
thumb|right|Image of fretting on a bearing
thumb|right|Image of fretting on a bearing
Fretting refers to wear and sometimes corrosion damage of loaded surfaces in contact while they encounter small oscillatory movements tangential to the surface. Fretting is caused by adhesion of contact surface asperities, which are subsequently broken again by the small movement. This breaking causes wear debris to be formed.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).