Power tool

An oscillating power tool, comprising:

• a housing;
• an output shaft for installing a working head, the output shaft being installed in the housing and extending out of the housing;
• a transmission mechanism being configured to be installed in the housing and to be connected to the output shaft;
• and
• a motor being installed in the housing, and the motor comprising:
• a stator;
• a rotor, rotatable relative to the stator;
• and an armature shaft being fixedly connected to the rotor, and wherein the armature shaft is connected to the transmission mechanism, and the transmission mechanism converts rotation of the armature shaft into reciprocation of the output shaft around an axis per se, wherein a no-load rotation speed of the motor is greater than 20000 revolutions/minute, and a ratio of output power of the motor to a volume of the motor is greater than 2 W/cm3.