BRAKE HYDRAULIC PRESSURE CONTROL APPARATUS AND MANUFACTURING METHOD OF SAME
The purpose of the present invention is to prevent contamination when press-fitting a guide ring for guiding the sliding of a piston. Provided is a brake hydraulic pressure control apparatus (1) comprising: a base body (2) that has a cylinder hole (3); a piston (5) that is fitted to the cylinder hole (3) in a freely slidable manner; and a guide ring (8) that is attached to an opening (9) of the cylinder hole (3) and guides the sliding of the piston (5), wherein the guide ring (8) has: a flange portion (8e) in a lower surface (8b) that opposes the cylinder hole (3), the flange portion (8e) expanding in the radial direction of the guide ring (8); and bulged portions (8c) that are arranged at equally-spaced intervals on the outer peripheral surface (8d) of the guide ring (8) and each of which is bulged outward in the radial direction of the guide ring (8) relative to the flange portion (8e), and when seen in the axial cross section (Ax) of the guide ring (8), each of the bulged portions (8c) has a tapered portion (8f) that expands in the radial direction of the guide ring (8) from the lower surface (8b) toward an upper surface (8a) of the guide ring (8).