Caused by rolling elements sliding or skidding due to uneven loading or poor fitting.
Uneven wear of the bearing races due to cycles of sliding or skidding
Wear resulting from small amplitude motion between two surfaces; may produce red or black oxide.
Surface damage caused by very small relative movement between two surfaces usually under heavy load.
Damage or grooving caused by the removal of the protective oxide that is formed on most corrosion resistant metals. It happens when a softer material (rubber) rubs against a hard shaft or sleeve. A common problem with low cost O.E.M. mechanical seals and bearing grease or lip seals.
A type of wear that occurs between tight-fitting surfaces subjected to cyclic relative motion of extremely small amplitude. Usually, fretting is accompanied by corrosion, especially of the very fine wear debris.
Small amplitude oscillatory motion, usually tangential, between two solid surfaces in contact. Fretting corrosion A form of fretting wear in which corrosion plays a significant role.
Wear phenomena taking place between two surfaces having oscillatory relative motion of small amplitude.
Metal deterioration caused by repetitive slip at the interface between two surfaces.
A condition in which mated surfaces move slightly and continually expose fresh metal. The exposed metal oxidizes and builds up until electrical continuity of the system is broken.
Fretting (or fretting corrosion) refers to corrosion damage at the asperities of contact surfaces. This damage is induced under load and in the presence of repeated relative surface motion, as induced for example by vibration. The ASM Handbook on Fatigue and Fracture defines fretting as: "A special wear process that occurs at the contact area between two materials under load and subject to minute relative motion by vibration or some other force."