Blind posted because top and bottom are boring...

Higher bearing grades generally mean higher RPM with less heat generated.
It usually has to do with the surface quality of the balls or rollers in the
bearings... And of course the "race" that they run in.

Match the RPM of your machine to the rating of the bearing and you should be
fine. Use a higher rated bearing if you wish for longer life. Going much
beyond a single grade above is probably a waste of $$$. ...You could
actually go to ceramic bearings if you want to simply give money way though.


Regards,
Joe Agro, Jr.
(800) 871-5022
01.908.542.0244
Automatic / Pneumatic Drills: http://www.AutoDrill.com
Multiple Spindle Drills: http://www.Multi-Drill.com

V8013-R