Winding group for a multilayer semifinished product, particularly for a rubber cord comprising a textile or metal substrate coated on one or both faces with an elastomer, comprising: a winding station; a carriage positionable in the winding station, in a position for receiving the semifinished product, the carriage also being insertable/extractable laterally in/from said winding station; a driving unit which is associable with the carriage and is slidable through said winding station in a lateral insertion and/or extraction direction of the carriage; wherein the carriage comprises a first reel with a horizontal axis for winding the semifinished product and a second reel having a horizontal axis parallel to the axis of the first reel, said second reel being for a coil of a film or service fabric to be wound together with the semifinished product, characterized in that the driving unit comprises a first motor with two power drives (151, 152) located on opposite sides (A, B) of the driving unit and engageable with said first reel of the carriage; said carriage first reel comprises two joints (81, 82) which are placed on opposite sides of the carriage and can both engage one or the other power drive of said first motor, said driving unit thus being able to drive the winding reel of the carriage regardless of placing the carriage on one side or on the other side of the driving unit; the driving unit comprises a second motor with two power drives (161, 162) located on opposite sides (A, B) of the driving unit and engageable with the second reel of the carriage; said second reel comprises two joints (91, 92) on opposite sides of the carriage; the joints (91, 92) of the second reel both being engageable in one or the other of said two power drives (161, 162), the driving unit thus being able to drive both the first reel and the second reel regardless of placing the carriage on one side or on the other side of the driving unit. a winding station; a carriage positionable in the winding station, in a position for receiving the semifinished product, the carriage also being insertable/extractable laterally in/from said winding station; a driving unit which is associable with the carriage and is slidable through said winding station in a lateral insertion and/or extraction direction of the carriage; wherein the carriage comprises a first reel with a horizontal axis for winding the semifinished product and a second reel having a horizontal axis parallel to the axis of the first reel, said second reel being for a coil of a film or service fabric to be wound together with the semifinished product, characterized in that the driving unit comprises a first motor with two power drives (151, 152) located on opposite sides (A, B) of the driving unit and engageable with said first reel of the carriage; said carriage first reel comprises two joints (81, 82) which are placed on opposite sides of the carriage and can both engage one or the other power drive of said first motor, said driving unit thus being able to drive the winding reel of the carriage regardless of placing the carriage on one side or on the other side of the driving unit; the driving unit comprises a second motor with two power drives (161, 162) located on opposite sides (A, B) of the driving unit and engageable with the second reel of the carriage; said second reel comprises two joints (91, 92) on opposite sides of the carriage; the joints (91, 92) of the second reel both being engageable in one or the other of said two power drives (161, 162), the driving unit thus being able to drive both the first reel and the second reel regardless of placing the carriage on one side or on the other side of the driving unit.