Pilot Bearing Size Concerns

I STILL remember the old days of car parts. I once worked for a large parts house in town. We were a factory dist. for Timken, Fafnir bearings, and Browning sprockets/ sheaves/ taper lock products and pillow blocks. MOST ocmmon ball bearings are metric

But one "glitch" that CAN REALLY GET YOU is stuff like homeowner table saws and other stuff such as that Let's say you have a table saw and the bearings arbor has a 3/4" shaft which of course is .75, and this is only "off" from the closest metric bearing which is 19mm and is .748 by TWO THOUSANDS two small

So here is what did/ can happen..........The bearing the manf. put in there originally is a metric OD and ID bearing that has had the INNER BORE HONED to fit a 3/4" shaft. AND IT HAS the metric part numbers clearly stamped on the side seals. THE REAL part number is INKED around the outside of the outer race...where it can easily get destroyed "by anything."

So that bearing started out being a common metric 204SS bearing, let's say. But now it's been honed out .002 by the manf to fit the larger shaft. So WHAT does the owner do?

HE TAKES THE CLEARLY MARKED 204 down to the parts store and "we" sell him a nice new 204 METRIC bearing. And HE takes it home AND ATTEMPTS TO BEAT IT ONTO THE 3/4" SHAFT until he ruins the bearing and the shaft!!!!