A bearing arrangement is disclosed for a drilling head, through which flushing liquid flows, of a deep drilling device, having multiple radially outer and radially inner bearing rings. Radially outer bearing rings are arranged coaxially over radially inner bearing rings, balls roll in raceways of the bearing rings, and the raceways are delimited axially on both sides by shoulders with mutually opposite shoulder surfaces. In order for a bearing arrangement to be of short axial extent and to simplify the construction, the internal diameter (Di) of the shoulder surfaces of the radially outer bearing rings and the external diameter (Da) of the shoulder surfaces of the radially inner bearing rings are dimensioned such that the shoulder surfaces perform the function of parallel radial plain bearings with a radial clearance (S).

A bearing arrangement is disclosed for a drilling head, through which flushing liquid flows, of a deep drilling device, having multiple radially outer and radially inner bearing rings. Radially outer bearing rings are arranged coaxially over radially inner bearing rings, balls roll in raceways of the bearing rings, and the raceways are delimited axially on both sides by shoulders with mutually opposite shoulder surfaces. In order for a bearing arrangement to be of short axial extent and to simplify the construction, the internal diameter (Di) of the shoulder surfaces of the radially outer bearing rings and the external diameter (Da) of the shoulder surfaces of the radially inner bearing rings are dimensioned such that the shoulder surfaces perform the function of parallel radial plain bearings with a radial clearance (S).

Disclosed is a secondary clamping device for a wheel. Two bearings and a spacing ring are closed in a base by a bearing end cover, a shaft sleeve is mounted on the bearings, a linear bearing and a gland are fixed on the shaft sleeve, a positioning pin is fixed at the top of the floating shaft, two ends of the spring A are respectively connected with the positioning pin and the linear bearing, and the positioning pin can move up and down under the action of the spring A. A pull rod is fixed on the gland, the outer wall of the floating column is connected with the inner hole of the shaft sleeve, two ends of the spring B are respectively connected with the gland and the floating column.

A rotating shaft assembly comprising a rotating shaft mounted within a casing and a primary bearing assembly in bearing engagement with the shaft and the casing and positioned between the shaft and the casing. The assembly also includes a secondary bearing assembly comprising a secondary bearing normally radially spaced from the shaft and arranged to engage with or contact the shaft in the event of failure of the primary bearing normally in contact with the shaft, and an inspection member to provide an indication of frictional engagement of the secondary bearing with the shaft.

A rotating shaft assembly comprising a rotating shaft mounted within a casing and a primary bearing assembly in bearing engagement with the shaft and the casing and positioned between the shaft and the casing. The assembly also includes a secondary bearing assembly comprising a secondary bearing normally radially spaced from the shaft and arranged to engage with or contact the shaft in the event of failure of the primary bearing normally in contact with the shaft, and an inspection member to provide an indication of frictional engagement of the secondary bearing with the shaft.

A drive train of a wind turbine is disclosed as having a rotatable hub, a gearbox, a rotatable rotor shaft extending between the rotatable hub and the gearbox, and a main bearing assembly supporting the rotatable rotor shaft, the main bearing assembly having a main bearing housing enclosing one or more compound bearings, each of the one or more compound bearings having at least two axial thrust bearings and a radial bearing.

A planetary gear mechanism comprises a sun gear, a planetary gear that meshes with the sun gear, a planetary carrier having a planetary shaft which axially supports the planetary gear, and a ring gear which meshes with the planetary gear; wherein: the planetary gear has a coaxially disposed first inside-diameter part and second inside-diameter part of different inside diameter; the planetary gear mechanism has a first bearing member that has an outside diameter conforming to the first inside-diameter part and a second bearing member that has an outside diameter conforming to the second inside-diameter part, the two bearing members being arranged between the planetary shaft and the planetary gear; and the planetary gear mechanism is easily assembled while having a configuration in which the two bearing members are interposed between the planetary shaft and the planetary carrier so as to be coaxially divided in the axial direction.

A clutch is provided that includes a fixed sheave portion, a movable sheave portion, a movable sheave assembly, an idler bearing and a torque drag member. The movable sheave assembly is configured to axially move the movable sheave portion in relation to the fixed sheave portion in response to a change in a rotational speed of the clutch. The idler bearing is rotationally mounted on a central post of the fixed sheave portion. The idler bearing is positioned to engage an inside face of a belt when the fixed sheave portion and the movable sheave portion are located a select distance away from each other. The torque drag member is operationally coupled to exert a select amount of torque drag on the idler bearing.

A rolling bearing has an outer diameter surface of the outer ring which is a fitting surface with a housing and the inner diameter surface of the inner ring, which is a fitting surface with a shaft. The outer diameter surface of the outer ring or the inner diameter surface of the inner ring is coated with a bonded film containing an organic binder, a solid lubricant powder such as molybdenum disulfide powder, and a friction/wear modifier such as antimony oxide powder. According to the rolling bearing, a creep resistance is kept excellent without causing increase in cost and size and being deformed and softened.

A universal joint having a retainer ring that secures a bearing cup to a cross shaft. A bearing cup retainer may secure the bearing cup to the retainer ring. A cross shaft retainer may secure the retainer ring to the cross shaft. A seal may extend from the body of the retainer ring to the cross shaft.