Gowe&reg;2.2kw Water-cooled/er20/japanese Bearing Spindle Motor and 2.2kw Matching Inverter, Water-cooled Spindle Motor 2.2kw Inverter 2.2KW WATER-COOLING HIGH SPEED HIGH PRECISION SPINDLE MOTOR NUMERICAL ENGRAVING/GRINDING/MILLING Adopt Japanese Imported Bearing:Three times useful time than ordinary spindle motor Technical paramer:1) Spec: 80*200 mm (Diameter:80mm x Length:200mm), 2) Power: 2.2 KW, 3) Voltage: 220V 4) Frequency: 400 Hz, 5) Speed: 8000-24000 R/min, 6) water Cooling, 7)ER20 collet chuck , 8)Runout off: less than 0.005mm, 9) Grease Lubrication Matching Inverter Technical Paramer:1) Inpute Voltage: 220V, 2) Output Voltage  208-240VAC (analogous to Input Voltage), 3) Inpute Frequency: 48-63 Hz, 4) Outpute Frequency: 0-400 Hz, 5) Inpute Phase: 1/3 phase, 6) Outpute Phase: 3 phase