Found some interesting info on 608 bearings.
I've seen those rpm #'s before so I think that's standard for the 608 size. Ceramic might do higher max rpm, idk.
Load is in newtons. For kg divide by 10, 9.8, or 9.81..
I need to read up on the different load ratings but factoring in 8 bearings, 2691 kg and 1117 kg
http://catalog.ezo-usa.com/item/metric-series-bearings/open-metric-ball-bearings/608There's a typo here. It's not 1000^2 for oiled bearings. That'd be 39 million.
39,000 rpm for oiled
33,000 rpm for greased. And I think that's with a minimal amount of grease, check the pdf below.
Try crunching the numbers for those rpm's and a skate wheel. I think it's crazy fast.
http://catalog.ezo-usa.com/Asset/Lubrication.pdfTemp ranges, loads, viscosity..
dn is bore x rpm? And not max rpm? The rpm in use seems right. Thoughts?
Bore is 8mm
Viscosity. ISO # = cst @ 40*C. Cst is centistokes, and = mm^2/s
ISO 10, 15, 22..
I'm seeing mega ramp speeds online saying 40mph or 55mph. Anyone got info on that?
73-75ft roll-in if someone wants to do that math.
Any ideas for average street skating speeds? Probably putt-putt in comparison.
How about a big, long gap? Wallenberg, Love, UC Davis?
Hillbombing speeds might be interesting but gravity.. I'm more thinking pushing for street skating.
Which brings me to acceleration. No one talks about how easily a bearing accelerates except for maybe inline racers. Seems like it would apply to street skating, pushing.
And I don't think we're getting anywhere near the max rpm (speed) of the bearings. Maybe why some inline stuff use thin gels/greases?
Also found another source thin oil, aviation oils. There's a super thin Aeroshell oil for gimbles and a bunch for turbines.
https://www.aircraftspruce.com/catalog/pdf/aeroshell.pdf