Spindle motor

A spindle motor comprising:

• a base member having a stator core fixedly installed thereon;
• a sleeve fixedly installed on the base member;
• a shaft inserted into the sleeve and rotating;
• and
• a rotor hub fixedly installed on the shaft and including a body having a disk shape, a magnet mounting part extended from an edge of the body in a downward axial direction and having a driving magnet installed on an inner surface thereof, and a disk support part extended from the magnet mounting part in an outer radial direction,
• wherein the driving magnet is installed on the magnet mounting part so that a magnetic center thereof is disposed to be higher than that of the stator core in the axial direction in order to generate force directed in the downward axial direction through interaction with the stator core, and
• the magnet mounting part includes a vortex generation suppressing part disposed on a lower edge portion thereof so as to decrease at least one of noise and vibrations generated by a flow of air during rotation of the rotor hub.