Originally Posted by
Rogerogeroge
Keep in mind that the grade of the ball bearing should match the grade of the races. If you go with super hard balls, that may cause wear to the races. And replace all bearings, not just singles, and always replace with bearings from the same batch.
Not that I answered the OP's question, but I thought worth mentioning.
You are kidding about the same batch superstition, right?
oger (who?) writes:
> Did you know you should only ever use ball bearings from the same
> batch in one side of a race? They're not exactly the same size
> between batches. Never simply replace that naughty one that bounced
> into the corner of the garage - replace the other 10 (or whatever)
> too!
You are making this up. The tolerance between bearing balls is so
small as to be below a small fraction of the elastic compliance of the
steel bearing. Besides, the races of bicycle bearings are so rough
that a tight bearing feels lumpy. In high precision bearings used on
computer disk storage devices, preload causes a smooth viscous drag.
Even for these bearings the balls are not identical but are made to a
prescribed tolerance. I don't believe I understand what you mean by
the same batch. Each bearing is not made in the same finishing
process as the others in a shipment of balls.
Jobst Brandt <jbrandt@hpl.hp.com>