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ABEC precision levels, ABEC-1, ABEC-3, ABEC-5, ABEC-7, and ABEC-9 are the equivalent to ISO precision levels P0, P6, P5, P4, and P2 respectively.
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WQK cylindrical roller bearing NNU4052 MP4 1.WQK roller bearing 2.roller bearing manufacturer 3.good quality fair price 4.OEM service. Cylindrical roller
White Paper on bearing tolerance and precision levels including definitions and specifications of ABEC and RBEC precision levels . ABEC 7, Class 4, P4.
Regarding bearing accuracy classes, besides ISO normal accuracy . P4. P2. ⎯. ⎯. Ball. ABEC 1. ABEC 3. ABEC 5. ABEC 7. ABEC 9. A60. Bearings. (CLASS
P4). NSK supplies the following bearing series with P4Y tolerance: 7000; 7200. Super Precision Angular Contact bearings are specifically designed for rigid,
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