On Mon, 29 Oct 2007 01:02:04 GMT,
(Tom) wrote:


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.

I wondered about that. Seems like the precision bearings in my
toolpost grinder, probably ABEC-7, are rather stiff.

Speed and load will be low in an anenomometer, so precision really
isn't necessary. I'll probably use small motor bearings or router
guide bearings.