Manufacturing method for a bearing device for a wheel

A manufacturing method for a bearing device for a wheel, the bearing device comprising:

• a bearing;
• and
• an outer joint member having a shaft section, wherein
• the bearing comprises an outer member having double-row outer raceway surfaces, an inner member having double-row inner raceway surfaces, and rolling elements in double rows interposed between the double-row outer raceway surfaces of the outer member and the double-row inner raceway surfaces of the inner member,
• the inner member has a hub wheel having a hole and a flange for attachment to a wheel,
• the shaft section of the outer joint member is inserted in a fitting manner into the hole of the hub wheel and is coupled to the hub wheel,
• the manufacturing method comprising steps of:
• providing a projection with an outer diameter surface of the shaft section of the outer joint member, the projection being extended axially;
• providing a small recess with an inner diameter surface of the hub wheel;
• and
• forming a recess in the hole of the hub wheel by cutting the small recess by the projection press-fitted into the small recess along an axial direction, to thereby form a recess-projection fitting structure in which the projection and the recess are held in close contact with each other over an entire region of fitting contact regions therebetween.