Device for correcting the alignment of the internal threads of a cartridge bearing for a chainset

A device for correcting the alignment of drilling and/or machining of a housing of a chainset arranged transversally to the frame of a cycle, the housing comprising a casing formed by a pair of substantially cylindrical tubular half-casings inserted respectively into one of the openings of the housing to position at least one element of a pedalling effort or chain tension effort sensor, the effort sensor being inserted into the casing to pivot inside the cylindrical part of at least one half-casing, the effort sensor having a substantially cylindrical tubular part in which is positioned the shaft of the chainset in dished rotation relative to the pivot axis of the sensor in the casing, the rotation of the sensor in the casing actuating pivoting of a pulley in a plane perpendicular to the pivot axis of the sensor, wherein the articulation of the sensor with a half-casing is effected by means of a rolling bearing such that part of the radial face of the sensor forms the inner ring of the rolling bearing and the inner edge of the half-casing forms a swivelling surface which, in a cross-section passing through the axis of the half-casing, enables swivel movement of the pivot axis of the effort sensor relative to the axis of the half-casing to correct the positioning of the pivot axis of the effort sensor relative to the axis of the half-casing and en-able-enables positioning of the pivot axis of the sensor independently of the axes of the two half-casings to avoid alignment errors between the axes of the two half-casings.