Which of the following is a common material used in CNC milling?

The common materials used in CNC milling include metals, plastics, wood, and composites. Each of these materials has unique properties that make them suitable for different applications in CNC machining.

Metals, such as aluminum, steel, and titanium, are widely used due to their strength, durability, and ability to achieve precise tolerances. Plastics are also common because they can be easily shaped, are lightweight, and can be produced in various colors. Wood is used for its natural beauty and ease of machining; it allows for fine details and a good finish. Composites combine materials, offering advantages such as reduced weight and enhanced strength, which are valuable in industries like aerospace and automotive.

In contrast, materials like glass, ceramic, and fabric are less commonly used in CNC milling due to their brittleness or the specific machining limitations they may present. Glass and ceramics can be difficult to machine because they tend to shatter, while fabric has properties that make it more suited for cutting or sewing techniques rather than milling processes. Therefore, the diversity and practicality of metals, plastics, wood, and composites as materials make them the most frequently used in CNC milling operations.