Electric actuator

An electric actuator, comprising:

• a motor, having a motor shaft that rotates about a central axis, a rotor body fixed to the motor shaft, and a stator that faces the rotor body in a radial direction via a gap;
• a speed reduction mechanism connected to a portion on one side in an axial direction of the motor shaft;
• an output shaft extending in the axial direction of the motor shaft on one side in the axial direction of the motor shaft, to which rotation of the motor shaft is transmitted via the speed reduction mechanism;
• a first case accommodating the motor and having a first opening part open on one side in the axial direction;
• a second case located on one side in the axial direction of the first case and having a second opening part open on the other side in the axial direction;
• a bearing holder fixed to the first case;
• a first bearing held by the bearing holder and rotatably supporting a portion of the motor shaft that is closer to the other side in the axial direction than the rotor body;
• and
• a second bearing supporting a portion of the motor shaft that is closer to one side in the axial direction than the rotor body so that it is rotatable relative to the second case,
• wherein
• the first case and the second case are fixed to each other with the first opening part and the second opening part facing each other in the axial direction;
• the first case has a wall part covering the other side in the axial direction of the stator;
• the wall part has a through hole penetrating the wall part in the axial direction;
• the bearing holder has
• a holder cylindrical part having a cylindrical shape, holding the first bearing and inserted into the through hole;
• and
• a holder flange part extending radially outward from the holder cylindrical part,
• wherein
• the holder flange part is fixed to the wall part;
• an inner diameter of the through hole is larger than an outer diameter of the holder cylindrical part;
• and
• at least a part of a radially outer surface of the holder cylindrical part in a circumferential direction is located in a position radially inside and away from a radially inner surface of the through hole.