Insert bearing and manufacturing method thereof, sintered bearing suitable for insert bearing, sintered insert component and manufacturing method thereof, and sintered component suitable for sintered insert component

A manufacturing method of a sintered insert component comprising:

• a sintered component forming step for forming the sintered component having a first end portion and a second end portion by powder molding, said first and second end portions being provided at ends of the sintered bearing in an axial direction;
• and
• an insert forming step for forming a sintered insert component in which an exterior component is integrated with an outer peripheral portion of the sintered component, wherein
• in the sintered component forming step,
• one or more grooves or ridges extending along an axis direction are formed on an outer peripheral portion of a region other than the first end portion of the sintered component, an outer peripheral surface of the first end portion having a tapered surface in which an outer diameter decreases toward a tip end portion of the first end portion, and
• the insert forming step comprises;
• a mold assembling step for holding the first end portion in a fitted state in a recess of an insert mold, bringing an outer peripheral surface of the tapered surface of the first end portion into contact with an inner peripheral surface of the recess of the insert mold along a circumference direction and a tip surface of the second end portion into contact with a surface of the insert mold, and covering the one or more grooves or ridges in the region by the insert mold with intervals so that a cavity is formed on the outer peripheral portion of the sintered component;
• and
• a filling step for filling melted material into the cavity after the mold assembling step so as to be the exterior component.