A method of manufacturing a gear shaft including depositing only a first material via directed energy deposition (DED), forming a first portion of the gear shaft via the depositing only the first material via directed energy deposition (DED), forming a transitioning portion of the gear shaft via depositing of a varying ratio of the first material with a second material via DED, and forming a second portion of the gear shaft via the depositing via DED of only the second material.

A half thrust bearing for a crankshaft of an internal combustion engine is formed of a back metal layer and a bearing alloy layer to have a slide surface and two thrust reliefs. Each thrust relieve includes a first region, where the back metal layer is exposed, on a circumferential end surface side, and a second region, where the bearing alloy layer is exposed, on the slide surface side while the slide surface includes two third regions adjacent to the second region, and a fourth region between the two third regions. A circumferential end region consists of the first, second and third regions. In the second region and the third regions, the bearing alloy layer includes a uniform thickness portion at a radial center, and a decreased thickness portion adjacent to an inner-diameter-side end surface.

A bearing component such as a bearing ring includes a metallic base body and at least one alloy steel coating on the base body, the coating being applied to the base body by deposition welding. The base body is preferably non-alloy steel or cast iron, and the alloy includes at least one carbide-forming transition metal such as niobium, tantalum, zirconium, titanium, hafnium, tungsten, molybdenum, vanadium, or manganese. The coating can form a raceway of the bearing component or a structural element such as a flange. Also a method of forming such a bearing component is provided.

Gearboxes for aircraft gas turbine engines, in particular arrangements for journal bearings such gearboxes, and related methods of operating such gearboxes and gas turbine engines. A gearbox for an aircraft gas turbine engine includes: a sun gear; a plurality of planet gears surrounding and engaged with the sun gear; and a ring gear surrounding and engaged with the plurality of planet gears, each of the plurality of planet gears being rotatably mounted around a pin of a planet gear carrier with a journal bearing having an internal sliding surface on the planet gear and an external sliding surface on the pin.

Presented are crankshaft assemblies with internal stiffening structures, methods for making/using such crankshaft assemblies, and internal combustion engines equipped with such crankshaft assemblies. A crankshaft body, which is formed with a first material, includes multiple bearing journals that are mutually coaxial to rotate on a crankshaft axis and spaced from each other along the length of the crankshaft. Each bearing journal has an internal journal cavity. Multiple crankpins are longitudinally spaced from each and axially offset from the crankshaft's rotational axis. Each crankpin has an internal crankpin cavity. Multiple crank webs project radially from the crankshaft axis and interconnect the bearing journals with the crankpins. Each crank web has an internal web cavity. Disposed within the journal cavities, crankpin cavities, and/or web cavities is a stiffening bar formed with a second material having a modulus of elasticity that is greater than the modulus of elasticity of the first material.

An aluminum alloy for a slide bearing of the present invention contains: 0 mass % or more and 10.0 mass % or less of Sn and 0 mass % or more and 5.0 mass % or less of Si, 0 mass % or more and 2.0 mass % or less of Cu as a solid-solution strengthening component, at least one of 0.05 mass % or more and 0.35 mass % or less of Cr, 0.05 mass % or more and 1.5 mass % or less of Mn, and 0.05 mass % or more and 0.3 mass % or less of Zr as a precipitation strengthening component, 2.3 mass % or more and 6.0 mass % or less of Ag, a part of which is dissolved to form a solid solution and the rest of which is precipitated, and the balance consisting of unavoidable impurities and Al.

Gearboxes for aircraft gas turbine engines, in particular arrangements for journal bearings such gearboxes, and related methods of operating such gearboxes and gas turbine engines. A gearbox for an aircraft gas turbine engine includes: a sun gear; a plurality of planet gears surrounding and engaged with the sun gear; and a ring gear surrounding and engaged with the plurality of planet gears, each of the plurality of planet gears being rotatably mounted around a pin of a planet gear carrier with a journal bearing having an internal sliding surface on the planet gear and an external sliding surface on the pin.

The invention relates to a foil bearing (10) having at least one foil (16, 18) which is arranged and fixed in place inside a bearing bore (14) of a bearing support (12). The bearing support (12) is made of aluminum or an aluminum alloy, wherein the surface of the bearing bore (14) is provided at least in one contact region (20) of the at least one foil (16, 18) with a hard material layer (26). The bearing support (12) can be produced in a simple and cost-effective manner, has a low weight and a good thermal conductivity.

A shaft connection, e.g., for a motor vehicle driveline, comprises a metal shaft tube material and a metal connecting element. The connecting element comprises a connecting portion with an outer toothing which is pressed with a press fit into a connecting portion of the shaft tube so that an interlocking connection effective in the circumferential direction is formed for torque transmission, wherein the connecting element comprises a maximum outer diameter in the region of the outer toothing; wherein the shaft tube comprises an axial connecting region which is formed radially inwardly into a section of the connecting portion that is reduced relative to the outer toothing so that an interlocking axial connection effective in the axial direction is formed between the shaft tube and the connecting element for transmitting axial forces. A drive shaft can have such a shaft connection.

A housing element for food applications having a casing made of metallic material and a cover made of composite material and having a bottom surface which is closed or provided with a through-hole. The housing element is provided with a system for securing the cover on the casing, comprising at least two steps which are formed on the cover and which engage with interference inside at least two corresponding grooves formed on the casing.