Let the film arcs for a series of bearings be 120°, 180°, and 360°. The diameter is 62 mm and the length is 100 mm. Speed = 1200 rpm, r/c ratio is 1000, and film temperature is 77°C. SAE 10 oil is used, and the minimum film thickness is 0.015 mm. Find the load P on the projected journal area that each bearing is carrying. This problem illustrates the fact that the load must be reduced for smaller values of the bearing arc in order to maintain a given film thickness and oil temperature.
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