me explain: there is friction between the bearing and the air it is moving through. This is usually defined as "windage", but at its core it is still friction (contact between air and bearing surface). For your size bearing though the windage is likely so small as to be negligible (unless you get to REALLY high RPM).

In a vacuum you would have created a frictionless bearing.

Does that help? Hopefully I'm being clear.

[czebra]

@kasmackba That's just blatantly wrong. Physics definition of friction? Read it: "two bodies or substances in contact."

IN CONTACT

Let's define contact, shall we? A quick Google search yields the following: "The state or condition of physical touching."

You sir (or madam) are blatantly wrong. Get your definitions straight.

Your analysis is sound, your definitions are wrong, that's what I was saying.

[kasmackba]

@czebra

Incorrect. Physics definition of friction: "A force that resists the relative motion or tendency to such motion of two bodies or substances in contact."

And that is exactly what eddy current do. My analysis of the "bearing", from a physics point of view, is 100% correct. Not because *I* say so, but because science backed up by empirical evidence prooves it.

Could it be that you're confusing the meaning of the word friction to be limited to physical contact?

No cookie for you.

[TheRealDealinlife]

@czebra Thanks. What if you did not consider the drill and its friction. Can you say that it is a frictionless bearing?

[czebra]

@TheRealDealinlife Just so you know, there is no friction but other loss mechanisms exist. Also, if you're gonna use that drill... the drill itself will have friction within it so while your bearing is frictionless (but remember, not lossless) the system as a whole is not frictionless. kasmackba is kinda correct, but is getting some terms mixed up. (I work in the magnetic bearing industry so you can consider me a sort of expert on this subject)