A cautious hello to the forum :) Im seeking a tool for selecting materials for a given application. Im a mechanical eng. student so my real world experience is limited. For example: Shaft D=3mm l=500mm torque applied = 0.25Nm Must be weather-resistant Given this information, how do I narrow my search down from a wide selection? There are several plastics and metals that fit the bill, but how and where do I begin my search? Thanks in advance, Claws.