was designed so that the axes of rotation of the two cylindrical surfaces of the friction are skew.
 Mobil gear 627 and Four-ball tribotester
paraffinic mineral oils in 0.1 to 2 wt% Lee et.
The tribological properties of sliding wear (reciprocation) for the different samples were evaluated in air on a tribometer equipped with tribotester
software according to the standards: ISO 7148, ASTM G99-95a, ASTM G 133-95, with a relative humidity of 33 to 38%, a temperature of 24 to 27[degrees]C and a non-lubricated state.
, using a ball-on-disk tribotester
, measured a friction coefficient between 0.2 and 0.6 for different nitrogen-implanted AISI 316L grades.
The speed of the roller and the duration of tests can be controlled via a computer attached to the tribotester
The tribological behavior of the oxide graphene nanosheets as water-based lubricant additive was investigated using a UMT-2 ball-plate tribotester
. With the addition of GO nanosheets in pure water, the antiwear ability was improved and the friction coefficient was decreased.