What is a common material used for making cutting tools?

High-speed steel (HSS) is a favored material for making cutting tools due to its remarkable hardness and ability to retain a sharp edge even at elevated temperatures. HSS can withstand the extreme conditions encountered during machining processes, including high-speed operation and heat generated by friction. Its properties make it suitable for a variety of cutting applications, such as drill bits, end mills, and taps.

In contrast, while copper and aluminum possess beneficial characteristics for certain applications (such as excellent thermal and electrical conductivity in the case of copper), they lack the durability and wear resistance needed for effective cutting tools. Plastic, while useful in non-cutting applications, does not offer the structural integrity or cutting ability required for machining. Therefore, HSS stands out as the ideal material for cutting tools in precision machining.