Abstract: This relates to a tool and a method for assembling an electric machine rotor, including a rotor body and magnetic pole elements. The process includes: placing a lower seal on a bearing element; positioning the rotor body and the magnetic pole elements on a support in such a way that they define between them spaces closed on the support side by the lower seal; placing an upper seal on the rotor body and the magnetic pole elements so that it closes the spaces on the side opposite to the support; and injecting a joining material into the spaces, through holes made in at least one of the lower seal and upper seal.

Abstract: A differential reducer for a motor vehicle, including: a differential mechanism including a ring gear; a reduction mechanism including a secondary pinion and a primary pinion; a crankcase including a first half-crankcase and a second half-crankcase, of which an internal transverse wall of each half includes three bearing seats, each internal transverse wall having first means for collecting and directing oil sprayed by the ring gear, which means turn in a first direction of rotation to the bearing seats; wherein each internal wall includes second means for collecting oil which is sprayed substantially transversally through rotation of the ring gear in a second direction of rotation.

Abstract: A differential reducer for a motor vehicle, including: a differential mechanism including a ring gear; a reduction mechanism including a secondary pinion and a primary pinion; a crankcase including a first half-crankcase and a second half-crankcase, of which an internal transverse wall of each half includes three bearing seats, each internal transverse wall having first means for collecting and directing oil sprayed by the ring gear, which means turn in a first direction of rotation to the bearing seats; wherein each internal wall includes second means for collecting oil which is sprayed substantially transversally through rotation of the ring gear in a second direction of rotation.