Patent ID: 7600320
Filing Date: 2009-10-13
Classification: F16C,Y10T

Abstract:
1. A method for manufacturing a hydro dynamic bearing device including a housing, an axial member housed in the housing, a radial bearing part for supporting the axial member in a non-contact manner in a radial direction by a hydro dynamic pressure action of a lubricating oil generated in a radial bearing clearance, and a seating part formed on one end part of the housing, the method comprising the step of measuring an oil-level height of the lubricating oil in the housing by laser displacement determining means that is arranged at a position a predetermined distance away from the sealing part of the housing, detecting a distance from a standard position of the laser displacement determining means to the sealing part and a distance from the standard position of the laser displacement means to the oil-level height, and based on a comparison result between the two detected distances, detecting the oil-level height of the lubricating oil in the housing.