Patent ID: 10328567

Abstract:
A power tool motor is provided including a stator assembly and a rotor assembly rotatably disposed within the stator assembly. The stator assembly includes: a generally-cylindrical lamination stack having a stator ring and stator teeth extending radially inwardly towards a center bore arranged to receive the rotor assembly therein; an end insulator disposed at an and of the lamination stack and having an outer ring and teeth portions extending radially inwardly from the outer ring towards a center of the end insulator; and stator windings wound around the stator teeth and the teeth portion of the end insulator. A generally cylindrical seal member is disposed to interface with an end of the stator, which includes a mating surface having indents configured to mate with ends of the stator windings or ends of the teeth portion of the end insulator to substantially seal respective gaps therebetween from entry of workpiece particulate.