CNCShop Spindle Motor CNC Spindle Motor 2.2kw Water Cooled Spindle Motor ER20 Collet Chuck(2.2KW Water Cooled Spindle Motor) This spindle motor speed:8000-24000 R/min The spindle motor's runout off: less than 0.005mm ER20(4mm,6mm,8mm,12mm,12.7mm) This spindle motor use water cooling Applied to Lathes, Mills,Car Hoists, Pumps & Conveyors, etc