Method for manufacturing bearing device for vehicle wheel, and bearing device for vehicle wheel

A manufacturing method of a bearing device for a vehicle wheel, the bearing device for a vehicle wheel including:

• an outer member having a plurality of rows of outer raceway surfaces formed on an inner periphery;
• an inner member on which a plurality of rows of inner raceway surfaces facing the plurality of rows of outer raceway surfaces are formed;
• a plurality of rows of rolling bodies rollably accommodated between both raceway surfaces of the outer member and the inner member;
• and
• a sealing member fitted into an opening portion on an outer side of the outer member and an opening portion on an inner side of the outer member, the manufacturing method comprising:
• a pressure adjusting step of enclosing, in a work chamber, the bearing device for a vehicle wheel to which one of the sealing member on an outer side and the sealing member on an inner side is fitted, the work chamber being provided for adjusting an atmospheric pressure in the chamber, and adjusting a pressure in the work chamber to a predetermined atmospheric pressure according to an environment of a use area of the bearing device for a vehicle wheel;
• and
• a sealing step of fitting the sealing member to an opening portion on a side where the sealing member is not fitted of the outer member in the work chamber in which a pressure has been adjusted.