Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a fixed inner element configured to receive a screw, a rotating outer element that is mounted to rotate coaxially about the fixed inner element and is intended to cooperate with the transmission element, and an annular protective flange bearing against a lateral surface of the fixed inner element. The fixed inner element provides a sleeve axially protruding from the lateral surface. The flange provides an inner axial portion mounted securely on an outer surface of the sleeve.

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: A pulley device for supporting a belt of chain tensioning idler or a runner roller includes a bearing having an outer ring mounted for rotation relative to a coaxial inner ring and at least one pulley part that is C-shaped in cross section. The pulley part has an inner portion with a frustoconical inner surface mounted on an outer cylindrical surface of the outer ring, an outer cylindrical portion having an outer cylindrical surface configured to support a belt or a chain, and an intermediate portion extending radially inward from the cylindrical outer portion to the inner portion. The pulley part is integral and has an open end on an axial side opposite the intermediate portion. The frustoconical surface extends inwardly towards the outer ring, and the inner surface is force fitted onto the outer cylindrical surface of the outer ring.

Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a pulley, a bearing, and an annular protective flange. The flange provides a first radial portion of small diameter, the first radial portion bearing against a fixed inner ring of the bearing, a second radial portion of large diameter, and a substantially axial intermediate portion connecting the first and second radial portions. The intermediate portion forms a circumferential trough, the bottom of which is offset radially towards the inside of the pulley device compared with the outer edge of the fixed inner ring.

Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a fixed inner element, a rotating outer element that is mounted to rotate coaxially about the fixed inner element, and an annular protective flange having a substantially radial portion bearing against a front surface of the fixed inner element. The flange includes an annular folded portion extending substantially axially from an outer edge of the flange and passing radially into the immediate vicinity of an axially protruding annular portion of the rotating outer element to form a narrow passage.

Abstract: A pulley device configured to support a belt of a chain tensioning idler or a runner roller includes a bearing having inner and outer rings and a pulley having at least one C-shaped pulley part mounted on the bearing outer ring with an inner cylindrical portion of the pulley part press-fitted on the bearing outer ring, the bearing outer ring having a material projection and the inner cylindrical portion of the pulley part having an axial groove configured to allow the material projection to slide axially through the groove when the pulley part is slid axially onto the outer ring, the material projection forming an axial stop for the pulley part when the pulley part is rotated relative to the bearing outer ring.

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. The outer cylindrical surface of outer ring is provided with at least one material deformation forming an axial stop for the pulley.

Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a fixed inner element configured to receive a screw, a rotating outer element that is mounted to rotate coaxially about the fixed inner element and is intended to cooperate with the transmission element, and an annular protective flange bearing against a lateral surface of the fixed inner element. The fixed inner element provides a sleeve axially protruding from the lateral surface. The flange provides an inner axial portion mounted securely on an outer surface of the sleeve.

Abstract: A cam follower roller device including a tappet body extending along a longitudinal axis and defining a tappet bore, a pin centered on a transverse axis, through holes having mounting ends for supporting the pin on the tappet body, and a roller rotatably mounted on the pin around the transverse axis, the roller having a cylindrical outer surface, a central cylindrical bore and two frontal end faces. Transverse gaps are provided between frontal end faces of the roller and the tappet bore, and the central cylindrical bore of the roller is mounted around an annular rolling surface of transverse convex profile.

Abstract: A clutch thrust bearing device includes a rolling bearing having a fixed ring, a rotatable ring, and a plurality of rolling elements between the rings; an axially movable piston disposed between a housing and the rolling bearing and having a radial plate pressing against an axial contact surface of the fixed ring; at least one resilient seal member sealing the piston relative to the housing; and a resilient body exerting an axial preload onto an axial contact surface of the rotatable ring. The rolling bearing is axially movable by the piston to compress the resilient body. A resilient sleeve is mounted to the fixed ring and has at least one sealing lip in sliding contact with the rotatable ring.

Abstract: A clutch thrust bearing device including a rolling bearing, an axially movable piston having a radial plate, and a resilient biasing member. At least one between the inner and the outer peripheries of the radial plate of the axially movable piston is provided with a bearing sealing element of resilient material having at least one sealing lip in sliding contact with the rotatable ring of rolling bearing.

Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a pulley, a bearing, and an annular protective flange. The flange provides a first radial portion of small diameter, the first radial portion bearing against a fixed inner ring of the bearing, a second radial portion of large diameter, and a substantially axial intermediate portion connecting the first and second radial portions. The intermediate portion forms a circumferential trough, the bottom of which is offset radially towards the inside of the pulley device compared with the outer edge of the fixed inner ring.

Abstract: A bearing, such as a plain bearing or a rolling bearing, including at least one coating on at least one surface of at least one element of the bearing, the at least one coating including at least one sensor that is integrated into the coating, the sensor being a nanosensor that includes at least one nanoparticle.

Abstract: A pulley device for a tensioner roller or winding roller of a transmission element, having a fixed inner element configured to receive a screw, a rotating outer element that is mounted to rotate coaxially about the fixed inner element and is intended to cooperate with the transmission element, and an annular protective flange bearing against a lateral surface of the fixed inner element. The fixed inner element provides a sleeve axially protruding from the lateral surface. The flange provides an inner axial portion mounted securely on an outer surface of the sleeve.

Abstract: The pulley device for a tensioner roller or an idler roller of a transmission element having a pulley and a bearing. The bearing is provided with a rotating external ring mounted to the pulley, and with a fixed internal ring, a radial space being defined between the rings, with rear sealing means and front sealing means closing the radial space on each axial side, and with at least one row of rotating elements arranged in the radial space. The fixed internal ring is provided on its rear side with a circumferential groove for collecting pollution which is machined on an external surface of the ring, the circumferential groove being offset axially in relation to the rear sealing means outside the radial space.

Abstract: A cam follower roller device having a tappet body extending along a longitudinal axis and defining a tappet bore, a pin centered on a transverse axis and providing two opposite ends arranged in through-holes transversally facing one another on tappet body, and a roller rotatably mounted on the pin around said transverse axis. The tappet body is a machined metal tube or bar and is provided with a radial plate that is securely fixed within tappet bore, said radial plate being dedicated to support a longitudinally movable piston.

Abstract: A clutch thrust bearing device includes a rolling bearing having a fixed ring, a rotatable ring, and a plurality of rolling elements between the rings; an axially movable piston disposed between a housing and the rolling bearing and having a radial plate pressing against an axial contact surface of the fixed ring; at least one resilient seal member sealing the piston relative to the housing; and a resilient body exerting an axial preload onto an axial contact surface of the rotatable ring. The rolling bearing is axially movable by the piston to compress the resilient body. A resilient sleeve is mounted to the fixed ring and has at least one sealing lip in sliding contact with the rotatable ring.

Abstract: A clutch thrust bearing device including a rolling bearing, an axially movable piston having a radial plate, and a resilient biasing member. At least one between the inner and the outer peripheries of the radial plate of the axially movable piston is provided with a bearing sealing element of resilient material having at least one sealing lip in sliding contact with the rotatable ring of rolling bearing.

Abstract: A bearing assembly including a chamber provided with a rolling bearing supporting a rotary shaft with respect to a fixed housing. The rolling bearing has a first ring and a second ring in relative rotation one each other, at least one row of rolling elements being arranged between the rings. The chamber having Ethanol in liquid and/or gaseous state. The rings are coated with diamond-like carbon (DLC) material.

Abstract: A pulley device configured to support a belt of a chain tensioning idler or a runner roller includes a bearing having inner and outer rings and a pulley having at least one C-shaped pulley part mounted on the bearing outer ring with an inner cylindrical portion of the pulley part press-fitted on the bearing outer ring, the bearing outer ring having a material projection and the inner cylindrical portion of the pulley part having an axial groove configured to allow the material projection to slide axially through the groove when the pulley part is slid axially onto the outer ring, the material projection forming an axial stop for the pulley part when the pulley part is rotated relative to the bearing outer ring.