Patent ID: 6502443
Filing Date: 2003-01-07
Classification: B21H,Y10T

Abstract:
A component rolling tool for applying a dynamic pressure groove within a bearing hole of a dynamic pressure bearing comprising:component rolling balls; cylindrical sleeve having an outer surface, an axis, a radius, a center hole, and a plurality of guide holes holding and allowing the component rolling balls to rotate and radially protrude out from the outer surface respectively, and being inserted into the bearing hole, and being relatively translated along the axis with respect to the bearing, and being relatively rotated about the axis with respect to the bearing; a rod-like moving roller coaxially inserted to the center hole of the sleeve, pressing the component rolling balls toward an outward direction of the guide holes and being moved along the axis in accordance with a pressure contact rotation between the component rolling balls and an inner peripheral surface of the bearing hole caused by a relative movement between the sleeve and said dynamic pressure bearing; and a returning apparatus for returning the moving roller to an initial position at a desired timing in a state that the component rolling ball is released from a pressure contact with the inner peripheral surface.