What is ABEC-5?
Annular Bearing Engineering Committee (ABEC).
There are seven classes from largest to smallest tolerances: 1, 3, 5, 7, 9, 11 and 13. The higher ABEC classes provide better precision, efficiency, and the possibility of greater speed capabilities, but do not necessarily allow the components to spin faster.
High rated bearings are intended for precision applications like aircraft instruments or surgical equipment. Lower grades are intended for the vast majority of applications such as vehicles, mechanical hobbies, skates, skateboards, fishing reels and industrial machinery. High ABEC rated bearings allow optimal performance of critical applications requiring very high RPM and smooth operation.
Bearing code : Please refer the existing bearing code written on the rubber seal e.g. 6800-RS
ID = Inner diameter
OD = Outer diameter
Width = Thickness of the bearing