A 2-in.-diameter × 4-in.-long 120° central partial bearing turns 1350 rpm. SAE 10 oil is u...

A 2-in.-diameter × 4-in.-long 120° central partial bearing turns 1350 rpm. SAE 10 oil is used. Film temperature is 175°F and room temperature is 100°F. Assume housing temperature rises one-half as much as the film temperature, and that the cooling rate is 2 Btu/hr/ft2/°F. Let the area of the housing be 8 times the developed journal area. If the shaft and bearing are dimensioned as shown in Fig. 1, determine the load and minimum film thickness for an assembly at the loosest permissible fit, and also for an assembly at the tightest permissible fit.

Figure 1