A hand-held machine tool including a drive device by which a tool that can be brought into operative connection with the machine tool can be actuated, with a control device for actuating the drive device and at least one capacitive sensor element (40) operatively connected to the control device being provided. The at least one sensor element (40) has a first element (42) connected to the control device via a line (44) and a second element (43) which is arranged at a distance from and so as to be displaceable relative to the first element (42) and can be actuated by a user.

A power tool is provided including a having a field case portion and a gear case portion, a motor disposed in the field case portion of the housing, a fan rotatably connected to the motor, intake conduits disposed along the housing, and a particle separation assembly in fluid communication with the intake conduits. The particle separation assembly includes a baffle and a centrifugal chamber, where the baffle is operable to direct airflow from the intake conduits into the centrifugal chamber in a cyclonic path, and the centrifugal chamber includes a radial gap forming a particle dispersion port in the cyclonic path of the airflow to eject contamination from the airflow. Additionally or alternatively, the centrifugal chamber includes air-directing fins arranged angularly to direct contamination from the airflow towards the particle dispersion port.

A method is provided for actuating a hand-held machine tool including a drive device, with a control device for actuating the drive device and at least two capacitive sensor elements operatively connected to the control device being provided. The method includes the following method steps of determining an electrical charge of the first and second sensor element comparing the determined first electrical charge with a defined first threshold value and the determined second electrical charge with a defined second threshold value; enabling the actuation of the drive device and/or defined activation of the drive device via the control device when a predefined condition exists between the determined first electrical charge of the first sensor element and the determined detected second electrical charge of the second sensor element. A machine tool for carrying out a method of this kind is also described.

A dust collector in one aspect of the present invention comprises a dust collection portion, a communication portion, and an interlock operation control portion. When the communication portion receives an interlock command transmitted from an electric working machine, the interlock operation control portion makes the dust collection portion operate interlocking with the electric working machine. The interlock operation control portion includes a storage portion, in which identification information specific to the electric working machine with which the dust collection portion is to be made to perform the interlock operation is stored.

The present invention addresses the issue of improving an assembly property. In a grinder, a paddle lever is rotatably connected to a rear housing. In addition, a rotating shaft that is rotatably supported by the rear housing is formed with the paddle lever, and a stopper part for regulating the rotation range of the paddle lever is formed with the rear housing. Furthermore, the rear housing and the paddle lever are each constituted by a single member. Through this, the assembly property of the grinder can be improved.

A hand-held power tool, in particular an angle grinder, includes a gearing housing part and an accessory equipment. The gearing housing part includes at least one machine-side contact element. The accessory equipment includes at least one accessory equipment-side contact element. In the mounted state of the accessory on the hand-held power tool, the at least one machine-side contact element comes into contact with the at least one accessory-side contact element.

One aspect of the present disclosure provides an electric work machine including a motor, a motor driver, an output shaft, a housing, two or more measurement devices, and a control circuit. The housing includes a handle fixed thereto or is configured such that the handle is detachably attached thereto. The two or more measurement devices (i) receive two or more loads from the handle fixed or attached to the housing, and also (ii) measure the two or more loads received. The control circuit adjusts a magnitude of the electric power, based on the two or more loads measured.

An electric working machine comprises a motor, a switch, a drive device, a brake device, and a failure determiner. The switch is configured for operation by a user, has an on-state and an off-state. The drive device is configured to drive the motor in response to the switch being placed in the on-state. The brake device is configured to control deceleration of the motor to a stopped state in response to the switch being placed in the off-state. The failure determiner is configured to monitor deceleration of the motor during controlled deceleration and to determine whether the brake device has failed based on the monitored deceleration.

A disc grinder includes a tool main body that may include, for example, as from the front side, a drive portion, a handle portion, and a battery attachment portion. A rechargeable battery may be attached to the battery attachment portion through sliding. A brushless DC motor rotationally drives a motor shaft by electric power from the rechargeable battery. A reduction gear unit may reduce in speed the rotational drive of the motor shaft and may transmit the rotational drive to an output shaft to which a grinding wheel is mounted. The brushless DC motor and a reduction gear of the reduction gear unit may be arranged such that the rotational axis of the motor shaft and the rotational axis of the output shaft are parallel to each other.

A power tool comprising a housing and a brushless direct-current (BLDC) motor disposed within the housing. The motor includes a stator and a rotor rotatable relative to the stator. The power tool is configured to generate a power output from the motor such that a quotient obtained by the power output measured in Watts (Wout), divided by an input measured in Volt-Amperes (Vain), and further divided by a diameter of the motor measured in meters (m), is greater than 10 Wout/Vain/m.