Hey, these look good for a project I have in mind. Do they have lower
low-speed starting and rolling resistance than lesser bearings? The
project is a little cup-type aenomometer. I got the hemispherical
cups last week.
You may get just the opposite effect. Because the tolerances are held
so closely you may have less internal clearance (unless you specify
more). Best bet is to consider the lubricant and use a minimal amount
of very lightweight oil.