"Tiny Orbo Replication" over 100% efficiency

[wings]

hd motor have stepper that give no smooth movement.

for me VCR.

If the load and weight is not critical try bearing stone
http://www.adamant-kogyo.com/products/precision-components/clock/

a complete system in the old energy meter:

http://www.kanabona.com/kanabona/?q=energy_ceb_energy_meter_1979

or single ball bearing

http://www.acclaimimages.com/_gallery/_pages/0355-0903-0903-1730.html

[PaulLowrance]

there, for instance :
http://www.microblueracing.com/store/index.php?cPath=68_51

Those are their large bearings. What about the tiny ones?

[PaulLowrance]

I wonder what kind of bearings are in these,

http://www.youtube.com/watch?v=gd2QxgJUfkE&feature=related

One thing that helps is most of the weight is on the outer perimeter, and large radius.

[mscoffman]

Those are their large bearings. What about the tiny ones?

Look at these two ceramic hobby bearing links:

Try the RC hobby section: jet turbines; They have some
8x9x27mm, this is small, I believe. These probably are not
optimal for you application but shows what can be done
spec. wise. I've heard that the very best bearings for
skateboarding are of the ceramic type.

http://www.bocabearings.com/main1.aspx?p=docs&id=16&source=adwords

http://www.vxb.com/page/bearings/PROD/8mm/2ISB-1

Enter: "roller skate bearings ceramic" into google. Get some
Teflon based lube too. You are going to have to have your
rotor balanced before any ball bearings can work well. Sleeve
bearings may be a better choice if you have continued high
vibrational loading.

:S:MarkSCoffman

[PaulLowrance]

Another bearing demo,

http://www.youtube.com/watch?v=HzlRp7z-y-w