An experimental investigation was performed to determine the operating characteristics of arched outer-race bearings and to compare the data with those for a similar, but conventional, deep-groove ball bearing. The bearings were tested over a range of shaft speeds up to 28 000 rpm at a thrust load of 2200 newtons (500 lb). Also, one bearing was operated at 26 000 rpm with a range of thrust loads. The amounts of arching were 0.13, 0.25, and 0.51 millimeter (0.005, 0.010, and 0.020 in.). All bearings operated satisfactorily. However, the arched bearing outer-race temperatures and torques were consistently higher than those for the conventional bearing.
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