Geometric inspection device for horological mobile components

A geometric inspection device for horological mobile components, comprising:

• a headstock bearing a first rotatable spindle with a first hole defining a first axis of rotation;
• a tailstock bearing a second spindle defining a second axis of rotation, arranged on a common sole relative to which at least one of the headstock and the tailstock can move according to at least one degree of freedom in translation along alignment guiding means along a common direction parallel with the first axis of rotation;
• and
• means arranged to at least one of ensure and set the coaxiality of the second axis of rotation relative to the first axis of rotation, wherein
• the second spindle includes a second hole of the same diameter as the first hole,
• the device includes a plurality of removable and interchangeable micro-centering devices,
• each micro-centering device is arranged to be inserted indifferently into one of the first hole and the second hole,
• each micro-centering device includes a peripheral shoulder of a diameter arranged for a tight sliding fit thereof with one of the first hole and the second hole, and
• each micro-centering device includes a ferromagnetic or magnetic polar core arranged to cooperate in attraction with a magnetic pole included in at least one of the headstock and the tailstock and which defines one of a magnetic field of revolution about the first axis of rotation in a space separating the headstock and the tailstock, and a magnetic field formed by the polar core.