Fluid-dynamic bearing system for rotary mounting of spindle motor, has bearings characterized by grooves, where amount of material applied at contact areas corresponds to evaluated material range, and areas are surface treated

摘要

The system has a fixed bearing component (12) and a movable bearing component (14) separated from each other by a bearing gap filled with bearing fluid. Radial bearings (24, 26) are characterized by radial bearing grooves (25, 27) and axially arranged at a distance from each other. External ends of the radial bearing grooves are turned away from each other. A material is applied at annular contact areas (38, 40), where amount of materials corresponds to evaluated material range during qualification test of a fluid-dynamic bearing, and the annular contact areas are surface treated. Independent claims are also included for the following: (1) a spindle motor comprising a fluid-dynamic bearing (2) a method for improving wear characteristics of a fluid-dynamic bearing.