Problem

A journal bearing has a length of 26 cm, and inner and outer radii of 31.2 mm and 32.0 mm,...

A journal bearing has a length of 26 cm, and inner and outer radii of 31.2 mm and 32.0 mm, respectively. The bearing is initially filled with SAE 10W-30 oil at 20°C, and then when it reaches steady-state operation the temperature is 75°C. Find the torque required both at startup and at steady state to maintain a speed of 750 rpm.

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Solutions For Problems in Chapter 4