Patent ID: 7146733

Claim:
A method for producing a dynamic bearing device, wherein the dynamic bearing device comprises a housing, a bearing sleeve fixed to an inner circumference of the housing, an axis member having an axis portion and a flange portion, a thrust member fixed to the housing, a radial bearing portion, arranged between an inner circumferential surface of the bearing sleeve and an outer circumferential surface of the axis portion, for supporting the axis portion in a non-contact manner in the radial direction under a dynamic action of lubrication oil generated in a radial bearing gap, a first thrust bearing portion, arranged between one end face of the bearing sleeve and one end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, and a second thrust bearing portion, arranged between an end face of the thrust member and the other end face of the flange portion opposite thereto, for supporting the flange portion in a non-contact manner in the thrust direction under a dynamic action of lubrication oil generated in a thrust bearing gap, the method comprising the steps of: positioning the bearing sleeve to a predetermined position on the housing; setting the position of the thrust member with respect to the housing with using the one end face of the bearing sleeve as a reference, thereby forming the thrust bearing gap for the first thrust bearing portion and the second thrust bearing portion with a predetermined dimensions, wherein the step of forming the thrust bearing gap with predetermined dimension further comprises the steps of: making the one end face of the flange portion contact with the one end face of the bearing sleeve and also making the end face of the thrust member contact with the other end face of the flange portion; and making the thrust member relatively move in the axial direction with respect to the housing and the bearing sleeve, with an amount that is equivalent to a sum of the thrust bearing naps of the first thrust bearing portion and the second bearing portion; and fixing the thrust member to the housing.