The Hitachi Seiki VT-500 is a 5-axis CNC vertical machining center featuring a Seicos Sigma 16M control system designed for precision multi-axis machining operations. The machine delivers 20 horsepower through its spindle motor, achieving a maximum rotational speed of 20,000 RPM with a CAT-40 taper interface. The working envelope provides 19.69 inches of X-axis travel and 15.75 inches of Z-axis travel, with a circular table diameter of 19.69 inches capable of accommodating moderate workpieces. The 20-station automatic tool changer (ATC) enables rapid tool changes, supporting up to 20 different cutting tools for varied machining applications. The machine's compact footprint and tilting capability make it suitable for complex part geometries requiring simultaneous multi-axis positioning. The spindle's 20,000 RPM capability facilitates high-speed finishing operations on aluminum, plastics, and composites, while the 20 HP motor provides adequate torque for general-purpose milling, drilling, and contouring tasks. This 2002-era model represents mid-range capability in the VMC category, offering balanced performance between rapid tool changes and consistent spindle power delivery. The CNC control system provides programmable axis coordination essential for contoured surfaces and precision tolerances typical of aerospace, medical device, and industrial component manufacturing. Operational considerations include integrated flood coolant systems and the machine's requirement for proper spindle motor maintenance to ensure optimal performance and tool life during extended production runs.