The present invention concerns a friction piece (10) suitable for operating in a lubricated medium at a temperature higher than 200° C. The piece (10) comprises a metal surface (12) and an external coating (14) composed of tungsten carbide doped with nitrogen WC(N) with an atomic ratio of nitrogen between 5 and 12%. The invention also relates to a mechanical system (1) comprising such a piece (10). The invention also relates to a method for implementing such a piece (10).

The present invention concerns a friction piece (10) suitable for operating in a lubricated medium at a temperature higher than 200° C. The piece (10) comprises a metal surface (12) and an external coating (14) composed of tungsten carbide doped with nitrogen WC(N) with an atomic ratio of nitrogen between 5 and 12%. The invention also relates to a mechanical system (1) comprising such a piece (10). The invention also relates to a method for implementing such a piece (10).

Implementations of a wheel bearing greater are provided. In some implementations, the wheel bearing greater may be connected to a pressurized grease source and used to pack grease into a bearing. In some implementations, the wheel bearing greater comprises a cylindrical portion configured to be inserted within an inner race of a bearing. In some implementations, the cylindrical portion comprises a solid cylinder having a channel extending around the outer surface of the cylindrical portion; a grease inlet port extending from an outer surface of a shoulder portion and through a portion of the cylindrical portion, and at least a first grease ejection port extending from the grease inlet port to the channel. The greater further comprises a shoulder portion secured to a first end of the cylindrical portion wherein the shoulder portion is larger in diameter than the cylindrical portion thereby creating a ledge around the cylindrical portion on the first end.

A bearing housing structure (101) comprises a support section (102) for supporting a bearing (117), a reception interface (103) for receiving lubrication grease, and grease channels (104-106) for conducting the lubrication grease to both sides of the bearing which are mutually opposite in the axial direction of the bearing. The bearing housing structure comprises exit conduits (107, 108) for allowing the lubrication grease to exit the bearing from the both sides of the bearing and a grease reservoir (109) for storing the lubrication grease exiting the bearing via one or more of the exit conduits. The bearing housing structure is capable of operating in different positions so that the axial direction of the bearing can be horizontal, vertical, or slanting.

A method for supplying a sliding process material to or removing it from a surface of an object to be slid using a sliding part including a plurality of sliding bodies each having a flat working surface, the sliding part is regularly moved, preferably by a second driving mechanism, in parallel with the working surfaces of the sliding bodies and in a direction different from a moving direction of the sliding bodies while the sliding bodies are regularly moved, preferably by a first driving mechanism, in parallel with the working surfaces. This configuration uniformly supplies the sliding process material to the surface of the object to be slid.

A lubrication ring for a mechanical expander (1) for sizing large pipes comprises a conventionally manufactured ring (12) made of steel, in particular construction steel. Fluid bores are provided in the ring (12). A part (13) of the lubrication ring (6) is manufactured by an additive manufacturing technology.

A lubrication ring for a mechanical expander (1) for sizing large pipes comprises a conventionally manufactured ring (12) made of steel, in particular construction steel. Fluid bores are provided in the ring (12). A part (13) of the lubrication ring (6) is manufactured by an additive manufacturing technology.

A lubricant supported electric motor includes a stator presenting an stator raceway, and a rotor movable relative to the stator and presenting a rotor raceway disposed in spaced relationship with the stator raceway to define a gap therebetween. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The stator defines at least one hydrostatic support chamber disposed in radially recessed relationship relative to the stator raceway and in fluid communication with the gap. The stator also defines a passageway disposed in fluid communication with the at least one hydrostatic support chamber for providing lubricant to the at least one hydrostatic support chamber and the gap. A flow restriction mechanism is disposed in fluid communication with the passageway for controlling and balancing a supply and pressure of the lubricant in the hydrostatic support chamber.

A lubricant supported electric motor includes a stator presenting an stator raceway, and a rotor movable relative to the stator and presenting a rotor raceway disposed in spaced relationship with the stator raceway to define a gap therebetween. A lubricant is disposed in the gap for supporting the rotor relative to the stator. The stator defines at least one hydrostatic support chamber disposed in radially recessed relationship relative to the stator raceway and in fluid communication with the gap. The stator also defines a passageway disposed in fluid communication with the at least one hydrostatic support chamber for providing lubricant to the at least one hydrostatic support chamber and the gap. A flow restriction mechanism is disposed in fluid communication with the passageway for controlling and balancing a supply and pressure of the lubricant in the hydrostatic support chamber.

A bending system includes a greasing unit configured to move in a right-left direction by way of a moving operation of an external operation member and to supply grease to a sliding contact part of a tool holder, and a greasing unit holder provided on one side in a right-left direction of a table and configured to support the greasing unit. The greasing unit includes a greasing unit main body, and an application member provided on the greasing unit main body and formed in a shape corresponding to the sliding part of the tool holder, the application member being configured to be able to be impregnated with the grease.