Abstract: A mechanical assembly to precisely position large objects and align them to be joined with other objects with precision. The assembly does not require power to operate and can therefore be used in a variety of remote and harsh locations.

Abstract: Disclosed is a coated ceramic fiber including a silicon carbide coating layer adjacent to the ceramic fiber and a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Abstract: 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.

Abstract: A pulley device provides a pulley, and a bearing. The pulley has at least one C-shaped pulley part having an inner portion mounted on the bearing, an outer portion having an outer cylindrical surface dedicated to interact with a belt or a chain, and an intermediate portion extending substantially radially between axial ends of inner and outer portions on one axial side of pulley device. A grip surface portion is provided to one surface among the outer cylindrical surface of the outer ring and the inner cylindrical surface of the inner cylindrical portion of the pulley part, the grip surface portion including a plurality of indentations and recesses.

Abstract: Disclosed is a coated ceramic fiber including a silicon carbide coating layer adjacent to the ceramic fiber and a silicon dioxide coating layer adjacent to the silicon carbide coating layer, wherein the silicon dioxide coating layer forms micro cracks after a crystal structure transformation. The coated ceramic fiber may be included in a composite material having a ceramic matrix.

Abstract: A linear guide device includes at least one linear guide unit which has a guide housing, in which two annularly closed circulating channels are formed in each of which a multitude of roller bearing elements is received. The guide housing has a single-piece housing intermediate element which contributes to the formation of the circulating channels and through which passes at least one lubrication channel which communicates with the circulating channels. The lubrication channel passes through the single-piece housing intermediate element and extends partly also in an integral pipe-stub-like lubrication appendix of the single-piece housing intermediate element, wherein the lubrication appendix includes a lubrication opening which is accessible from outside the guide housing for bringing in lubricant.

Abstract: A heat treatment apparatus for performing heat treatment of treatment objects inside a cylindrical body by heating the cylindrical body and rotating the cylindrical body around an axis, includes a pair of movable support parts provided on opposite ends of the cylindrical body along the axis of the cylindrical body so as to be able to move along the axis and rotatably support the cylindrical body around the axis, and a fixed support part provided between the pair of the movable support parts along the axis so as to be unable to move along the axis and rotatably support the cylindrical body around the axis. The cylindrical body is supported by a three-point support of the pair by the movable support parts and the fixed support part.

Abstract: Provided is an air permeation resistant film in which flexibility can be imparted to the film without remarkably increasing the proportion of a rubber constituting a dispersed phase. An air permeation resistant film comprising (A) a thermoplastic polyester elastomer which comprises a block copolymer containing a polyester as a hard segment and has a melting point of from 180 to 230° C., and (B) a rubber, in a mass ratio (A)/(B) of from 90/10 to 40/60, wherein the component (A) and the component (B) are melt-kneaded to perform dynamic crosslink, thereby forming a continuous phase composed of the component (A) and a dispersed phase composed of the component (B), and the film has an air permeation coefficient at 80° C. of 5×1013 fm2/Pa·s or less and Young's modulus of 120 MPa or less.

Abstract: A rotor system for a rotating machine, including a rotating shaft, an auxiliary bearing, and a primary bearing configured to provide a bearing and seal combination. The auxiliary bearing may include a support structure extending around a circumference of the rotating shaft, such that an annular gap is defined between the support structure and the rotating shaft when the primary bearing supports the rotating shaft. The auxiliary bearing may also include a first pedestal extending radially-inward from the support structure, and first and second beams extending from opposite sides of the first pedestal in a plane perpendicular to an axis of the shaft. The auxiliary bearing may further include a first roller operatively coupled to the first beam, and a second roller operatively coupled to the second beam, such that the first and second rollers are configured to engage the shaft.

Abstract: The disclosure describes a driving device for a mill including a gear ring, suitable for being fastened to a grinding chamber, a first reduction transmission suitable for transmitting a rotation from a first motor to the gear ring, the reduction transmission comprising a case, an output module including an output pinion and an output shaft defining an output axis. The gear ring has helical teeth, the output pinion has helical teeth, the or each output module can be inserted in a single piece into the associated case in an insertion direction or removed in a single piece from that associated case in a removal direction. The driving device includes a disconnectable connecting element suitable for rotatably connecting the output shaft to a transmission element and allowing, in a disconnected state, a rotation of the output pinion around the output axis upon removal of the output module outside the case or during insertion of the output module into the case.

Abstract: A method for disassembling a low-pressure process apparatus. The method provide a transmission device and a low-pressure process apparatus; and moves the housing to a transmission device in a first horizontal direction via the first roller set.

Abstract: A roller bearing includes an outer ring having a substantially cylindrical internal bearing surface and an outside surface defining a plurality of protuberances. A protective coating is applied to the outside surface of the outer ring. An inner ring is coaxially disposed at least partially in the outer ring and has a substantially cylindrical external bearing surface. The external bearing surface and the internal bearing surface define an annular cavity in which a plurality of rolling elements is disposed. The rolling elements are in rolling engagement with the external bearing surface and the internal bearing surface. The outside surface of the outer ring can be case hardened, for example the outer ring can be carburized. The outside surface of the outer ring can be knurled. A method of manufacturing such a bearing is also disclosed.

Abstract: A self adjusting bearing for use on a CT gantry is provided. The self adjusting bearing is configured to be mounted on a main frame of the CT gantry and is configured to support a rotating base of the CT gantry wherein the self adjusting bearing includes a roller, a first component, and a second component, the roller is configured to support the rotating base and is rotatably mounted on the first component, the second component is configured to be mounted on the main frame, and the first component and the second component are configured to rotatably engage each other such that they can rotate relative to each other during the mounting of the self adjusting bearing.

Abstract: An auxiliary bearing including a support structure extending at least partially around a circumference of a shaft. A first pedestal may extend in a radially-inward direction from the support structure. First and second beams may extend from opposite sides of the first pedestal in a plane perpendicular to an axis of the shaft. First and second rollers may be operatively coupled to the first and second beams, and the first and second rollers may be configured to engage the shaft.

Abstract: An auxiliary bearing including a support structure extending at least partially around a circumference of a shaft. A first pedestal may extend in a radially-inward direction from the support structure. First and second beams may extend from opposite sides of the first pedestal in a plane perpendicular to an axis of the shaft. First and second rollers may be operatively coupled to the first and second beams, and the first and second rollers may be configured to engage the shaft.

Abstract: A horizontal hinged closure with a large diameter track ring attached directly to the rear of a female threaded head. The threaded female head is designed to removably attach to a male threaded structure. A bearing ring with cam followers that engage the track ring to allow the threaded head to be rotated relative to the male threaded structure to attach and remove the threaded head there from. The bearing ring is attached to a hinge arm that allows the removed threaded head to be moved away from the male threaded structure and then rotated about a vertical axis. Direct attachment of the large diameter track ring to the rear of the threaded head moves the center of gravity forward, resulting in the threaded head remaining essentially vertical when it is removed from the male threaded structure and thereby making it easier to reattach to the male threaded structure.

Abstract: A turning roll system for rotating a cylindrical workpiece about a workpiece axis comprises a pair of idler rollers cooperating with a pair of drive rollers to support the workpiece. To oppose axial drift of the workpiece, each idler roller is rotatably journalled on a respective idler axle such that the axis of rotation of the idler roller is oriented obliquely relative to a pivot axis of the idler axle. The idler axles may be pivoted about their respective pivot axes to adjust the orientation of the idler roller axes relative to the workpiece to introduce an axially directed force component acting on the workpiece to counter axial drift. Pivoting of the idler axles may be automatically controlled based on a signal generated by a drift sensor arranged to detect axial drift of the workpiece.

Abstract: A telescopic boom broadly comprises an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and a guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, a second roller assembly attached to one end of the outer boom, and a mid roller assembly positioned proximal to the second roller assembly. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. The second roller assembly includes roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. The mid roller assembly includes a third roller bar that engages guide rails positioned on the inner boom.

Abstract: A self adjusting bearing for use on a CT gantry is provided. The self adjusting bearing is configured to be mounted on a main frame of the CT gantry and is configured to support a rotating base of the CT gantry wherein the self adjusting bearing includes a roller, a first component, and a second component, the roller is configured to support the rotating base and is rotatably mounted on the first component, the second component is configured to be mounted on the main frame, and the first component and the second component are configured to rotatably engage each other such that they can rotate relative to each other during the mounting of the self adjusting bearing.

Abstract: A telescopic boom broadly comprises an elongated hollow outer boom, an elongated inner boom telescopically received within the outer boom, and a guidance structure for guiding the inner boom for telescopic movement is provided. The guidance structure includes a plurality of guide rails attached to the interior corners of the outer boom, a first roller assembly attached to one end of the inner boom, a second roller assembly attached to one end of the outer boom, and a mid roller assembly positioned proximal to the second roller assembly. The first roller assembly includes a plurality of wheels mounted on axles for engaging the guide rails. The second roller assembly includes a pair of roller bars positioned on opposed sides of one end of the outer boom for guiding the inner boom during telescopic movement. The mid roller assembly includes a third roller bar that engages guide rails positioned on the inner boom.

Abstract: A rotational bearing configured to support a first body for rotation relative to a second body about a rotational axis, one of the first or second bodies being a rotational body and the other being a support body, the rotational bearing comprising a plurality of carrier rollers. Each carrier roller is individually mounted to the first body for rotation about a respective carrier roller rotational axis extending therefrom. Each carrier roller is in rolling contact with the second body.

Abstract: A roller assembly includes a hermitically sealed roller defining a longitudinal axis of rotation. An external bearing supports the roller. In one embodiment, the bearing includes a plurality of fingers defining a bearing surface. In one embodiment, the roller is laterally moveable through an opening in the bearing to a support position. In one embodiment, the roller may lock the bearings against a support structure. An external bearing and a method of assembling a roller assembly are also provided.

Abstract: A bearing system comprises a support member and a rotational element having a generally cylindrical bearing surface, and a plurality of detents defined upon and extending in from the cylindrical bearing surface, and may include means for rotating the rotational element in relation to the support member. The bearing system also comprises at least three bearing assemblies, each comprising a cam member rotatably mounted to the support member. Each of the cam members comprises a cam surface having a profile that contacts the cylindrical bearing surface and rotates away from a home position when the cam is rotatably positioned to meet one of the bearing regions, and does not contact the cylindrical bearing surface when the cam is rotatably positioned to meet one of the detent regions. Each of the cam members are rotationally biased toward their home position.

Abstract: A system and method for reducing roller skew, which involve ascertaining first and second thrust load properties applied to a roller while a rotary body rotates in opposing rotational directions, and adjusting an orientation of at least one bearing assembly for the roller until an amplitude difference between the first and second thrust load properties is below a predetermined threshold.

Abstract: The invention relates to a rotor block (1) comprising a housing (2) with at least one connection surface (3A) that absorbs the load and pivot bearing seats (4) for plain and/or anti-friction bearings (5) that are designed to support a rotor (6). To dismount the rotor (6) from the housing (2), the plain and/or anti-friction bearings (5) can be dismantled from the exterior and the rotor (6) from a side (8) lying transversally to the bearings. The pivot bearing seats (4) take the form of recesses (9) that are directly configured in the housing wall, without the use of annular bodies. To facilitate the mounting and dismounting processes and to improve the precision of the rotor alignment, the pivot bearing seats (4) are configured in such a way that they form a segment greater than a semi-circle around the plain and/or anti-friction bearings (5), leaving a section open on one side (8) in relation to said bearings (5), thus forming a narrowing (13).

Abstract: A bearing mount of a rotatable printer drum having a rotational axis includes a main drum bearing, rotationally supporting the drum and having an outer bearing race, and at least two secondary roller bearings, angularly spaced from each other. The secondary roller bearings are positioned to rollably support the outer bearing race and allow lateral translation of the main bearing.

Abstract: A supporting disk for providing bearing support to a rotor of an open-end spinning machine, the supporting disk including a bearing ring and a supporting ring which is made of an elastic polymeric material and mounted on the periphery of the bearing ring. The bearing ring has a side ring on at least one of the sides of its outer edge. The side ring is located at a distance from the outer edge, connected to the bearing ring via holding members, and is also provided with a supporting ring on its periphery.

Abstract: A precision machine tool, comprising a table which is suspended so that it is substantially a swivelable table; a driving element for driving a tood during machining of a part; and a device for orienting said table, said orienting device including at least three orienting elements, each including a plurality of rolling bodies which are brought successively into a contact with a surface of said table on which work pieces to be machined are located.

Abstract: A dynamic bushing and/or gripper mechanism comprises an apparatus for retaining a tubular member in a position during processing so that the tube does not move transverse to the longitudinal axis of the bushing, but wherein the tube may be rotated within the confines of the bushing and/or in the case of the gripper mechanism the tube may be moved longitudinally within the confines of the gripper.

Abstract: To further reduce the manufacturing cost of a shell type needle roller bearing, and to ensure high quality of the shell type outer ring by subjecting the outer ring to a heat treatment that needs no adjustment of the atmosphere. The steel sheet to be formed into the shell type outer ring 1 by pressing is made of a medium to high carbon steel containing carbon by not less than 0.3 mass percent. With this arrangement, the material cost and thus the manufacturing cost are lower than when using a conventional low-carbon structural alloy steel sheet or a steel sheet for cold rolling and pressing. Also, it is possible to ensure high quality of the outer ring by subjecting the outer ring to simple heat treatment without the need for carburizing or carbonitriding, which needs adjustment of the atmosphere.

Abstract: A sliding bearing, e.g. journal bearing, including at least two bearing elements the bearing surfaces of which are slidably supported with respect to each other. At least one of the surfaces is provided with a first type of cavity which may comprise a lubricating substance, the first type of cavity being defined by a specific range of geometric properties. At least one surface is provided with at least a second type of cavity which may comprise a lubricating surface, the second type of cavity being defined by geometric properties which are different from the geometric properties of the first type of cavity.

Abstract: A ball transfer device is disclosed herein. An embodiment of the ball transfer device includes a chamber, wherein a first opening and a second opening extend into the chamber. A ball is located between the first opening and the second opening and is movable within the chamber. The movement extends between a first position and as second position, wherein a portion of the ball is movable into the first opening when the ball is in the first position.

Abstract: The radial antifriction bearing has an outer bearing ring, an inner bearing ring and roller bodies, which are arranged between the bearing rings, are held at uniform distances from one another in the peripheral direction by a bearing cage. The roller bodies are discs that each have two parallelly arranged lateral surfaces which are symmetrically flattened from a spherical basic shape. In order to prevent edge stresses between the discs and the raceways, at least the raceway in the inner bearing ring, on its outer edge areas, transition into a logarithmically decreasing profile.

Abstract: A medical or dental handheld element has a rotatably arranged rotary part, at least one roller bearing for bearing support of the rotatably arranged rotary part, the roller bearing having at least one rotatable roller bearing part that is co-rotational with the rotary part and at least one stationary roller bearing part that is stationary in relation to the rotary part, and an anti-twist device or anti-rotation element provided to restrict the stationary roller bearing part from rotating. The anti-twist device comprises a polygonal, generally arc-shaped, open metallic anti-twist device. A handheld element with this anti-twist device is less sensitive to the effects of sterilization or cleaning processes. Also disclosed is a method for manufacturing such a handheld element.

Abstract: A rotational bearing configured to support a first body for rotation relative to a second body about a rotational axis, one of the first or second bodies being a rotational body and the other being a support body, the rotational bearing comprising a plurality of carrier rollers. Each carrier roller is individually mounted to the first body for rotation about a respective carrier roller rotational axis extending therefrom. Each carrier roller is in rolling contact with the second body.

Abstract: A fastening arrangement between a riding ring and a casing of a rotary cylinder, whereby the riding ring encircles the casing of the rotary cylinder with clearance, including support elements affixed to the casing of the rotary cylinder and projecting radially outwardly. The riding ring has at least one circular groove on a surface thereof. A plurality of clamping elements are distributed around a perimeter of the riding ring, the distributed clamping elements engaging in a force-fit manner with the circular groove of the riding ring. The clamping elements are connected with the support elements, whereby the riding ring is immobilized in both the axial and circumferential directions relative to the casing of the rotary cylinder. The support elements affixed to the rotary cylinder casing have spring guides oriented axially relative to the rotary cylinder, between each of which is positioned a clamping element tensioned in a force-fit manner on the riding ring.

Abstract: A drive mechanism mounted on a frame (10) equipped with a body (16) containing at least one inner bearing race (24) defining an axis of rotation (26), comprises a single-piece drum (48) located entirely on a first side of a radial plane of reference (34). This drum is equipped with a tread (50) that can cooperate with a drive belt, an opening in which the body is inserted, and at least one outer bearing race (54) located opposite the inner bearing race (24). A shaft (30) solidly attached to a turning element (36) extending on a second side of the geometrical plane of reference, passes through the body and is fixed to the drum by linking means (40), which extend radially between the shaft and the drum, and are tangential to a geometrical plane (62) which is perpendicular to the axis of rotation (26) and is located at a greater distance from the transversal plane of reference than the bearing races.

Abstract: Methods and apparatuses for rotatably supporting movable components, including canards. An apparatus in accordance with one embodiment of the invention includes an airfoil configured positioned external to an aircraft fuselage. A connecting portion can depend from the airfoil portion and can have an attachment portion configured to attach to an aircraft internal to the aircraft fuselage. Rollers carried by one of the connecting portion and the fuselage can rotatably contact a track carried by the other of the connecting portion and the fuselage.

Abstract: A support for a material web for use with a longitudinal cutting device for cutting the material web, includes a support shaft having an axis of rotation. At least one bearing mechanism positions the at least one support shaft, wherein the at least one bearing mechanism has an axis of rotation outside of the axis of rotation of the support shaft.

Abstract: A double roller cam follower includes a longitudinal beam having a first end and a second end, a cam roller rotationally mounted on the beam for engaging a cam lobe and a valve stem roller rotationally mounted on the second end of the beam for engaging a valve stem. The cam roller includes a stepped outer circumference having a larger diameter at its sides to engage the cam lobe and a smaller diameter positioned centrally between the flanking larger diameters to provide clearance between the cam roller and the valve stem roller.

Abstract: To improve the known step bearings for the support of open-end spinning rotors, it is proposed to design the bearing body with a machine-side support and a rest for the spinning rotor. According to the invention, a flat bearing surface constituting one end of the bearing body is provided as the rest for the spinning rotor. The flat bearing surface is preferably designed as a bearing plate of an aerostatic step bearing capable of being subjected to compressed air.

Abstract: Proposed is a support disk bearing for an open-end spinning rotor. The support disk possesses a body, which, on its circumferential surface, is designed to receive a cover layer. The cover layer is comprised of rubber, in particular nitrile rubber (NBR). In an advantageously favorable formulation, the cover layer contains an additive for the reduction of its electrical resistance.

Abstract: The invention relates to a supporting roller set for tiltable, axially movable and rotatable support for a rotary drum which can be driven in rotation. It comprises two supporting rollers which lie symmetrically on both sides of a vertical longitudinal central plane of the rotary drum and are each mounted in two rotary bearings which are fixed on bedplate which is tiltably supported on a static foundation. In order to be able to achieve an optimal self-adjustment with easy action of each supporting roller, each bedplate is supported by way of two articulated bearings disposed at a transverse spacing from one another on the foundation, of which the inner articulated bearing is constructed in the form of a ball-and-socket bearing, whilst the outer articulated bearing forms a movable bearing and is supported on the foundation so as to be slidably movable about the central point of the ball of the inner articulated bearing.

Abstract: A supporting disk for supporting a rotor, in particular the rotor in open-end spinning rotors, having a hub ring and a supporting ring positioned on the outer circumference of the hub ring, having a bearing surface for the rotor, the outer circumference of the hub ring and the inner circumference of the supporting ring being connected to each other with form locking; the supporting ring (3), in cross-section, being formed from a running part (4) provided with bearing surface (10) for the rotor and at least two anchor legs (7, 8) extending from running part (4) and directed radially inwardly as well as axially outwardly.

Abstract: The invention relates to a supporting roller set for tiltable, axially movable and rotatable support for a rotary drum which can be driven in rotation. It comprises two supporting rollers which lie symmetrically on both sides of a vertical longitudinal central plane of the rotary drum and are each mounted in two rotary bearings which are fixed on bedplate which is tiltably supported on a static foundation. In order to be able to achieve an optimal self-adjustment with easy action of each supporting roller, each bedplate is supported by way of two articulated bearings disposed at a transverse spacing from one another on the foundation, of which the inner articulated bearing is constructed in the form of a ball-and-socket bearing, whilst the outer articulated bearing forms a movable bearing and is supported on the foundation so as to be slidably movable about the central point of the ball of the inner articulated bearing.

Abstract: Proposed is a support disk for a support disk bearing for a open-end spin rotor, which support disk possesses a body (5), which, on its circumferential surface is designed to receive a cover layer (143) The cover layer 143 is comprised of rubber, this being in particular nitrile rubber (NBR). In an advantageously favorable formulation, the cover layer (143) contains an additive for the reduction of its electrical resistance.

Abstract: The present invention relates to a bearing for an open-end spinning rotor. The latter is driven at its rotor shaft by means of a tangential belt in a predetermined direction and is supported in a nip which is formed by at least two bearing disks capable of being driven by the rotor shaft. A bearing disk (at least one) leads in relation to the drive direction of the tangential belt rotating into the nip, and another bearing disk (at least one) trails in relation to the drive direction of the tangential belt rotating out of the nip. The axis of the bearing disk (at least one) rotating into the nip is at a specified distance from the plane which goes through the rotor shafts of the spinning rotors of several adjoining open-end spinning devices. This distance is being smaller than the distance between the axis of the bearing disk (at least one) rotating out of the nip and the rotor shaft plane.

Abstract: A supporting plate for the support of a rotor, in particular of an open-end spinning rotor, having a hub ring and a support ring arranged on the exterior periphery of the hub ring. The support ring has a contact surface for the rotor, the exterior periphery of the hub ring and the interior periphery of the support ring are joined to each other with positive locking. The support ring has a cramp-like shape in cross-section and is formed from a bridge part, provided with the contact surface for the rotor, the bridge part having two lateral clamping anchors emerging from the respective ends of the bridge part and oriented to the inside both radially as well as axially.

Abstract: An apparatus and method for polishing a workpiece including a polishing pad, and at least one polishing arm for holding a workpiece to be polished on the polishing pad. The polishing arm includes at least one plastic bearing. The plastic bearing prevents lock up of a vacuum chuck coupled to the polishing arm because it is impervious to slurry which often becomes lodged in conventional ball bearings.

Abstract: For a bearing arrangement of an open-end spin rotor, which is rotatably set in the “V” between circumferential rims of support disks, one or more of the support disks (14), which bear the open-end spin rotor, has a circumferential cleaning groove (3). The cleaning groove (3) can be a self closing, endless groove, which runs over the contact surface of the support disk (14), wherein it generally does not run parallel to the edges of the support disk (14). Such a meandering groove formulation of the support disk circumference assures that no deposits of impurities can accumulate on the rotor shaft.