An escape wheel serving as a mechanical component includes an axle member, and an escape gear portion serving as a rotation member which has a holding portion for holding the axle member, and a rim portion having a plurality of tooth portions. The holding portion has a plurality of projection portions formed to project into a through-hole into which the axle member is inserted. An elastic portion extending from between the projection portions adjacent to each other is provided between the holding portion and the rim portion.

An escape wheel serving as a mechanical component includes an axle member, and an escape gear portion serving as a rotation member which has a holding portion for holding the axle member, and a rim portion having a plurality of tooth portions. The holding portion has a plurality of projection portions formed to project into a through-hole into which the axle member is inserted. An elastic portion extending from between the projection portions adjacent to each other is provided between the holding portion and the rim portion.

A timepiece component includes a core made of material suitable for electroforming, containing nickel-phosphorus or made of nickel-phosphorus, which core is, at least locally, coated with a surface layer of gold or gold alloy, to improve its tribological behaviour in areas including the surface layer of gold or gold alloy. The component is made by a fabrication method that includes the steps consisting in preparing a composition suitable for creating a solid core by a LIGA or electroforming method; shaping the solid core by a LIGA or electroforming method; coating the solid core, at least locally in areas subject to friction, with a gold or gold alloy surface layer.

A timepiece component includes a core made of material suitable for electroforming, containing nickel-phosphorus or made of nickel-phosphorus, which core is, at least locally, coated with a surface layer of gold or gold alloy, to improve its tribological behaviour in areas including the surface layer of gold or gold alloy. The component is made by a fabrication method that includes the steps consisting in preparing a composition suitable for creating a solid core by a LIGA or electroforming method; shaping the solid core by a LIGA or electroforming method; coating the solid core, at least locally in areas subject to friction, with a gold or gold alloy surface layer.

The device for pivoting an arbor of a rotating member, on a determined pivot axis, inside a timepiece movement includes at least one magnetic bearing including a magnet which exerts a force of attraction on a pivot made of magnetic material, of the arbor, and an endstone arranged between the magnet and the pivot, the endstone being formed of a material having a hardness greater than 500 HV and a friction coefficient less than or substantially equal to 0.1 with the material of which the pivot is made. The material forming the endstone has a high magnetic permeability and the endstone has, in cross-section to the pivot axis, smaller dimensions than those of the magnet, said endstone being arranged in the timepiece movement to be centred on the determined pivot axis.

The device for pivoting an arbor of a rotating member, on a determined pivot axis, inside a timepiece movement includes at least one magnetic bearing including a magnet which exerts a force of attraction on a pivot made of magnetic material, of the arbor, and an endstone arranged between the magnet and the pivot, the endstone being formed of a material having a hardness greater than 500 HV and a friction coefficient less than or substantially equal to 0.1 with the material of which the pivot is made. The material forming the endstone has a high magnetic permeability and the endstone has, in cross-section to the pivot axis, smaller dimensions than those of the magnet, said endstone being arranged in the timepiece movement to be centred on the determined pivot axis.

An element for radial guiding of a pivot of a rod of a rotating wheel, for example a rod of a balance, for a bearing of an horological movement, in particular shock-absorbing, the guide element including a body configured to cooperate with a bearing unit in such a way as to be maintained in the unit, the body defining a space for radial retention of the pivot, to maintain the rod radially while allowing it to rotate. The radial guide element includes at least three localized radial-bearing parts distributed angularly, the three parts defining the radial retention space, each part having a face for contact with the pivot, each face locally having a cylindrical shape convex towards the inside of the radial retention space, the bearing parts having an elongated body.

A pivot axis for a horology movement, including at least a part made of pure tungsten or of a tungsten alloy with at least a portion of the part converted into a layer of tungsten carbide (5).

A pivot axis for a horology movement, including at least a part made of pure tungsten or of a tungsten alloy with at least a portion of the part converted into a layer of tungsten carbide (5).