Quote:
Originally Posted by Logic
 Yes you would still need oil.
"impart force":
Like magnetic poles repel and, according to the maths, the force with which they repel is squared as the distance between them decreases:
So Force = Magnetic Constant /Distance squared.
So the maths says; when D is 0; F is infinite, regardless of how strong the magnet is...
https://socratic.org/questions/the-f...ionality%20%23
ie: You will still get all the force/torque, but without the gears ever physically touching, much like you can't get the like poles of a bar magnet to ever touch... theoretically..? |
Any effect which varies with the inverse square law would achieve the highest magnitude ( unity ) at radius = zero, however, say the Gauss measured at the 'surface' of a dipole magnet would only measure what it measures.
I've got some neodymium rare earth magnets, and I can squeeze like poles together with hand pressure.
Micro-finished hard facing would still require a few thousandths clearance for the gear oil, so, while 'close', would never contact.