The water-cooled spindle motor uses water circulation to cool the heat generated after the spindle rotates at a high speed, and the spindle motor uses fan cooling for cooling. Noise: The water-cooled spindle motor is basically no noise. Life: water-cooled spindle motor should pay attention to maintenance, often change water or use industrial water cooler. If you need to use metal, hardwood, granite, stone, you can choose metal mandrel. Metal mandrels are much better than wooden mandrels. Main application: engraving iron, steel, stainless steel, aluminum, hardwood, etc. (this is a high-precision, high-torque professional metal spindle)., Manufacturer: QAXRZCUCD