Brushless motor system for power tools

A power tool comprising a housing and a brushless DC (BLDC) motor disposed within the housing, the motor including a stator assembly and a rotor rotatably arranged inside the stator, the stator assembly comprising:

• a generally-cylindrical lamination stack including a stator ring and a plurality of stator teeth extending radially inwardly from the stator ring towards a center bore, the center bore arranged to receive the rotor therein;
• an end insulator disposed at an and of the lamination stack, the end insulator including a generally-cylindrical outer ring and a plurality of teeth portions extending radially inwardly from the outer ring towards a center of the end insulator, the outer ring and the plurality of teeth portion corresponding to the stator ring and the plurality of stator teeth;
• and
• a plurality of stator windings wound around the plurality of stator teeth and the corresponding plurality of teeth portion of the end insulator;
• wherein each tooth portion includes an outer face having a sloped portion sloped at an angle in the direction of the outer ring of the end insulator to bias the plurality of stator windings towards the outer ring, wherein the sloped portion extends from approximately an inner end of the tooth portion towards the outer ring, and wherein the outer face of the tooth portion further includes flat portions along two longitudinal sides of the sloped portion.