Patent ID: 8207647

Claim:
A hand-held power tool, comprising: a housing in which an electric motor of a predetermined frame size is disposed, the motor including: a stator having a lamination stack having pole pieces mated to return path pieces and field coils disposed on the pole pieces; an armature disposed in the stator, the armature having an outside diameter that is at least 0.625 of an outside diameter of the stator; a length of the lamination stack of the stator being at least ten percent shorter than a length of a lamination stack of a stator of a needle wound motor of the same frame size wherein the lamination stack of the stator of the needle wound motor includes a plurality of individual of laminations stacked together wherein each of the laminations includes slots in which magnet wires are wound to wind field coils; and the motor having a maximum power output that is at least the same as a maximum power output of the needle wound motor of the same frame size with the longer lamination stack where both motors have the same maximum no load speed.