White Paper on bearing tolerance and precision levels including definitions and specifications of ABEC and RBEC precision levels . ABEC 5, Class 5, P5.
The ABEC scale is an industry accepted standard for the tolerances of a ball bearing. It was developed by the Annular Bearing Engineering Committee (ABEC)
Regarding bearing accuracy classes, besides ISO normal accuracy, as the . P5. P4. P2. ⎯. ⎯. Ball. ABEC 1. ABEC 3. ABEC 5. ABEC 7. ABEC 9. A60. Bearings.
Tolerance figures for face runout/bore are only given for bearings of P5 and P4 precision grades. All points on one circle of the inner ring bore close to the face
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