3- We need to analyze a journal bearing that has a shaft diameter of 70.00 mm with a unilateral

tolerance of -0.02 mm. The bushing bore has a diameter of 70.10 mm with a unilateral

tolerance of 0.06 mm. The bushing is 35 mm long and supports a load of 2.5 kN. The

journal speed is 960 rev/min. For the minimum clearance assembly, and for two different

lubricants "SAE 20" and "SAE 40" operating at an average film temperature of 60°C find

(30 points):

a. The minimum film thickness,

b. The power loss,

c. The lubricant flow rate,

d. The lubricant side flow rate,

e. Which of these two lubricants would you choose? Why?