Regarding bearing accuracy classes, besides ISO normal accuracy . P4. P2. ⎯. ⎯. Ball. ABEC 1. ABEC 3. ABEC 5. ABEC 7. ABEC 9. A60. Bearings. (CLASS

WQK cylindrical roller bearing NNU4052 MP4 1.WQK roller bearing 2.roller bearing manufacturer 3.good quality fair price 4.OEM service. Cylindrical roller

P4). NSK supplies the following bearing series with P4Y tolerance: 7000; 7200. Super Precision Angular Contact bearings are specifically designed for rigid,

Determination of Applied Loads and Bearing Analysis . . . . . . . . . . . . . . . 36 .. to ABEC 7 (ISO P4) and ABEC 9 (ISO P2) precision classes. They are available in

White Paper on bearing tolerance and precision levels including definitions and specifications of ABEC and RBEC precision levels . ABEC 7, Class 4, P4.