Fig. 8
From: Generating FAIR research data in experimental tribology

Friction coefficient measurement results of the showcase lubricated pin-on-disk experiment. The range of velocities for this test represent the early stages of hydrodynamic lubrication. The friction coefficient data points and error bars represent the mean and standard deviation, respectively, of the last three out of five consecutive velocity ramps, while the velocity error bars represent the uncertainty of the electrical motor.