A universal joint includes a bush, a bearing journal supported in the bush by a bearing and a seal assembly configured to form a seal between the bearing journal and the bush. The seal assembly includes an outer body formed from a first material having a first hardness, and a reinforcing body at least partially embedded in the outer body is formed from a second material having a hardness greater than the hardness of the first material. The reinforcing body contacts and forms a slip surface for a rolling element of the bearing. The reinforcing body and the outer body are configured such that the reinforcing body compresses a portion of the outer body against the journal when the seal assembly is mounted on the bearing journal.

A universal joint contains a first joint yoke and a second joint yoke. The first joint yoke and the second joint yoke are connected by a journal cross, ends of the journal cross being mounted in the joint yokes by bearings. In order to lubricate at least one of the bearings, at least one lubricant feed-through is provided, which is provided outside of a central bore of the journal cross.

A wheel hub assembly for tension spoke wheels is provided. The wheel hub assembly has a construction that automatically adjusts the position of the axle bearings along the rotational axis of the hub assembly to take-up slack between the axle bearings and the hub shell to prevent wheel wobble.

A method of manufacturing a universal joint includes: temporarily assembling a bearing, which supports a shaft portion of a joint spider such that the shaft portion is rotatable, with respect to a through-hole and the shaft portion by press-fitting the bearing to a first position in the through-hole of a yoke; and clinching, after the bearing is temporarily assembled, a portion of the yoke around the through-hole, and pressing the bearing deeper into the through-hole with a clinched portion formed by the clinching to press-fit the bearing to a second position located deeper than the first position in the through-hole.

A protective ring for a sealing arrangement of a bearing bushing of a journal cross assembly. The protective ring has an annular sleeve segment, which is concentric to a longitudinal axis, an annular seat segment which extends radially inward at a rear axial end of the sleeve segment, and at least one protrusion, which protrudes radially inward at a front axial end region of the sleeve segment. The protective ring also has a plurality of webs, which are distributed over the circumference and which protrude axially from the seat segment and are arranged inside the sleeve segment.

A universal joint bearing with at least a first and a second elastomeric ring. The universal joint bearing is free from spiral springs, which exert a force on a portion of one of the elastomeric rings. The portion is provided for abutting against a trunnion of a crosspiece of a universal joint in a condition in which the universal joint bearing is part of the universal joint.

An outer ring 6a for a shell-type radial needle bearing having a cylindrical shape with a bottom is achieved for which fatigue life of the bottom plate section 9a and the continuous section between the bottom plate section 9a and the cylindrical section 8a is improved, as well as the anti-corrosion characteristic of the outer ring 6a is improved and the outer ring 6a can be prevented from coming out of the bearing without an increase in cost. After obtaining an intermediate raw material 35 having a cylindrical section and a bottom plate section from a metal raw material, shot peening is performed on the intermediate material 35 to create residual compressive stress in the surface and surface layer section on the outer surface side of the cylindrical section 8a and the bottom plate section 9a such that the residual compressive stress in the surface layer section on the outer surface side is greater than the in the surface layer section on the inner surface side, and from the surface to a depth of 0.03 mm is 700 MPa to 1600 MPa.

In order to attach cup bearings 18 with good precision in portions between circular holes 15 that are formed in joining-arm sections 10 of yokes 7a, 7b of a cross shaft universal joint 6 and the tip-end sections of a shaft section 17a of a cross shaft 8 regardless of variation in the dimensions of the joining-arm sections 10, the circular holes 15 in the tip-end sections thereof, and the cup bearings 18, and elastic deformation of the joining-arm sections 10 of the yoke 7a during press-fitting work, press-fitting punches 33 are used to pressure fit the cup bearings 18 to a preset reference position inside the circular holes 15, and the value of the pressure that is applied to the press-fitting punches at that instant is set as a reference pressure, and at the instant when the pressure applied to the press-fitting punches becomes larger than the reference pressure by a preset specified value, the cup bearings 18 are determined to have reached positions where press-fitting is complete.

A roller bearing configured to be mounted on a balancing shaft. The rolling bearing having an outer ring, a cage axially protruding beyond at least one side of the outer ring, and rollers mounted in the cage and in rolling contact with the outer ring. The cage provides at least one boss on a side that axially protrudes beyond the outer ring, the boss being dedicated to come into abutment against the outer ring in case of relative axial displacement between the cage and outer ring.

Bearing systems configured for use on a downhole tool may include a tensioner bolt having a complementary nut, the tensioner bolt and nut sized and shaped to secure the rolling cutter member to a head. A radial bearing may include an annular sleeve sized and shaped to surround the head. A shaft washer may be sized and shaped to surround the head between an enlarged head of the tensioner bolt and the annular sleeve. A bearing element may be configured for positioning proximate the head, the bearing element comprising an upper surface configured for sliding, frictional contact with a lower surface of the shaft washer.