Electric motor

A power tool comprising:

• an output member,
• a brushless, direct current electric motor having a rotor configured to provide torque to the output member, the motor including a stator, the stator including
• a back stator portion;
• a first tooth extending radially inward from the back portion;
• a second tooth extending radially inward from the back portion;
• a first flange extending away from the first tooth;
• a second flange extending away from the second tooth and toward the first flange;
• insulation including
• a back portion covering the back stator portion,
• a first tooth portion covering the first tooth,
• a second tooth portion covering the second tooth,
• a first flange portion covering the first flange, the first flange portion having a first face that is in facing relationship with the back insulation portion, and
• a second flange portion covering the second flange, the second flange portion having a second face that is in facing relationship with the back insulation portion, the first face and the second face together substantially defining a boundary plane, such that a cross-sectional slot area is defined between the back portion, the first tooth portion, the second tooth portion, and the boundary plane;
• a plurality of conductive wires arranged between the first and second teeth, the plurality of conductive wires defining a cross-sectional winding area within the cross-sectional slot area;
• a battery configured to provide power to the motor;
• and
• a motor drive circuit configured to control operation of the motor,
• wherein a ratio of the cross-sectional winding area to the cross-sectional slot area is greater than or equal to 0.45.