Ball Screw Device And Method For Manufacturing The Same

Abstract: [Problem] To provide a ball screw device with which it is possible to effectively prevent a fitting shaft part of a screw shaft from slipping out of a fitting member in the axial direction even when a moment around an axis perpendicular to a center axis acts on the screw shaft or the fitting member. [Solution] The fitting shaft part has an inner-diameter-side engaging part on which a plurality of external teeth are circumferentially disposed on the outer peripheral surface, the fitting member has an outer-diameter-side engaging part on which a plurality of internal teeth are circumferentially disposed on the inner peripheral surface and which engages with the inner-diameter-side engaging part, the engaging part between the inner-diameter-side engaging part and the outer-diameter-side engaging part has, in a part thereof along an axial direction, a portion having an interference in a radial direction, and the fitting shaft part has, at the end on one side in the axial direction, a crimped part that engages with the fitting member in the axial direction.

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