abnormal wear of two sliding surfaces due to lubrication failure; heavy abrasion may indicate micro-welding and fracture of the high contact points of both surfaces
See rub-off. The disrupted appearance of an ink film as a result of abrasion to either the wet or dry ink film.
Light rub marks or abrasions with no appreciable depth.
age rubbing to the card surface, especially on the embossed highlight;
Roughing up of the running surface in a rolling bearing due to rolling elements sliding instead of rolling.