Abstract: A rolling-element bearing includes inner and outer rings and a cage between the rings, the cage having a plurality of cage segments with lateral boundary walls defining a receiving pocket for a rolling element having a diameter Dw, the pockets being dimensioned such that in a load-free state the rolling elements are positionable in the receiving pockets with a circumferential clearance (c) on the pitch circle between adjacent boundary walls of the pocket such that the clearance satisfies the relationship: cmax?c?Cmin, where: cmin=0.01*Dw?0.5 mm and cmax=0.02*Dw?0.4 mm, and wherein the diameter (Dw) of the rolling-element bearing is at least 50 mm.

Abstract: A roller tappet includes a housing, and the housing includes a first housing element and a second housing element. The first housing element has a receiving region configured to receive a roller of the roller tappet, and the second housing element is separate from the first housing element and is forged. The first housing element may be formed from metal sheet.

Abstract: A rolling-element bearing cage includes first and second axially spaced side rings and a plurality of bridges disposed between the first and second side rings. A pair of circumferentially adjacent bridges defines with the first and second axially spaced side rings a receiving pocket configured to receive a rolling element, and each of the plurality of bridges has first and second axially spaced running surfaces. The first and second running surfaces are disposed at first and second axially spaced end regions of the receiving pocket, and a circumferentially recessed region is disposed between the end regions such that a rolling element in a receiving pocket does not contact the recessed region.

Abstract: A landing bearing for use in a magnetic bearing assembly is provided. The landing bearing includes a first landing surface configured to be mounted on a shaft and a bushing having a second landing surface configured to be mounted in a housing or in a stator coaxially with the landing sleeve. The second landing surface is arranged so as to face the first landing surface. It is proposed that at least one of the first landing surface and the second landing surface is provided with at least one recess for receiving lubricant.

Abstract: A tubular bushing that is co-moldable with tubs of washing machines, the tubular bushing is engaged by a drive shaft of the washing machine, that extends along a central axis (A) and is provided with two rolling bearings, arranged at a given distance from each other along the axis (A) to rotatably support the drive shaft of the washing machine with respect to the tub. The tubular bushing further provides a containing sleeve, made of plastic material and co-molded around the two bearings; the sleeve defining an axial communication duct between two sides of the tubular bushing, the duct being closed, at least during co-molding, by a disposable cap, engaged in an annular edge of the containing sleeve.

Abstract: A hub unit includes a hub of light material forming a cylindrical portion, a flange and a radial recess having a surface facing the flange, and two bearing rings axially aligned around the cylindrical portion of the hub; a sleeve locking device is radially interposed between the cylindrical portion of the hub and the bearing rings, and comprises a retaining portion engaged in the radial recess of the hub, a terminal edge which preloads the bearing rings, and one or two cuts extending in an axial direction.

Abstract: A fluid seal of the present invention is disposed between an outer surface, i.e. engine block or any other part that requires application of the assembly and a rotatable member, such as, for example a shaft, wherein the seal circumscribes the shaft and lubricated the shaft and the same rotates around the axis. The seal present a cross section with plurality of channels that allow maximum expose of the seal to a salt bath thereby improving curing process and physical characteristics of the seal. A method of forming such fluid seal is disclosed in the present application.

Abstract: A friction-enhancing lacquer contains a binder and hard material particles. The hard material particles include a titanium-boron compound or consist of a titanium-boron compound, such as titanium diboride. The friction-enhancing lacquer is applied to the surface of a machine part, such as a bearing component, in order to increase its coefficient of friction and minimize or prevent slippage relative to another machine part clamped thereto.

Abstract: A bearing assembly comprises a bearing enabling a rotatable body to rotate about a rotational axis relative to a stationary body. The bearing includes a bearing inner ring and a bearing outer ring, each having at least first and second roller body tracks provided in or on non-parallel surfaces of the ring. The respective roller body tracks of the bearing outer ring are aligned with the respective roller body tracks of the bearing inner ring and a row of roller bodies is disposed between each of the respective sets of roller body tracks. At least one of the rows of roller bodies comprises one of tapered rollers and spherical rollers, at least one of the rows of roller bodies supports at least axial forces and at least one of the rows of the roller bodies supports at least radial forces.

Abstract: A control device for controlling the position of a rotor supported by active magnetic bearings is provided. The control device includes a trajectory planning module for generating a requested position, speed and acceleration; a feedback unit for generating a position feedback value and a speed feedback value; a first correction circuit for generating a first command signal according to the difference between the requested position and speed and the position and speed feedback value respectively; a feed-forward controller for generating a second command signal; an adder for adding first and second command signals and delivering a third command signal for a non-linear inversion circuit connected to the adder for generating flux command signals for the electromagnets, and a second correction circuit for generating voltage command signals for the power amplifiers which control the current flowing in the electromagnet coils of the active magnetic bearings.

Abstract: A bearing device including a clamping ring for retaining and preloading a bearing in a housing, and a sensor unit for detecting at least one state variable of the bearing. The sensor unit is embedded in a recess of the clamping ring.

Abstract: A bearing component formed of a steel comprising: (A) from 0.8 to 2.5 wt. % C, (B) from 3.5 to 4.5 wt. % Cr, (C) from 3.9 to 11.25 wt. % Mo, (D) optionally one or more of the following elements: (D1) from 0 to 8.2 wt. % W, (D2) from 0 to 11 wt. % Co, (D3) from 0 to 0.5 wt. % Ni, (D4) from 0 to 6.75 wt. % V, (D5) from 0 to 0.35 wt. % Si, (D6) from 0 to 0.4 wt. % Mn, (D7) from 0 to 0.3 wt. % S, and (D8) from 0 to 0.05 wt. % P, and (E) the balance iron, together with unavoidable impurities.

Abstract: A sealing device including a first annular shield fixable to a first ring, a second annular shield facing the first and fixable to a second ring. A first shield annular sliding sealing lip cooperating with the second ring. At least first and second annular non-contacting sealing lips of the second shield. The first non-contacting lip includes a first portion extending in projection, and a second end extending axially and radially projecting from the first portion; being tapered towards a free end thereof, axially away from the first ring, which come into contact axially when the first annular lip is bent towards the first shield. The second non-contacting lip extends axially projecting from the first shield from the same side as the second portion of the first lip and beyond it and forms towards the first lip an annular collecting channel of possible contaminants which pass beyond the first annular lip.

Abstract: A roller bearing element for a large roller bearing includes the following features: at least one contact zone for a roller bearing counter element, the contact zone has an induction-hardened surface layer, the roller bearing element is comprised of a steel, which includes an admixture of carbon of at least 0.46 mass %.

Abstract: A valve stem seal (1) seals a valve stem (4) that is reciprocally movable in an axial direction. The valve stem seal includes a base body (8) that is connectable with a valve stem guide (6). A first seal lip (10) is resiliently positioned relative to the base body via an elastic connection (16) and seals the valve stem relative to an oil chamber (24). A second seal lip (12) is spaced in the axial direction (2) from the first seal lip and seals the valve stem relative to a gas chamber. The second seal lip is also resiliently positioned relative to the base body via the elastic connection.

Abstract: A warning device having a close range wireless interface is provided. The warning device includes a body portion, top portion, a base portion, a microcontroller for controlling the device, a battery, at least one sensor for sensing at least one of a velocity, an enveloped acceleration and a temperature reading of the bearing, and at least one illuminating device for displaying the health status of the bearing. The close range wireless interface includes an RFID tag having an integrated circuit, and a radio, an antenna for receiving and transmitting modulated and demodulated signals, and a digital bus connecting the microcontroller to the RFID tag. The microcontroller stores at least one of the sensed velocity, enveloped acceleration and the temperature values into a memory disposed within the RFID tag. The memory is a dual access memory that enables data transfer via the RFID radio or via the digital bus.

Abstract: A rolling-element bearing cage section for a rolling-element bearing is configured to guide at least one rolling element between a first and a second rolling-element bearing ring of the rolling-element bearing. The rolling-element bearing cage section is configured to partially or completely receive the at least one rolling element prior to installation in the rolling-element bearing. The rolling-element bearing cage section includes a porous material adapted to absorb a lubricant and release the lubricant as a result of a centrifugal force acting on the lubricant during rotation of the rolling-element bearing cage section, thus allowing a liquid lubricant to be used in a rolling-element bearing without the need for complex seals.

Abstract: A journal cross of a universal joint includes a base body from which four journals extend outwardly, each journal of the four journals having a cylindrical section and an outer diameter and a length in an axial direction of the journal. The four journals are formed as tubular structures, an inner diameter of each of the tubular structures is at least 67% of the outer diameter of each of the tubular structures, the journal cross is formed as a one-piece component from which the four journals as well as the transitions between the four journals are also formed, and the four journals merge in a common cavity which is formed in an interior of the journal cross.

Abstract: An adjustable chock (100) of a modular design comprises a first element (102), a second element (108), a center element (104), and a center stud (106). In operational use of the chock, the first element engages with a piece of machinery (101) and the second element engages with a support (103). The first element (102) and the center element (106) have complementarily shaped contact surfaces to allow for lateral adjustment of the first element relative to the second element. The center stud (106) is connected to the center element (104) through a screwed connection. The center stud (106) is connected to the second element (108) through another screwed connection. The modular design allows using the same first element (102), the same second element (108) and the same center element (104) with center studs of different lengths.

Abstract: A shaft seal includes first and second rings, each formed from first and second discrete arc segments, mounted on a shaft. The first ring includes a central opening and a flange projecting axially away from a first axial surface of the first ring around the central opening, and the flange has a radially outer surface. The second ring has a radial inner face defining a central opening that includes a first portion extending from a first axial face of the second ring and a second portion extending from a second axial face of the second ring, and the second ring is mounted to the first ring with the second portion in contact with the radially outer surface of the flange. A plurality of fasteners extend from the second ring into an axial surface of the first ring or from the first ring into an axial face of the second ring.