What is a carbide insert primarily used for in machining?

A carbide insert is primarily used as a cutting tool with multiple edges in machining. These inserts are made from tungsten carbide, a material known for its hardness and wear resistance, which makes them suitable for cutting operations on various materials, including metals. The multiple edges of a carbide insert allow for prolonged use before wear occurs, as each edge can be rotated and utilized as it becomes dull. This increases the efficiency and cost-effectiveness of machining operations because the inserts can be replaced rather than the entire tool.

In contrast, other options describe tools used for different purposes. For example, welding components are used for joining materials together, while grinding tools are specifically designed for finishing surfaces by removing material, and polishing tools are intended for refining surface quality without removing significant amounts of material. Thus, the unique characteristics and design of carbide inserts position them specifically as essential components in machining processes focused on cutting.