The invention relates to a zinc-free spray powder for thermally coating a substrate, in particular for thermally coating a bearing part of a bearing apparatus, which spray powder has the following composition except for unavoidable contaminants: tin=5% to 30% weight percent; aluminum=0.1% to 5% weight percent; iron=at most 1% weight percent, and copper=difference to 100% weight percent. The invention furthermore relates to a layer system applied via thermal spraying, a work piece, particularly a connecting rod, as well as a spray method for manufacturing a spray layer.

The invention relates to a sliding bearing element (1) with a running layer (4) made from a first tin-based alloy and an additional layer (5) made from an additional tin-based alloy, said alloys containing at least one element from a group comprising Cu, Ni, Ag, Sb, As, Pb, Bi, Te, Tl and/or non-metal particles. The first tin-based alloy has a strength index FI of at least 5 and at most 25, and the additional tin-based alloy has a strength index FI of at least 0.3 and at most 3. The strength index of the running layer (4) is at least five times the strength index of the additional layer (5), and the strength index FI is defined by the equation,

[00001]$\mathrm{FI}=100*.Math..Math.C+50*.Math..Math.S+2*\sqrt[2]{\left(100*.Math..Math.B\right)},$

in which C represents at least one of the elements Cu, Ni, Ag; S represents Sb and/or non-metal particles; B represents at least one of the elements Pb, Bi, Te, Tl; and represents the total content of each of the tin-based alloy components assigned to the letters C, S, and B.

A wind turbine gearbox, in particular planetary gearbox, has at least one gear which is mounted on an axle, wherein a sliding surface is arranged between the gear and the axle. The sliding surface is arranged on at least one layer of a deposition welded material made from a sliding bearing material. Furthermore, a method produces the wind turbine gearbox.

A hydraulic pump, in particular an adjustable axial piston pump, has at least one piston (22) movable in a reciprocating manner in a longitudinal direction within a pump housing during operation of the hydraulic pump. The piston (22) has a link head (24), a piston top (54) opposite the link head (24), and at least one hollow chamber (60) surrounded at least partially by a piston housing (62) that substantially or completely terminates each hollow chamber (60) towards the outside. A piston (22) for such hydraulic pump is also provided.

A multi-layer sliding bearing includes a sliding layer having a surface for contacting a component which is to be mounted. The sliding layer is made from a tin-based alloy with tin as the main alloy element and the sliding layer has on the surface, at least in sections, an oxidic subcoating in which the proportion of tin oxide(s) is at least 50% in weight.

A method for coating a pump component (23, 31), in particular, a part of an axial piston pump (7), having the steps of providing a blank of the component (23, 31), providing at least one recess in the blank, filling a powdery coating material into the associated recess, melting the coating material under a protective gas atmosphere and material-removing processing of the blank to form at least one sliding and/or bearing surface (6) from the coating.

An axial piston pump has a swash-plate construction, in particular for hydraulic systems. A cylinder drum (3) can be rotationally driven about a rotational axis (7) in a pump housing (1). Pistons (9) are axially displaceable and support at their actuation ends a swash plate (15). The swash plate can be pivoted by an adjusting device (21) to the desired angles of inclination relative to the rotational axis (7) for adjusting the stroke of the pistons (9) and the fluid pressure generated. The adjusting device has an adjusting piston (35) in a hydraulically actuated adjusting cylinder (31). Their movement can be transmitted to the swash plate (15) by a driven connection having a pivot joint (37, 39; 29, 43). The pivot joint is formed by a ball joint (37, 39) arranged between the piston (35) and the piston rod (41) of the adjusting cylinder (31).

The invention relates to a multi-layer sliding bearing (1) comprising a sliding layer (3) having a surface for contacting a component which is to be mounted. Said sliding layer (3) is made from a tin-based alloy with tin as the main alloy element and the sliding layer (3) has on the surface, at least in sections, an oxidic subcoating (6) in which the proportion of tin oxide(s) is at least 50% in wt.