A BRUSHLESS SPINDLE MOTOR FOR A GRINDING MACHINE INCLUDING HYDROSTATIC BEARINGS

摘要

A grinding machine provided with a spindle rotating under the influence of a cantilever mounted rare earth permanent magnet motor. Hydrostatic fluid film bearings are provided between the ends of the spindle and a bronze bearing to support spindle in such a manner so as to eliminate wear. A single oil reservoir is used to supply oil to the hydrostatic bearings, as well as to the cooling jacket labyrinth of the motor.