In machining, what is a key characteristic of toolholders?

A key characteristic of toolholders is that they are available in standardized sizes. This standardization is crucial as it allows for compatibility with various machines and tooling. By adhering to specific size standards, manufacturers can ensure that tools can be securely and accurately mounted in different setups, promoting efficiency and consistency in machining operations.

Standardized sizes help machinists quickly find suitable toolholders for their specific needs without custom fabrication, thus reducing downtime and increasing productivity. This characteristic also supports the interchangeability of tools across different machines or setups, simplifying inventory management and tool selection.

In contrast, while some toolholders may be adjustable or made from various materials, not all toolholders possess these qualities. Additionally, toolholders are not universally compatible with all tools, as different sizes and types of tool shanks require specific holders, further emphasizing the importance of standardized sizes in the machining industry.