Later, Khan et al. (1987) published their empirical correlation using Saudi Arabian crude oil viscosity measured using rolling ball viscometer at various pressures and temperatures.
The coefficient of dynamic friction was measured using the ball-on-disc method.
Friction and wear behaviors of SS substrates and Ti and TiN coatings were measured using a ball-on-disk type tribometer under sliding against Si3N4 counterparts under boundary lubricated conditions with either normal saline or SBF.
In this communication, the most frequently used oil viscosity correlations are evaluated using a large databank of Iranian oil reservoirs which were measured using a Rolling Ball viscometer (Ruska, series 1602).
Viscosity was measured using a Gilmont falling ball type viscometer (Gilmont Instruments, Barington, IL) with a steel or glass ball.
In applying the ART criteria, deficiencies at the restoration margin were measured, using the 0.5-mm ball-ended CPI probe (Ash/Dentsply, Addlestone, UK).
Film hardness and elastic modulus as measured using nanoindentation on the coated balls met expectations for chromium nitride, and tribological testing of the coated balls in angular contact ball bearings under moderate contact stress levels demonstrated adequate film adhesion for practical use of these coatings in bearing applications.
The adhesion and mechanical and tribological properties of the films were measured using HRC tests, nanoindentation and ball on disk wear tests.
The rheological properties of high-concentration FFs, prepared using a high-energy ball mill were measured using a rotating rheometer.
The profile of the ball taper was measured using a coordinate measuring machine (Legex 322; Mitotoyo, Aurora, IL).
The measurements obtained in the present study may be compared to a recent study [ 7], wherein the eyes of ball pythons were measured using Optical Coherence Tomography (OCT).
