01-08-2021, 09:15 PM
That is how dots appear on my hoard of ancient inherited used bearings.
The NSK book uses Class and CLASS; these seem to have different meanings and apply to differet maker and national standards. NSK bearings are C2, C3 etc but normal CN, between the two for internal clearance, is apparently not normally marked.
Running clearances entirely OK in other applications have an audible influence on Sevens. I dunno what the experts regard as tolerable for a used bearing
The NSK book uses Class and CLASS; these seem to have different meanings and apply to differet maker and national standards. NSK bearings are C2, C3 etc but normal CN, between the two for internal clearance, is apparently not normally marked.
Running clearances entirely OK in other applications have an audible influence on Sevens. I dunno what the experts regard as tolerable for a used bearing