In order to make a bearing, such as a roller bearing, insensitive to a lack of maintenance lubrication or irregular maintenance lubrication while at the same time retaining its mechanical performance, at least one bearing part of the bearing is provided at least partially with an oleophilic adhesion promoter layer. The adhesion promoter layer binds a lubricant layer of the bearing to the bearing part provided with the adhesion promoter layer. The adhesion promoter layer is bonded to an elemental-iron-free surface of a bearing part body. The removal of free iron from the bearing part body surface is carried out with nitric acid, chromate solution and/or citric acid. The treated bearing part has an oleophilic anti-corrosion adhesion promoter layer. The bearing may be used in pressure-operated devices, in particular in turbine handpieces used by dentists, because the loss of the lubricant layer during operation of the device was particularly high.

A magnetic bearing device comprises a stator (30) and a rotor (10) supported in the stator for rotation around a rotation axis (R). The rotor comprises at least one permanent magnet (21, 22) that is magnetized along the rotation axis. The stator comprises at least one closed magnetic core (31) that surrounds the rotor (10) and at least one radial bearing winding (32) arranged on the closed magnetic core (31) in a toroidal configuration. The at least one radial bearing winding is arranged to interact with a permanent magnetic field generated by the at least one permanent magnet to obtain a radial bearing force when current is supplied to the at least one radial bearing winding.

Provided are a bearing detection method, a bearing detection system, a method for starting a gas turbine and a system for starting a gas turbine. The bearing detection method includes: starting a rotor to enable the rotor to rotate at a first rotating speed along a first direction, wherein the first direction is a rotating direction when the rotor operates normally, and the first rotating speed is a calibration value; acquiring a first torque, wherein the first torque is an output torque when the rotor rotates at the first rotating speed along the first direction; and judging the first torque and a torque threshold value, wherein the torque threshold value is a calibration value, and if the first torque is smaller than the torque threshold value, it is judged that a bearing is fault-free.

The current invention relates to an electrically actuated device for orientating an optical element around a rotational axis comprising a rotor and a stator, said rotor comprising said axis, said axis comprising an optical end and an electronic end, the stator comprising a means for generating a magnetic field; the device further comprising a first axial rotation bearing associated with said optical end and a second axial rotation bearing associated with said electronic end, each bearing comprising an inner part and an outer part; said device further comprising electronic actuation means for providing a charged particle having a velocity v moving through a conductor provided on said rotor, wherein the axis is able to perform a rotational movement over less than 180, and whereby the orientation of said axis is controlled by a Lorentz force resulting from said charged particle moving in said magnetic field; wherein said device comprises axis-related clamping means configured to exert an axial force on the inner parts of the bearings toward each other for axially clamping said axis, thereby radially fixating said axis with respect to each of the inner parts of the bearings.

A transport system for delivery or retrieval of a biostimulator, such as a leadless cardiac pacemaker, is described. The biostimulator transport system includes a docking cap supported by a bearing within a bearing housing. The bearing allows relative rotation between a torque shaft connected to the docking cap and an outer catheter connected to the bearing housing. The bearing housing and the docking cap include respective bearing retainers that constrain the bearing within the bearing housing without a weld attachment. The weldless retainers of the biostimulator transport system provide a robust mechanical securement of the bearing that is not vulnerable to corrosion. Other embodiments are also described and claimed.

One aspect relates to a rolling element for a ball bearing wherein the rolling element has: (i) a Young modulus E in the range up to and including 100 GPa; and (ii) a yield strength Rp.sub.0.2 in the range up to and including 1800 MPa, or wherein the rolling element has at least an alloy of nickel (Ni) and titanium (Ti), wherein the weight ratio of Ni:Ti in the alloy is in the range of from 57:43 to 50:50. One aspect is a rolling bearing with: a. at least an outer ring; b. at least an inner ring, wherein a raceway is defined by the arrangement of the outer ring and the inner ring; and c. at least three rolling elements wherein the rolling elements are arranged in the raceway, wherein at least one rolling element comprises at least an alloy as mentioned above.

The current invention relates to an electrically actuated device for orientating an optical element around a rotational axis comprising a rotor and a stator, said rotor comprising said axis, said axis comprising an optical end and an electronic end, the stator comprising a means for generating a magnetic field; the device further comprising a first axial rotation bearing associated with said optical end and a second axial rotation bearing associated with said electronic end, each bearing comprising an inner part and an outer part; said device further comprising electronic actuation means for providing a charged particle having a velocity v moving through a conductor provided on said rotor, wherein the axis is able to perform a rotational movement over less than 180, and whereby the orientation of said axis is controlled by a Lorentz force resulting from said charged particle moving in said magnetic field; wherein said device comprises axis-related clamping means configured to exert an axial force on the inner parts of the bearings toward each other for axially clamping said axis, thereby radially fixating said axis with respect to each of the inner parts of the bearings.

A rolling bearing includes an outer ring, an inner ring, a plurality of rolling bodies, and a seal member. An outer peripheral portion of the seal member is fixed by a retaining ring to a groove portion formed on an inner peripheral surface of the outer ring and an inner peripheral portion of the seal member is elastically deformable. The seal member includes an inclined portion. 1?Ts/Sct?10 is satisfied when Ts is a circumferential gap of the retaining ring at a time when the seal member and the retaining ring are attached to the groove portion of the outer ring and Sct is an axial thickness of a part of the seal member in contact with the retaining ring.

A rolling bearing includes an outer ring, an inner ring, a plurality of rolling bodies, and a seal member. An outer peripheral portion of the seal member is fixed by a retaining ring to a groove portion formed on an inner peripheral surface of the outer ring and an inner peripheral portion of the seal member is elastically deformable. The seal member includes an inclined portion. The seal member satisfies 0.25?Skn/Skt?2.5 when Skn is a radial length from an inclination start part of the inclined portion on an inside in an axial direction to an outermost diameter position of a part of contact of the seal member with an outer peripheral surface of the inner ring and Skt is a thickness of the inclined portion in a direction perpendicular to an inclination direction.

A ball bearing assembly includes at least two units being axially coupled together to allow at least one set of plural spherical balls adapted to be installed between at least one pair of two adjacent units of the at least two units.