An annular ring having a contact portion, a raceway and a squirrel-type cage secured to the contact portion. The contact portion is formed from a first metal material, and the squirrel cage is formed from a second composite-type material including a matrix in which reinforcing fibres are embedded, the pierced portion of the squirrel cage being attached to an outer surface of the contact portion. Also, a bearing assembly with rolling elements having an outer ring, an inner ring coaxial with the outer ring, and a plurality of rolling elements housed between the raceway of the contact portion of the outer ring and a raceway of the inner ring.

An annular ring having a contact portion, a raceway and a squirrel-type cage secured to the contact portion. The contact portion is formed from a first metal material, and the squirrel cage is formed from a second composite-type material including a matrix in which reinforcing fibres are embedded, the pierced portion of the squirrel cage being attached to an outer surface of the contact portion. Also, a bearing assembly with rolling elements having an outer ring, an inner ring coaxial with the outer ring, and a plurality of rolling elements housed between the raceway of the contact portion of the outer ring and a raceway of the inner ring.

A support assembly for a bearing of a gas turbine engine including a spring finger ring positioned radially exterior to an outer race of the bearing. The spring finger ring includes an outer ring positioned radially exterior to the outer ring, an inner ring positioned radially interior to the outer ring, and a plurality of spring fingers extending between the inner and outer rings. One or more spring fingers configured as two-sided spring fingers including a first ligament coupled to the outer ring and extending at a first circumferential angle to a first radial bumper proximate to the inner ring and a second ligament coupled to the inner ring and extending at a different second circumferential angle to a second radial bumper proximate to the outer ring. The first and second radial bumpers define first and second radial gaps between the bumpers and the inner and outer rings, respectively.

A support assembly for a bearing of a gas turbine engine including a spring finger ring positioned radially exterior to an outer race of the bearing. The spring finger ring includes an outer ring positioned radially exterior to the outer ring, an inner ring positioned radially interior to the outer ring, and a plurality of spring fingers extending between the inner and outer rings. One or more spring fingers configured as two-sided spring fingers including a first ligament coupled to the outer ring and extending at a first circumferential angle to a first radial bumper proximate to the inner ring and a second ligament coupled to the inner ring and extending at a different second circumferential angle to a second radial bumper proximate to the outer ring. The first and second radial bumpers define first and second radial gaps between the bumpers and the inner and outer rings, respectively.

An outer-ring lubrication groove pattern formed in an outer-race raceway surface and an inner-race lubrication groove pattern formed in an inner-race raceway surface of a wave generator bearing of a strain wave gearing device are patterns in which linear lubrication grooves having very small widths and depths of several micrometers or less are arranged at fine pitches of several micrometers or less. The inner-race lubrication groove pattern includes a second groove pattern formed in long-axis-side inner-race raceway surface portions to hold the lubricant, and a first groove pattern formed in short-axis-side inner-race raceway surface portions to hold the lubricant and guide the lubricant to the second groove pattern. This configuration improves the contact state between balls and the inner-race and outer-race raceway surfaces of the wave generator bearing, thus reducing the coefficient of friction therebetween.

A device for centring and rotationally guiding a turbomachine shaft, including a rolling bearing including an outer ring, a bearing mount, a band interposed between the outer ring and the bearing mount and a device for connecting the outer ring to the bearing mount, including a device for the axial retention of the outer ring including an axial thrust flange downstream of and in contact with the fixing flange of the connecting device, and including a fixing hole for fixing together the fixing flange, the bearing mount and the axial thrust flange, which latter further includes a lug extending between two successive tabs of the elastically deformable device.

A bearing housing for a gas turbine engine has first and second housing members axially telescoped into each other at a slip joint. The first and second housing members extend circumferentially around a central axis for circumscribing a bearing cavity. The first housing member has a first bearing support for supporting a first bearing in the bearing cavity. The second housing member has a second bearing support for supporting a second bearing in the same bearing cavity. A seal is provided at the slip joint for sealing the bearing cavity.

A bearing housing for a gas turbine engine has first and second housing members axially telescoped into each other at a slip joint. The first and second housing members extend circumferentially around a central axis for circumscribing a bearing cavity. The first housing member has a first bearing support for supporting a first bearing in the bearing cavity. The second housing member has a second bearing support for supporting a second bearing in the same bearing cavity. A seal is provided at the slip joint for sealing the bearing cavity.

The present invention provides a bearing pressure plate and a dynamo-electric machine using the bearing pressure plate which are capable of avoiding breakage of a bolt by dispersing a stress when a load due to vibrations etc. is applied. A bearing pressure plate 5 has an annular inner ring portion 11 abutting against an outer ring 3Ba of a rolling bearing 3 that supports a rotation shaft 4, an annular outer ring portion 12 located at a radial direction outer side of the inner ring portion 11 and having a plurality of bolt holes 12b through which the outer ring portion 12 is secured to a fixing portion side with a plurality of bolts 12a, and bridge portions 13 integrally connecting the inner ring portion 11 and the outer ring portion 12 at positions except the bolt holes 12b in a circumferential direction.