Motor and disk drive apparatus

A motor, comprising:

• a bearing;
• a rotary unit connected to the bearing and configured to rotate about a center axis;
• a stator including a stator core and at least one coil wound around the stator core;
• a thin flat base member;
• and
• a cylindrical holder extending in an axial direction;
• wherein
• the base member includes a first through-hole extending in the axial direction, a peripheral edge portion extending radially outward from the first through-hole, and a thin portion located radially outward of the peripheral edge portion and having an axial thickness smaller than an axial thickness of all other portions of the base member the peripheral edge portion;
• the holder is located in the first through-hole;
• the holder includes a first protrusion portion extending radially outward and located axially above the peripheral edge portion and a second protrusion portion extending radially outward and located axially below the peripheral edge portion;
• the second protrusion portion is located axially above a portion of a lower surface of the base member;
• the second protrusion portion is located axially below a lower surface of the thin portion and axially below a lower end surface of the holder;
• the bearing is located inside the holder;
• the stator core is located outside the holder and axially above the thin portion such that a portion of the thin portion is located directly axially below the stator core;
• and
• the second protrusion portion extends in a radial direction, or is deformed in a radial direction, to cover or overlap a lower surface of the peripheral edge portion.