The stator frame is ribbed, made of gray cast iron or of welded steel plates. Motor feet are made of grey cast iron and are fastened to the motor frame by high strength screws according to the prescribed tightening torque. Feet of bigger motor are made of steel and welded to the frame of motor. Bearing shields are made of grey cast iron or of welded steel plates.
Motors have one external fan, and motors have two fans (internal and external). Fans are made of siluminum or welded steel plates. Fan cap and fan cover, which can be attached to the vertical motor with free shaft end turned downwards, are made of steel sheet. Stator core is made of high quality steel sheets.
The rotor core is made of high quality steel sheets, and rotor winding of aluminum cast in special casttechnology or of copper. The shaft is cylindrical, without ribs, and made of steel.