>>2026706There is a difference of opinion on this lol
From: jbrandt@hpl.
hp.com (Jobst Brandt)
Newsgroups: rec.bicycles.tech
Subject: Re: How Bearings are Made
Date: 22 Nov 1999 23:05:20 GMT
Roger (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 bythe 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>
https://yarchive.net/bike/ball_bearings.htmlhttps://yarchive.net/bike/index.html>It is particularly important that all of the balls in a given race come from the same production run. They are made to tolerances of 3 or 4 millionths of an inch. One batch may be oversize, while the next batch may be several millionths undersize. If some of the balls in a race are that much smaller than others, the smaller ones might just as well not be there, because only the larger ones will be taking the load.https://www.sheldonbrown.com/tooltips/hubs.html 