A greasable bearing assembly may include an outer ring, an inner ring disposed within, and concentric with, the outer ring, and a plurality of balls disposed between the outer ring and the inner ring. A greasable seal may be disposed adjacent the outer ring and the inner ring, the greasable seal further comprising a toroidal shape comprising an outer face and an inner face. An outer ring-shaped surface may extend from the outer face to the inner face. An inner ring-shaped surface may extends from the outer face to the inner face. An intake opening may be disposed through the greasable seal and extend from the outer ring-shaped surface to the inner face. A securing member may be formed as a lip at the inner face to mateably couple between the inner ring and the outer ring.

Provided is disclosure for embodiments providing protection from electrical discharges for a rolling bearing assembly.

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.

A bearing sealing device includes two seals (inner and outer seals) sealing the space between the inner and outer races of a bearing to ensure higher seal performance, and also to reduce the area of the inner periphery of the outer race that needs to be ground. The bearing sealing device includes a ring constituted by a metal annulus, and a rubber part. The metal annulus is formed by cold pressing, and has a seal contact surface kept in contact with seal lips of the outer seal. The rubber part includes a press-fitted portion fixed to the inner periphery of the outer race. The inner race has, on its outer periphery, a cylindrical fitting surface to which the outer seal is press-fitted.

A rolling bearing has an inner and an outer bearing ring. Each bearing ring has an inner and an outer shell surface. The roller bearing has rolling elements, which roll on raceways provided on the respective shell surfaces of the bearing rings, and a sealing disc connected to one of the bearing rings and operatively connected in a sealing manner to the other bearing ring. To connect the sealing disc to the bearing ring, one of the shell surfaces of the one bearing ring includes a first connecting means and the sealing disc includes a second connecting means. The first connecting means provide a rotating engagement in which the second connecting means engage in a connected state of the bearing ring and the sealing disc.

A cam follower assembly includes a ball bearing having an outer ring and an inner assembly which includes two or more segments. The inner assembly is disposed in the outer ring with a full complement of balls disposed therebetween. The outer ring and inner assembly each include a race having a gothic arch cross sectional configuration that causes the balls to roll on two portions of each race.

A roller bearing module for a vehicle hub module having an outboard roller bearing and an inboard roller bearing. The roller bearing module provides a spacer coupling the outboard roller bearing to the inboard roller bearing. The spacer is arranged in an axial direction between the outboard roller bearing and the inboard roller bearing. The roller bearing module includes a first sealing structure arranged at an outwards facing side of the outboard roller bearing. The roller bearing module further includes a second sealing structure arranged at an inwards facing side of the inboard roller bearing.

A dental handpiece (1) having a drive (3) of a tool (4), which drive is located in a head housing (2), has at least one media-conducting line arranged in the head housing, which media-conducting line has an outlet opening to the tool, and a tool receptacle (16) arranged in a drive chamber, which tool receptacle is rotatably supported by means of a rolling bearing (11) in a support (14) of the head housing (2) on a side of the drive chamber facing the tool. The rolling bearing has an outer race (13), which is supported against the head housing (2) radially in the support (14) in the area of a raceway (22) and which has a sub-area (21), the outside diameter D2 of which is reduced compared to the outside diameter D1 in the area of the raceway (22). The head housing has a housing projection (23), which extends into the area of the reduced outside diameter D2, and the media-conducting line (17) runs at least partially through said housing projection (23).

A sealing device including a first member having a first cylindrical portion, of which end portion on an open side faces an outer side in a sealed space, and a second member having a second cylindrical portion, a disk portion, and an intermediate cylindrical portion. An end portion of the intermediate cylinder portion on an open side faces inner side in the sealed space. A communication path in a repeatedly bent shape communicating with the outer side is formed between the first cylindrical portion and the intermediate cylindrical portion when the sealing device is mounted in the sealed space. One of facing surfaces across the communication path is like a staircase in which steps are continuously provided to slope downward to the end portion of the intermediate cylindrical portion on an open side, and the other surface includes a plurality of protruding portions protruding to approach the one surface.

Provided is a seal member for rolling bearing, which includes a seal body, and a coating layer that contains an antiozonant and silicone oil, and is formed on a surface of the seal body. The seal member for rolling bearing can be produced by applying on a surface of the seal body, a coating composition containing 10 to 30% by weight of an antiozonant and 3 to 10% by weight of silicone oil, the antiozonant and the silicone oil being dispersed in a solvent.