Motor, fan, and ventilation fan

A motor comprising:

• a rotary shaft;
• a rotor fixed to the rotary shaft;
• a stator comprising a stator core surrounding the rotor in a radial direction about a center axis of the rotary shaft, and a coil wound on the stator core;
• a bearing having an inner ring and an outer ring, the inner ring being in contact with the rotary shaft;
• and
• a conducting member electrically connecting the stator core to the outer ring and being grounded,
• wherein the rotor comprises:
• a facing portion formed of a bond magnet and facing the stator core in the radial direction;
• and
• an insulating joining portion joining the facing portion and the rotary shaft, and
• wherein a length L1 of the facing portion in an axial direction of the rotary shaft is equal to or shorter than a length L2 of the stator core in the axial direction.