220v 2.2kw Air Cooled Er20 Japanese Bearing CNC Spindle Motor and Matching 2.2kw Variable Frequency Drive Inverter 2.2kw Air -cooled Motor Spindle and Matching Inverter Four bearing in our spindle motor 2.2kw Air -cooling High Speed High Precision Spindle Motor Numerical Engraving/grinding/milling Air -cooled Er20 Collet Chuck