A rolling deep groove ball bearing includes a bearing outer ring (1), a bearing inner ring (2), a plurality of large rolling balls (3) and special-shaped rollers (4), where the large rolling balls (3) and special-shaped rollers (4) are arranged between the bearing inner ring (1) and the bearing outer ring (2), and the large rolling balls (3) and the special-shaped rollers (4) are arranged at intervals. For the rolling deep groove ball bearing, the rolling balls (3) and the bearing raceway realize the pure rolling, where high linear velocity is subjected; the bearing capacity is large; the noise is low; the reliability is high and the service life is long. The deep groove ball bearing has no gap for installing balls and is simply assembled.

The invention is directed to a rolling bearing having at least one row of cylindrical rolling bodies for transmitting axial forces between two annular connection elements which are concentric to a common axis of rotation and which, for the purpose of rotation about the common axis of rotation, are spaced apart from one another by a gap, wherein the at least one row of cylindrical rolling bodies is so arranged that, in the unloaded state of the rolling bearing, the axes of rotation of all the cylindrical rolling bodies of the row lie in a common plane through which the common axis of rotation passes perpendicularly, wherein at least one raceway for the at least one row of cylindrical rolling bodies is in the form of a flat surface of a wire which has on its surface region complementary to the raceway surface an arcuate, convexly curved cross-sectional profile and is thereby inserted at least in some regions into a peripheral recess having a cross-sectional profile complementary thereto in an annular connection element.

In a bearing device 1, a plurality of columnar needle rollers 13 are provided. A cage 14 is provided in which the needle rollers 13 are arranged in parallel with each other along an axial direction R of a pin roller 9, so that the needle rollers 13 form a cylindrical configuration around the pin roller 9. The cage 14 has oppositely placed two rings 17 and a plurality of bridge pieces 18 bridged between the two rings 17, and having the bridge pieces 18 to rotatably accommodate the needle rollers 13 in order to achieve higher performances.

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 roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between said outer ring and said inner ring; and a plurality of retainer segments having a plurality of column parts extending in a direction along a shaft so as to form a pocket for holding said roller. A connection part extends in a circumferential direction so as to connect the plurality of column parts, and continuously lined with each other in the circumferential direction between said outer ring and said inner ring, in which a corner of a circumferential end face is chamfered. Also provided is a spacer arranged between the circumferentially arranged first retainer segment and last retainer segment, wherein a chamfered part is provided at a corner of a circumferential spacer end face of the space. The roller bearing can be used in a main shaft support structure of a wind-power generator.

A roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between said outer ring and said inner ring; and a plurality of retainer segments having a plurality of column parts extending in a direction along a shaft so as to form a pocket for holding said roller. A connection part extends in a circumferential direction so as to connect the plurality of column parts, and continuously lined with each other in the circumferential direction between said outer ring and said inner ring, in which a corner of a circumferential end face is chamfered. Also provided is a spacer arranged between the circumferentially arranged first retainer segment and last retainer segment, wherein a chamfered part is provided at a corner of a circumferential spacer end face of the space. The roller bearing can be used in a main shaft support structure of a wind-power generator.

A spacer device for roller elements of a toroidal roller bearing includes an inner ring and an outer ring. The toroidal roller bearing allows for axial and angular displacement between the inner and outer rings. The spacer device comprises a first roller element-contacting surface and a second roller element-contacting surface on opposite sides thereof. First and second roller-contacting surfaces are arranged to separate two adjacent roller elements in a tangential direction of the toroidal roller bearing when the spacer device is in use. Each of the first and second roller element-contacting surfaces has a concave shape adapted to conform to respective convex contacting surfaces of the roller elements. The spacer device comprises end members that have projections that extend outwards from first and second roller-contacting surfaces and which are arranged to extend at least partly over the ends of two adjacent roller elements when the spacer device is in use.

In a self-aligning roller bearing, in a longitudinal section including a center line of a spherical roller and an axis of the self-aligning roller bearing, a clearance X between an outer end surface of a spherical roller on an axially outer side of the self-aligning roller bearing and a rib portion, and a clearance Y between an inner end surface of the spherical roller on an axially inner side of the self-aligning roller bearing and a guide ring have a relation of X<Y.

Provided is an angular contact ball bearing that can have a load capacity increased by increasing the diameter of each ball and that is suitably used mainly to bear a thrust load. In the angular contact ball bearing, a plurality of balls are rollably interposed between an inner ring raceway groove formed on an outer peripheral surface of an inner ring and an outer ring raceway groove formed on an inner peripheral surface of an outer ring. The plurality of balls are retained by a plurality of separator retainers that are interposed between the adjacent balls and that are spaced apart from each other. A contact angle of each ball is within a range of 45 to 65.

The spacer for rolling bearing comprises an inner ring, an outer ring and at least one row of angular contact rollers disposed between raceways provided on the rings. The spacer comprises two opposite faces 17 having a concave profile adapted to the rollers, at least one of said faces comprising two contact surfaces 17a, 17b with the associated roller and a concave recess 17c extending between said contact surfaces and directed outwards towards said roller.