Known: The arm for a Geneva indexing mechanism supports a rolling cylindrical hardened steel pin that fits into the Geneva wheel slots. The pin is to have the same length

and diameter. The material properties of the wheel are known. A design contact stress and design overload torque are given. Find: Determine the smallest acceptable pin diameter. 1. The surfaces of the bodies are frictionless. 2. The bodies are isotropic and homogeneous. 3. The surfaces are smooth and continuous. 4. The radii of curvature R1 and R2 are large compared to the dimensions of the contact area. 5. The compressive yield strength of the weaker material in not exceeded.