Shafting up to 3 inches in diameter is usually made from cold rolled steel, with the common biggest diameter of cold rolled steel being _____.

The largest diameter of cold rolled steel commonly available is 5 inches. Cold rolling is a process that enhances the mechanical properties of steel by deforming it at room temperature, which creates a more uniform and finer grain structure. This process works best for smaller diameters due to the nature of the manufacturing method, and while cold rolled steel can be produced in larger sizes, it is less common and may not provide the same benefits associated with smaller diameters.

In practice, for shafting applications that typically require high precision and tight tolerances, the availability of cold rolled steel in diameters up to 5 inches meets the needs of most engineering designs effectively. Larger diameters often require other manufacturing processes or materials that are better suited for the demands of structural integrity and performance in various applications.