spacing on both sides of these partial ring segments 9 there is still space within the center part 1 for one partial ring segment 9 respectively these additional ring segments 9 extend perpendicularly to the partial ring segments 9 positioned at half the width of the center part 1 respectively in this embodiment approximately all partial ring segments 9 are arranged relative to the stamping direction 8 such that their grooves 5 extend substantially in the stamping direction 8 as has been explained in connection with the partial ring segments 4 4 u2032 they can be positioned differently relative to the rolling direction of the sheet metal strip depending on the application in the embodiments still to be described the partial ring segments can also be positioned at any desired angle relative to the rolling direction of the sheet metal strip 0036 fig4 shows the possibility to form the inner as well as the outer rings 2 3 as full continuous or integral rings in this embodiment partial ring segments 4 or 9 can be produced in the center part 1 and inner and or outer rings can be formed thereof in the illustrated embodiment these partial ring segments are arranged in the same way in the center part 1 as in the embodiment according to fig2 of course in this case it is also possible to arrange the partial ring segments in the center part 1 according to the embodiment of fig3 or according to fig5 almost all partial ring segments 4 9 are arranged in correspondence to the previous embodiments so as to be aligned in the stamping direction 8 so that their poles are arranged in the preferred direction of magnetization and correspondingly a.