Mechanical Engineering

2. The shaft shown below is supported by bearings at each end and rotates 500 rpm. The bearing ID is 20mm, dimension a = 54 mm, D = 40 mm, and radius R = 2 mm. The material is SAE 1137 Cold Drawn Steel (which is the same as machined). Use a material factor; Cm = 1.0, a type of stress factor; Cst = 1.0, a reliability factor CR = .81, and the size factor; Cs = .95reliability of 99%

a. What is the Actual Estimated Endurance Strength (s’n) of the material. b. What is the factor of safety (N) at the dimension a = 53 mm. Include the stress concentration factor. c. What is the factor of satety (N) at the load.