Abstract: A coil shaper for coils of rotating electric machines such as motors and generators spreads so-called diamond coils from a coil loop blank with grippers for the corners of the coil and a powered mechanism moving the grippers apart from an initial position for insertion of the elongated loop blank to a final position in which the coil is shaped and the grippers rotated so as to angle the straight, parallel, slot-fitting sections about their lengthwise directions, and comprising also endwise disposed grippers for controlling the knuckles of the coil. The shaper effects automatically the proper shaping of the overhangs of the coil, dispensing with the malletting operations conventionally required in coil making.