A bearing assembly includes a thermosetting plastic bearing carrier having a receptacle for holding a bearing ring of the bearing and an injection molded connector between an inner circumference of the receptacle and an outer circumference of the bearing ring made from a thermoplastic plastic. The connector may include axial end portions that radially overlap portions of the bearing carrier. Also a method for forming a bearing assembly.

A rolling device includes: an inner member that has a raceway face; an outer member that has a raceway face facing the raceway face; and rolling elements that are disposed between both raceway faces in a rollable manner, wherein at least one of the inner member and the outer member has a space formed therein. Further, a method for manufacturing a rolling device including an inner member that has a raceway face, an outer member that has a raceway face facing the raceway face, rolling elements that are disposed between both raceway faces in a rollable manner, and a space that is formed inside at least one of the inner member and the outer member by a 3D printer.

An arrangement for supporting one or more bearings of a crankshaft assembly of a hydraulic fracturing pump includes a frame and one or more bearing supports. The frame is of a first material and defines one or more bearing support profiles. The bearing supports are of a second material different from the first material of the frame. The bearing supports are cast-in-place within the corresponding bearing support profiles of the frame and are configured to be in contact with an outer race of the corresponding bearings of the crankshaft assembly. Compared to the first material of the frame, the second material of the bearing supports is more effective at preventing slippage of the bearings.

The invention provides a building block for a mechanical construction. The invention further provides a bearing, an actuator system, a housing, a hub, a mechanical connector and a gear box. The building block includes a first printed material being printed via an additive manufacturing process. The first printed material provides a framework of a second material different from the first printed material and at least partially embedded in the first printed material. The framework of the second material may be included in a hollow structure. Alternatively, at least a part of the framework of the second material may constitute at least a part of the inner wall of the hollow structure. The framework of the second material may be pre-fabricated or may also be generated via the additive manufacturing process. A benefit of this building block is that it allows an increase of strength while limiting the overall weight.

A flanged bearing ring is formed of two different materials joined together as a single piece, specifically a radially inner annular insert and a flanged, radially outer lightweight body formed about the insert. The insert has one or more inner raceways and is formed of a hard material, such as bearing steel. The outer body is made of a lightweight material, such as aluminium alloy, with a higher thermal expansion coefficient higher than that of the hard material from which the inner insert is formed. A radial projection formed on the insert extends into a radial groove of the outer body. The projection and the recess interlock the insert and the outer body so as to prevent relative movement.

A bearing unit comprising rolling elements, housed in a radially inner mounting seat of a casing. The bearing unit includes a radially outer and stationary coated ring provided with a metal ring and a liner of elastomeric material integral with a radially outer surface of the metal ring, a radially inner ring, which is rotatable with respect to an axis of rotation (X), and a row of rolling elements interposed between the coated ring and the radially inner ring. The elastomeric material of the liner is a vulcanized thermoplastic material. The liner is co-molded onto the radially outer surface of the metal ring and may include a cylindrical body and at least two annular protuberances which fit inside corresponding anchoring grooves formed on the surface of the metal ring.

A sliding material of the present invention includes an aluminum alloy added with Si, the sliding material having undergone annealing for the aluminum alloy, in which an amount of Si added is in a range from 7.0 to 12.6 mass, and a Si-rich region having a Si concentration of 17 mass % or more present in a field of view of observation of the aluminum alloy accounts for 5% or more in area ratio.

A bearing device includes a first ring and a second ring configured to rotate relative to one another and an insulating sleeve formed from a bushing and an electrically insulating lining. The lining is overmolded on the bushing and on the second ring and connects the bushing to the second ring. The radial internal or external surface of the bushing incudes at least one helicoidal groove and the lining incudes at least one fastening rib having a shape complementary to a shape of the at least one helicoidal groove that extends into the at least one helicoidal groove. The helicoidal groove extends circumferentially at least 360 degrees around the radial internal or external surface of the bushing or the radial internal surface of the bushing.

A bearing device includes a bearing having first and second rings, a bushing, and an electrically insulating insert overmolded between and connecting the bushing and a second radial side of the second ring. The second radial side has a cylindrical central portion and a cylindrical lateral part axially and radially offset from the cylindrical center portion. A connection face extends from the first cylindrical lateral part to the cylindrical center portion, and has a plurality of circumferentially spaced grooves. One of a plurality of first ribs of the electrically insulating bushing extends into a respective one of the plurality of first circumferentially spaced grooves. At least a portion of the connection face has a radial component.

A co-mouldable tube (10) includes with two rolling bearings (20) arranged along a respective axis (A) of rotation. A spacer (40) is interposed between the two rolling bearings (20) so as to give the co-mouldable tube (10) structural rigidity. A cylindrical containment sleeve (5) is co-moulded around the two rolling bearings (29) and the spacer (40). Two metal bushes (60) are interposed between the cylindrical sleeve (50) and the two rolling bearings (20) so as to be co-moulded together with the said cylindrical sleeve (50).