A rolling-element bearing subassembly includes a first bearing ring having an axial face lying in a plane and a plurality of rolling elements on a running surface of the first bearing ring. The first bearing ring is connectable to a second bearing ring to form a rolling-element bearing. An annular retaining body having a first leg connected to a second leg by a bridge, the first leg being shorter than the second leg, is mounted on an axial face of the first bearing ring with the first leg contacting the axial face so that the bridge is located on a first side of the plane and the second leg extends through the plane to define an annular gap between a portion of the first bearing ring and the bridge and a portion of the second leg for retaining a lubricant.

A bearing assembly includes an inner ring and an outer ring that define a bearing interior between them and either the inner ring or the outer ring is fixed. When the inner ring is fixed, the inner ring includes at least one substantially radial through opening and when the outer ring is fixed, the outer ring includes at least one substantially axial and/or radial through opening, or at least one substantially axial and/or radial through opening is provided on a ring fixedly connected to the outer ring. The through opening is disposed between a 9 o'clock position and a 3 o'clock position on the inner ring when the inner ring is fixed or on the outer ring when the outer ring is fixed.

A ball bearing includes an inner ring, an outer ring, and a cage that supports balls. At least one portion of each prong of the cage overlaps with an inner ring raceway surface in an axial direction and the entirety of the prongs do not overlap with a shoulder of the inner ring in the axial direction. A pocket of the cage overlaps with virtual conical planes that are parallel to a reference virtual conical plane including an inner ring nominal contact point and an outer ring nominal contact point, and that are part, on the other axial side, of both a virtual conical plane including an edge between the inner ring raceway surface and the shoulder of the inner ring and a virtual conical plane including an edge between the outer ring raceway surface and the outer ring counter-bored portion.

A bearing system for a rotating vertical shaft includes a first ball bearing, having a first pitch diameter and a first axial stiffness and a second ball bearing having a second pitch diameter and a second axial stiffness. The first ball bearing is a deep groove Conrad bearing. The second ball bearing is an angular contact bearing. The first and second ball bearings are coaxial, secured to one another and rotatable together. The first pitch diameter is at least 1.5 times greater than the second pitch diameter. The bearing system has an axial stiffness ratio defined by the first axial stiffness divided by the second axial stiffness. The axial stiffness ratio is based on an axial preload force applied to the second outer ring such that an operating torque of the bearing system is within a predetermined range at temperatures from minus 40 to positive 85 degrees Celsius.

Provided is a rolling bearing, in particular for a wind turbine, including an inner race, an outer race, a plurality of rolling elements arranged between the inner race and the outer race, and lubricant for lubricating the rolling bearing, wherein the inner race and the outer race each have a bearing surface with a contact zone in contact with the rolling elements, the bearing surface of at least one of the inner race and the outer race has a portion having a lipophobic surface for repelling the lubricant. The suggested rolling bearing has the advantage that the lubricant in the bearing does not stick to the portion, where it is useless for lubricating the bearing. Therefore, the rolling bearing can have a better lubrication, since the lubricant is directed towards the contact zone, where contact between the races and the rolling elements takes place.

A cover comprises a substrate and a grease lid. The substrate comprises a main body comprising a branched grease pathway, a locating side comprising a grease supply port, and a lubricating side comprising a plurality of grease ports. The grease lid constrains the branched grease pathway and is configured so that when grease enters the locating side grease supply port, the grease traverses the branched grease pathway and exits the grease ports.

Sensor sets for bearings are disclosed, e.g., for mechanical bearings. The set may include a plurality of modules, which may include one or more functional modules configured to measure bearing state variables. The functional modules may each have an electrical interface that is compatible with one another. At least one of the functional modules may be an acceleration measurement module configured to measure an acceleration which occurs on an oscillating component of the bearing. The acceleration measurement module may be configured to output an acceleration measurement signal. One or more infrastructure modules may be included for realizing communication tasks and/or for storing and/or processing pre-specified and/or recorded data. The infrastructure modules may each have an electrical interface such that they are interoperable with at least one of the functional modules. At least one of the infrastructure modules may be a signal evaluation unit configured to evaluate the acceleration measurement signal.

A seal structure includes a rotary shaft that is provided inside a housing, a metal-made surrounding portion of the housing that surrounds the rotary shaft in a radial direction of the rotary shaft, and a resin-made seal member that faces an inner circumferential surface of the surrounding portion and rotates together with the rotary shaft.

A lubrication system for an enclosed rolling element bearing may be achieved through a channel drilled through the outer race of the bearing and the outer surface of the bearing housing. The channel provides a direct path for the injection of lubricant via a grease gun or syringe to reach the rolling elements within. The lubrication system can be adjusted to assure lubricant does not leak from the channel with the addition of a tube or hollow screw or combination of the two along the entirety of the channel.

A vehicle main electric motor includes: a ring-shaped filling chamber, which is formed in contact with a ball bearing and a roller bearing in a direction of a rotation shaft, for filling with a semi-solid lubricant, and which has a central axis concentric with the rotation shaft; and a discharge section connected to the filling chamber, for inflow of the semi-solid lubricant from the filling chamber. A display member, which has a specific gravity lower than a specific gravity of the semi-solid lubricant, is arranged, in an interior of the discharge section, at an initial position that is a position not reached by the semi-solid lubricant during an initial greasing. The discharge section has a retaining part for retaining, at a movement position that is a determined position within the discharge section, the display member moving in a greasing direction due to pressure of the semi-solid lubricant during a supplemental greasing. At least a portion of visible light from the exterior reaches at least a portion of the movement position.