Power tool

A power tool comprising:

• a motor;
• a fan configured to be rotated by the motor to generate a cooling air;
• a housing accommodating therein the motor and the fan and defining an air passage for the cooling air;
• an output shaft rotatable by the motor, an end bit being attachable to and detachable from the output shaft;
• and
• a transmission mechanism configured to transmit rotation of the motor to the output shaft;
• and
• a bearing,
• wherein the transmission mechanism comprises an intermediate shaft provided in the housing and supported by the bearing, a first belt transmitting a rotational force of the motor to the intermediate shaft, a second belt transmitting a rotational force of the intermediate shaft to the output shaft, and a rotation member transmitting a rotational force of the second belt to the output shaft, and
• wherein the housing comprises:
• a motor accommodating portion accommodating the motor;
• a first belt accommodating portion accommodating the first belt, the first belt accommodating portion being in communication with the motor accommodating portion;
• a second belt accommodating portion accommodating the second belt, the second belt accommodating portion being in communication with the first belt accommodating portion;
• a communicating space formed at a position outward of the bearing in a radial direction of the bearing, the communicating space being in communication with the first and second belt accommodating portions;
• and
• an airflow passage that directs the cooling air from an intake port, through the motor accommodating portion, the first belt accommodating portion, the communicating space, and the second belt accommodating portion, to an outlet port.