The STEPCRAFT spindle is a technical product with high precision, stability and quiet running. The HF 500 are cylindrical spindles with a compact design and equipped with an asynchronous motor to provide high torque levels. High capacity ball-bearings (3x) bring the concentricity accuracy and a long tool life. A sealing air system prevents the penetration of dust, chips or liquid to the ball-bearings. The service life will be extended clearly. Additional advantages are high stiffness, low-vibration running and long-life grease lubrication.