(1 x4.5KW BT30 ATC Automatic Tool Change Air Cooled Spindle Motor380V ( 24000rpm, 3-phase,800Hz, 4pcs bearing ). 4.5KW ATC Automatic Tool Changer Air Cooled Spindle Motor 380V. 3)The atc spindle uses air cooling to cool the motor and front and rear bearings.
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