In order to predict heat generation in super precision ball bearings at high speeds the Harris and Houpert frictional models were applied to a high speed range with maximum speed of 150 000 RPM. The measurement of thermal behaviour in super precision ball bearings was observed on a high speed spindle for micromilling. Outer ring bearing temperature and torque was measured simultaneously under stable lubrication conditions set by the oil-air lubrication unit. Measurement was performed via our custom built non-driven spindle on a special test rig. The complex thermo-mechanical model of the spindle unit was used to determine high speed spindle behaviour on super precision high speed ball bearings. Torque models were compared with experimental data and its deviation from real torque was observed. Following our testing this proposal to modify the Houpert torque model was designed.
Science Journal 