Spindle motor, and recording and reproducing apparatus equipped with the same

With a spindle motor 20 , a stator core 8 comprises a plurality of salient pole components 51 that are formed in a radial shape, are wound with a stator coil 9 , and are disposed at a uniform angle except for a non-equiangular pitch portion, an circular outer peripheral yoke 52 formed so as to be continuous with the outer peripheral side of the salient pole components 51 , a cut-out 55 which is formed by cutting out part of the outer peripheral yoke 52 in an approximate sector-shape except in the non-equiangular pitch portion of the salient pole components 51 , and a compensating pole plate 11 which is provided in the cut-out 55 along the ends on the inner peripheral side of the non-equiangular pitch portion where the salient pole components 51 are formed. The spindle motors is disclosed,when a plurality of heads were installed, and the device is made as thin and compact as needed.