(1) Cracks or notches on any of the inner ring, the outer ring, the rolling elements, and the cage;
(2) There is a break on any one of the ferrule and the rolling element;
(3) Significant jams on the raceway surface, ribs and rolling elements;
(4) The cage is worn significantly or the rivet is significantly slack;
(5) There is rust and injury on the raceway surface and rolling elements;
(6) There are serious indentations and marks on the raceway surface and rolling elements;
(7) There is obvious creep on the inner diameter surface of the inner ring or the outer diameter surface of the outer ring;
(8) The discoloration caused by heat is obvious;
(9) The KOYO bearing sealed with grease has obvious damage to the seal ring or dust cover.
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