Power tool

A power tool, comprising:

• a motor including
• a rotor including a rotor shaft, the rotor being rotatable about a motor rotation axis extending along a predetermined axis,
• a fan fixed to a first portion of the rotor shaft in a first direction from a middle of the rotor shaft along the predetermined axis,
• a commutator fixed to a second portion of the rotor shaft in a second direction from the middle of the rotor shaft along the predetermined axis,
• a carbon brush in contact with the commutator, and
• a stator surrounding the rotor, the stator including
• a stator core,
• an insulator fixed to the stator core,
• a rib protruding from the insulator in the second direction, the rib having an end in the second direction located in the second direction from an end of the carbon brush in the first direction, and
• a coil supported by the insulator;
• and
• a housing supporting the stator, the housing including
• a cylinder surrounding the motor,
• a bottom located in the second direction from the commutator and connected to the cylinder, and
• a vent in the bottom.

A power tool, comprising:

• a motor including
• a rotor including a rotor shaft, the rotor being rotatable about a motor rotation axis extending along a predetermined axis,
• a fan fixed to a first portion of the rotor shaft in a first direction from a middle of the rotor shaft along the predetermined axis,
• a commutator fixed to a second portion of the rotor shaft in a second direction from the middle of the rotor shaft along the predetermined axis,
• a stator surrounding the rotor, the stator including
• a stator core,
• an insulator fixed to the stator core, and
• a coil supported by the insulator, and
• a carbon brush in contact with the commutator;
• a housing supporting the stator, the housing including
• a cylinder surrounding the motor,
• a bottom located in the second direction from the commutator and connected to the cylinder, and
• a vent in the bottom;
• a brush holder supported by the cylinder and holding the carbon brush;
• and
• an inner baffle between the insulator and the brush holder along the predetermined axis, the inner baffle having an inner end located inward from an inner end of the insulator in a radial direction of the motor rotating axis,
• wherein a predetermined plane perpendicular to the motor rotation axis includes
• a first reference circle having a diameter being one times an outer diameter of the commutator and centered on the motor rotation axis,
• a second reference circle having a diameter being 1.5 times the outer diameter of the commutator and centered on the motor rotation axis, and
• an annular range between the first reference circle and the second reference circle, and
• S1>S2, where, when a position at which the second reference circle intersects with a reference line passing through the motor rotation axis and a center of the carbon brush in the predetermined plane is a 0° position, S1 is an area of the inner baffle in a first section of the annular range from the 0° position to a 90° position in a counter-rotation direction of the rotor, and S2 is an area of the inner baffle in a second section of the annular range from the 0° position to a 90° position in a forward-rotation direction of the rotor.