Four Bearing 1.5KW 1500W 2HP 220V Air Cooling Er11 CNC Spindle Motor Engraving Milling Grind Rpm24000 1.5kw Air-cooled Motor Spindle Four bearing in our spindle motor 1.5kw Air-cooling High Speed High Precision Spindle Air-cooled Er11 Collet Chuck Pass ISO9001 and CE Quality Certification