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CNC Spindle Motor 2.2KW 220V Water Cooled Spindle ER20 With 80MM Diameter For CNC Milling Machine 4pcs bearing C7002*2 + C7005*2 Package include: 1pcs 2.2KW spindle motor 2pcs ER20 Collet Feature Spindle Motor Power:2.2KW Size:80mm Voltage:220V Frequency:0-400Hz Speed:0-24000rpm Cooling:Water Cooling Runout off:less than 0.005mm Grease Lubrication Speed Ways: Through the inverter output voltage and adjust the operating frequency can be achieved 0-24000 stepless Power Interface: Optional GX16 waterproof air plug, there are marked 1234,123 were connected to the inverter power supply (U, V, W), 4 connected inverter ground Bearing type: 2×7005C P4 DT & 2×7002C P4 DT Note: When starting-up the spindle, reference frequency and maximum frequency must be set to 400Hz. Then it can be adjusted to a lower frequency slowly.