Resin molded stators

A resin molded stator comprising a stator core and coils as major constituents at least parts of which are molded into one piece by a molding material, said molding material comprising

• (a) a low-shrink unsaturated polyester resin,
• (b) a filler material consisting of particulate filler having a particle size of 44.mu. or less, and
• (c) a fibrous material consisting of fibers having a length of 3 mm or less,
• in proportions of 15 to 40% by weight of the component (a) and 60 to 85% by weight of a total of the components (b) and (c), and a weight ratio of the component (b) to the component (c) being 3 to 30/1;
• all of any filler material contained in the molding material consisting of component (b).