Bearing for a wheel of vehicle

摘要

A vehicle wheel bearing has a sealing device ( 12 ) on an inboard side of the bearing with a first sealing plate ( 23 ) mounted on an inner ring ( 3 ), and a second sealing plate ( 24 ) mounted on an outer member ( 10 ), arranged opposite to the first sealing plate ( 23 ). The first sealing plate ( 23 ) has a radially extending portion arranged on the inboard side of the bearing. An encoder ( 25 ) is bonded on the radially extending portion. The encoder ( 25 ) is made of elastomer material which includes magnetic substance powder. The N and S poles are alternately magnetized along the circumferential direction. The second sealing plate ( 24 ) has a substantially "L"-shaped cross-section formed by a cylindrical portion and a radially extending portion. Integral side-lip(s) slidingly contact the radially extending portion of the first sealing plate ( 23 ). A protecting cover ( 27 ) is mounted on the first sealing plate ( 23 ) so that it intimately contacts with the encoder ( 25 ).