The cutting of advantage high speed that raises cutting of manufacturing efficiency high speed is right the 0 drive theory of the machine tool of cutting of requirement high speed of the machine tool is additional, the main shaft rotate speed of the machining center of SuperMach large high speed that American Cincinnati company produces is 60000r/min; The milling machine of boring of high speed numerical control of Swiss Mikron company, main shaft rotate speed is 42000r/min. The famous electric main shaft on world of system of high speed main shaft produces manufacturer: Switzerland: Fisher company, IBAG company, step-up company Germany: GMN company, FAG company United States: Precise company Italy: Gamfior company, foemat company Japan: NSK company, koyo company Sweden: Bearing of SKF company 1, scroll (80m /s) 2, fluid is static press bearing of in suspension of bearing 3, magnetism (electric main shaft props up ball bearing of pottery and porcelain of contact of 200m /s) horn main shaft of report of bearing scroll bearing CNC Milling