1. Shape & Structure Helical/Twisted Design: The surface features smooth, continuous spiral curves designed to guide or compress fluid or gas flow. Material: The metallic shiny finish suggests aluminum alloy or stainless steel, polished after CNC machining. Central Bore: A hole in the center for shaft installation. Mounting Holes: Three threaded holes on the top face for bolts/screws to fix the part onto a machine assembly. Symmetry: The two parts in the image appear to be a pair of rotors, typically used in twin-screw compressors. 2. Applications Screw Compressor Rotor: Commonly used in refrigeration systems, air compressors, HVAC equipment, or heavy industrial machinery. Pump or Vacuum Impeller: To create pressure, suction, or fluid displacement. High-Precision Mechanical Part: Manufactured with very tight tolerances, often requiring advanced 5-axis CNC machining. 3. Technical Characteristics High-Precision CNC Machining: Likely produced using 5-axis CNC machines to achieve the complex spiral surface. Surface Finish: Smooth, polished finish (low Ra value) to minimize friction and improve flow efficiency. Durability & Strength: Made from high-strength metals to resist wear, corrosion, and high temperatures. Dynamic Balancing: Requires balance testing to ensure stability during high-speed rotation and to reduce vibration.