Abstract: An impact rotary tool includes: an impact mechanism that applies stroke impact to an output shaft by an output from a motor; a stroke detector that detects a stroke by the impact mechanism; a controller that stops rotation of the motor based on the detection result by the stroke detector; and a voltage detector that detects a voltage in the stroke detector. The controller determines whether the stroke detector has an abnormality based on the voltage detected by the voltage detector while the motor is not rotating. An informing unit informs a user that an abnormality is occurring when the controller determines an abnormality in the stroke detector.

Abstract: An inner-rotor-type motor is configured such that a projecting portion is formed on an inner circumferential surface of a housing, a recess portion is formed on an outer circumferential surface of a stator, the stator is positioned with respect to the housing by the recess portion and the projecting portion being fitted to each other, the stator is configured by an annular insulator having an attachment surface being brought into close contact with a core end surface at one axial end of a stator core, a sensor substrate is attached to the insulator so as to be capable of detecting a rotation angle of a rotor, the recess portion of the stator is configured by a cutout portion being formed in an area that is a part of an outer circumferential surface of the insulator and includes a portion that is brought into close contact with the core end surface.

Abstract: An inner-rotor-type motor is configured such that a projecting portion is formed on an inner circumferential surface of a housing, a recess portion is formed on an outer circumferential surface of a stator, the stator is positioned with respect to the housing by the recess portion and the projecting portion being fitted to each other, the stator is configured by an annular insulator having an attachment surface being brought into close contact with a core end surface at one axial end of a stator core, a sensor substrate is attached to the insulator so as to be capable of detecting a rotation angle of a rotor, the recess portion of the stator is configured by a cutout portion being formed in an area that is a part of an outer circumferential surface of the insulator and includes a portion that is brought into close contact with the core end surface.

Abstract: An impact rotary tool includes: an impact mechanism that applies stroke impact to an output shaft by an output from a motor; a stroke detector that detects a stroke by the impact mechanism; a controller that stops rotation of the motor based on the detection result by the stroke detector; and a voltage detector that detects a voltage in the stroke detector. The controller determines whether the stroke detector has an abnormality based on the voltage detected by the voltage detector while the motor is not rotating. An informing unit informs a user that an abnormality is occurring when the controller determines an abnormality in the stroke detector.

Abstract: A rotary impact tool includes a spindle that has a rotary axis. An anvil is arranged coaxially with the rotary axis in front of the spindle. A main hammer is directly or indirectly coupled to the spindle. The main hammer is rotatable about the rotary axis and movable in the axial direction, and the main hammer is configured to engage and strike the anvil to rotate the anvil. A sub-hammer accommodates at least a portion of the main hammer and at least a portion of the spindle. The sub-hammer rotates integrally with the main hammer. A brushless motor rotates the spindle.