Abstract: Respective constituent members of a wheel bearing unit 5 are assembled and also a cover 74 is fixed to an inner end portion of an outer ring 6. The wheel bearing unit 5 is fitted to a turning machine 38 in a state that a space in which an encoder 72 is provided is sealed tightly from an outside by fitting a stop plug 96 into an insertion hole 84 provided in the cover 74. A top end portion of a rotating shaft 40 of a turning machine 38 is engaged with an engaged concave portion 102 provided to a hub 8a. A turning process is applied to an outer side surface of a rotary flange 13 while turning the hub 8a around the outer ring 6 by the rotating shaft 40, and thus the outer side surface is processed in predetermined shape and dimension.

Abstract: Respective constituent members of a wheel bearing unit 5 are assembled and also a cover 74 is fixed to an inner end portion of an outer ring 6. The wheel bearing unit 5 is fitted to a turning machine 38 in a state that a space in which an encoder 72 is provided is sealed tightly from an outside by fitting a stop plug 96 into an insertion hole 84 provided in the cover 74. A top end portion of a rotating shaft 40 of a turning machine 38 is engaged with an engaged concave portion 102 provided to a hub 8a. A turning process is applied to an outer side surface of a rotary flange 13 while turning the hub 8a around the outer ring 6 by the rotating shaft 40, and thus the outer side surface is processed in predetermined shape and dimension.

Abstract: A rolling bearing unit with a rotational speed sensor comprising a stationary outer ring having a first raceway, a rotatable inner ring having a second raceway, a plurality of rolling elements rotatably provided between the first and second raceways, a sensor support case having a step portion for axial positioning, a detecting portion and a sensor mounted therein, an encoder having circumferentially changing magnetic characteristics and connected to the rotatable ring, a cover made of a synthetic resin, connected to the stationary ring, and having a fitting portion with respect to the outer ring, the fitting portion formed with a groove for mounting a seal ring therein, a mount hole for inserting part of the sensor support case therein, and a portion abutted to the step portion of the sensor support case for axial positioning, and an elastic member having a first portion engaged with the cover and a second portion engaged with the sensor support case to fix the sensor support case to the cover.

Abstract: A rolling bearing unit has a hub which is formed with a housing for partly forming a constant velocity joint, wherein a connecting tube 20 of a magnetic metal plate is provided to have a base half portion 21 fitted onto the opening portion of the housing and a tip half portion 22 projecting from the housing, and a number of through holes 26 are formed in an axial portion of the base half portion and arranged circumferentially to function as a tone wheel.

Abstract: A rolling bearing unit with rotating speed detector comprises a stationary outer ring member, a rotating inner ring assembly, a rolling elements between the outer ring member and inner ring assembly, a sensor mounted to the outer ring member and a tone wheel mounted to the inner ring assembly and having a cylindrical portion faced to the sensor, such that the portion is formed with an outward facing flange to which a jig can be applied.

Abstract: A rolling bearing with seal has a stationary inner race and rotatable outer race, a first sealing ring faced to the external space and mounted to the inner peripheral end portion of the outer race which rotates during use, so that even if foreign matter in the external space such as muddy water adheres to the outside surface of the first sealing ring, it is slung off by the centrifugal force, while a second sealing ring faced to the balls and mounted to the outer peripheral end portion of the inner race, whereby it is possible to nearly completely prevent the muddy water from penetrating into the space where the rolling elements are located.

Abstract: A rolling bearing unit with a rotational speed sensor comprising a stationary outer ring having a first raceway, a rotatable inner ring having a second raceway, a plurality of rolling elements rotatably provided between the first and second raceways, a sensor support case having a step portion for axial positioning, a detecting portion and a sensor mounted therein, an encoder having circumferentially changing magnetic characteristics and connected to the rotatable ring, a cover made of a synthetic resin, connected to the stationary ring, and having a fitting portion with respect to the outer ring, the fitting portion formed with a groove for mounting an seal-ring therein, a mount hole for inserting part of the sensor support case therein, and a portion abutted to the step portion of the sensor support case for axial positioning, and an elastic member having a first portion engaged with the cover and a second portion engaged with the sensor support case to fix the sensor support case to the cover.

Abstract: A rolling bearing unit has a hub which is formed with a housing for partly forming a constant velocity joint, wherein a connecting tube 20 of a magnetic metal plate is provided to have a base half portion 21 fitted onto the opening portion of the housing and a tip half portion 22 projecting from the housing, and a number of through holes 26 are formed in an axial portion of the base half portion and arranged circumferentially to function as a tone wheel.

Abstract: A double-row, angular-type ball bearing for a wheel has a groove radius relationship such that the groove radius r6a of the outer-ring raceway 6a on the widthwise outer side with reference to the vehicle is larger than the groove radius r6b of the outer-ring raceway 6b on the widthwise inner side with reference to the vehicle (r6a>r6b), and has a shoulder section formed in the first outer-ring raceway 6a on the outer side and the second outer-ring raceway 6b on the inner side to have a sub-section 10 that curves in the opposite direction with reference to the main section 9 of the outer-ring raceways 6a, 6b.

Abstract: A cap for a hub unit having a projecting wall so that when the cap is attached to a hub unit for an axle is of an automobile, the projecting wall prevents grease in the rotary portion of the hub unit from moving to the inside of the cap.

Abstract: A seal assembly for sealing a chamber formed between the radially inner and outer coaxial members spaced apart radially from each other and rotatable relative to each other comprises a first radial member extended radially inwardly from the outer member toward the outer periphery of the inner member, a second radial member disposed axially outside from the first radial member and extended radially outwardly from the inner member toward the outer member so that the first and second radial members may oppose to each other, a first seal means disposed between the tip end of the first radial member and the inner member, a second seal means disposed between a side surface of the first radial member and the second radial member, and a third seal means disposed between the outer member and the second radial member, the first, second and third seal means being so formed that leak of lubricant contained in the chamber may be permitted, while flow of foreign material from exterior may be prevented.