2.2kw Air Cooling Square Spindle Motor + 13 Pcs ER20 Runout-off 0.01mm Four-Bearings for CNC Engraving Milling Grind

Main application:Wood, Aluminum, Stone, metal, glass, PVC industry High speed electric main bearing all adopt theCeramic bearing, axis sets of loading, Improve spindle in the high-speed rotation supporting stiffness and precision grinding. Before driving, rotation of the shaft by hand.Spindle high speed rotation caused by temperature rise, use of cooling liquid circulating system to eliminate. Runout off:Less than0.01mm Collet size:ER20 Bearings:4PC bearing(steel ball bearing)