Figure shows a machined pivot pin that is a press-fit into part A and is a slip fit in part B. If F= 100 lb, /= 2 in, and d=

0.5 in, what is the pin's safety factor against fatigue when made of SAE 1020 cold-rolled steel?The loading is fully reversed and a reliability of 90% is desired. There is a bending stress concentration factor Kt = 1.8 at the section where the pin eaves part A on the right-hand side.