The utility model provides a motor, this motor has: the static portion that has the stator, and the the central axis who extends from top to bottom is rotatory for static portion just to be contained along the rotating part of the axle of the central axis configuration in order winding by the supporting. Static portion has: with the bearing of axle suspension for rotating, and the base portion that keeps the stator. The rotating part has: the rotor hub portion that is cyclic annular extension around the axle, directly or indirectly be fixed in rotor hub portion and with the magnet that the stator is relative, dispose in the flywheel that leans on the position department of axial upside than rotor hub portion, and thickness compares the sealing that thickness is thin of magnet. The outer peripheral face of rotor hub portion at least some be the metal covering, the reflectivity of metal covering is higher than the reflectivity on the surface of reflectivity and the sealing of the outer peripheral face of flywheel, the metal covering is covered by the sealing.