Nsk Corporation

Masaru Hashida

Tatsuo Wakabayashi

Eishi Shibuya

Yoshio Kaneko

Natsuki Sensui

Nobuhiro Nakazawa

A hub unit bearing Hincludes a rotational speed detectorwhich is made up of an encoderand a sensor. A sealon a side facing a center side of a vehicle includes a primary sealand a secondary sealwhich are disposed in that order in an axial direction from rolling elementson a side facing the center side of the vehicle towards the center side of the vehicle so as to define a primary sealed space portion I between the vehicle's center side facing rolling elementsand the primary sealand a secondary sealed space portion II between the primary sealand the secondary seal, with the rotational speed detectordisposed within the secondary sealed space portion II.

Hub unit bearing

After a hub supporting member is mounted on an end portion of a spindle, correction work is applied to a ring-shaped supporting surface which is an end face of the hub supporting member, whereby perpendicularity of the supporting surface relative to a rotational center axis of the spindle is improved. Thereafter, while the hub main body is made to rotate together with the spindle in such a state that the mounting surface abuts with the supporting surface, grinding finishing work is applied to a cylindrical surface portion (a portion on which inner rings are fitted) of the hub main body. As a result, the perpendicularity of the mounting surface relative to the geometric center axis of the cylindrical surface portion is improved.

Growing community of inventors

Fujisawa, Japan

Masaru Hashida