Patent ID: 6431757
Filing Date: 2002-08-13
Classification: F16C

Abstract:
A hydrodynamic bearing unit comprising:a spindle member composed of a spindle and a flange portion; a radial bearing part for supporting said spindle member in a radial direction without contact by means of a hydrodynamic pressure occurring in a radial bearing clearance between the outer periphery of said spindle and a radial bearing surface opposed thereto; and a thrust bearing part for supporting said spindle member in a thrust direction without contact by means of hydrodynamic pressures occurring in thrust bearing clearances between the end faces of said flange portion and thrust bearing surfaces opposed thereto, wherein a relation between said radial bearing clearance and said thrust bearing clearances are set so that a moment load acting on said spindle member is supported by both of said radial bearing part and said thrust bearing part.