Durability is determined by the quality of core components (e.g., PLC, hydraulic valves, and motors). Prioritize machines using world-class brands like Siemens, Schneider, or Rexroth, as these offer global spare parts availability. Ask the supplier for the Mean Time Between Failures (MTBF) data. A professional supplier should provide a comprehensive maintenance schedule and a wear-parts list (such as seals and filters) that are easily replaceable to minimize downtime in high-volume production environments.