PIN ON DISC Wear Testing Machine, Friction and wear (typically wear rates and wear resistance) characterization of materials is typically performed using various types of tribometers, while pin on disk test is probably one of the most common. The popularity of the method is due to its relative simplicity and abundance of tribological contacts that can be well described by the simple pin-on-disk motion: from dry contacts of bolt screws to rail wheels to rail contact and to lubricated contact of biological implants