Features WORK PARAMETERS --- CNC spindle motor, with 500W power, 0.01‑0.03mm high accuracy spindle radial runout, 12000RPM idle speed, 600mN.m torsion. CARVING MATERIALS --- Can be used for carving wood, plastic, acrylic, PVC, PCB, carbon fiber, density board, and other materials, with strong practicality. AIR COOLING FAN --- The rear end of the motor is reinforced with cooling fan, which can work safely for a long time, and has high speed and low operating noise. WITH ER11 COLLET --- The 52mm diameter spindle motor is equipped with ER11 collet, can be paired with mount to ensure high carving accuracy, no deformation. WIDE APPLICATION --- This spindle motor is widely used in DIY mini CNC routers, engraving machines, milling machines, etc., which is simple and practical. Specification: Item Type: Spindle Motor Power: 500W Working Voltage: DC48V Idle Speed: 12000RPM Torsion: 600mN.m Motor Diameter: Approx. 52mm / 2in Collet Part Length: Approx. 45mm / 1.8in Chuck Part Diameter: Approx. 16mm / 0.6in Motor Total Length: Approx. 200mm / 7.9in Insulation Resistance: >2MΩ Insulation Dielectric Strength: 400V Spindle Radial Runout: 0.01-0.03 high accuracy Application: Can be used for wood PCB engraving, drilling, etc. Package List:1 x Spindle Motor1 x ER11 Collet1 x Collet Nut Package List 1 x Spindle Motor 1 x ER11 Collet 1 x Collet Nut