A power tool includes a housing in which a drive unit is arranged, and a tool holder for the detachable holding of a tool insert. The tool insert is configured to be driven percussively and/or rotationally. A sensor unit is configured to detect at least one movement variable, and electronics are configured to control or regulate the power tool. The electronics have a percussion detection unit configured to determine a percussion mode based on at least one movement variable and/or a rotation detection unit configured to determine a rotation of the housing. The electronics control the drive unit based on the determined percussion mode and/or the determined rotation of the housing. The electronics have at least two parameter sets for the percussion detection unit and/or at least two parameter sets for the rotation detection unit. The electronics are configured to select one of the at least two parameter sets.

A retractable bit holder for a bit-using power tool provides storage for bits within the power tool. The bit holder has a tube that slides along a cylindrical member of the casing of the power tool between open and closed positions. A bit-mounting member extends radially outwardly from the tube and has a plurality of clip members projecting from it, the clip members being configured for removably holding bits. The bit-mounting member has a first portion arranged for holding bits at a greater distance from the tube than a second portion of the bit-mounting member, thereby providing storage of bits having a range of diameters. The bit holder is sized to provide a recess between the bit-mounting member and an internal wall within the casing of the power tool. The bit holder may optionally be contained in a bit cartridge that is detachable from the power tool.

A retractable bit holder for a bit-using power tool provides storage for bits within the power tool. The bit holder has a tube that slides along a cylindrical member of the casing of the power tool between open and closed positions. A bit-mounting member extends radially outwardly from the tube and has a plurality of clip members projecting from it, the clip members being configured for removably holding bits. The bit-mounting member has a first portion arranged for holding bits at a greater distance from the tube than a second portion of the bit-mounting member, thereby providing storage of bits having a range of diameters. The bit holder is sized to provide a recess between the bit-mounting member and an internal wall within the casing of the power tool. The bit holder may optionally be contained in a bit cartridge that is detachable from the power tool.

A hammer drill having an impact mechanism and a rotary drive, wherein the hammer drill is designed to rotate a tool at a speed n about a longitudinal axis of the tool and to drive it with an output impact power PS along the longitudinal axis with a striking movement is disclosed. At a working point, at least one condition is met: 1. The ratio of the output impact power PS to the speed n is at least 3.5 W/rpm; 2. Depending on the output impact power PS, the speed n is at most (PSAN−300)2/2000+150) rpm; 3. In the event of an infinitesimal change in the output impact power PS, the speed n changes by at most 0.1 rpm/W.

A hand-held power tool includes a tool fitting, an impact mechanism, and a rotary drive. The hand-held power tool is configured to rotate a tool held in the tool fitting with a rotational speed about a longitudinal axis of the tool and to drive the tool with an impact movement along the longitudinal axis at an impact frequency f. A ratio of the rotational speed to the impact frequency f at least at a working point of the hand-held power tool is at most 5.0 rpm/Hz or at least at the working point of the hand-held power tool the rotational speed is at most (0.2*(f/Hz-22){circumflex over ( )}2+80) rpm for impact frequencies f in a range from 20 to 60 Hz.

A power tool having a rotary hammer mechanism is configured to produce hammering motion for driving a tool accessory along a driving axis and rotating motion for rotating the tool accessory around the driving axis. The power tool has a tool holder that is configured to removably hold the tool accessory. The tool holder has a rotation transmitting part configured to transmit rotating power to the tool accessory. A layer formed of carbide of a group 5 element of a periodic table is formed on the rotation transmitting part.

A power tool having a rotary hammer mechanism is configured to produce hammering motion for driving a tool accessory along a driving axis and rotating motion for rotating the tool accessory around the driving axis. The power tool has a tool holder that is configured to removably hold the tool accessory. The tool holder has a rotation transmitting part configured to transmit rotating power to the tool accessory. A layer formed of carbide of a group 5 element of a periodic table is formed on the rotation transmitting part.

A dust collecting system includes a power tool and a dust collector. The power tool includes at least one battery-mounting part, a first motor, a driving mechanism and a body housing. The at least one battery-mounting part is each configured to removably receive a battery. The first motor is configured to operate with electric power supplied from the battery. The driving mechanism is configured to drive the tool accessory by power of the first motor. The body housing houses the first motor and the driving mechanism. The dust collecting system includes a control device configured to control operation of at least one of the power tool and the dust collector according to a state of the whole dust collecting system.

Power tools described herein include a housing, a brushless direct current (DC) motor, a non-conductive terminal mount, and a plurality of terminals. The housing has a motor housing portion, a handle portion, and a battery pack interface. The brushless DC motor is located within the motor housing portion and has a rotor and a stator. The non-conductive terminal mount is located on an outer peripheral surface of the stator and includes an angled surface. The angled surface is not substantially parallel to a longitudinal axis of the motor. The plurality of terminals is mounted on the angled surface of the terminal mount. Each of the terminals is angled in a first direction such that the terminals are not substantially parallel to the longitudinal axis of the motor.

Rail hammer assemblies suitable for advancing driving a member into or toward or pulling a member from or away from a workpiece, respectively may include an impact mechanism. The impact mechanism may include an elongated slide rail. A first rail impact plate may be carried by the slide rail. A second rail impact plate may be carried by the slide rail in spaced-apart relationship to the first rail impact plate. At least a first permanent magnet may be carried by the slide rail outside the first rail impact plate. At least a second permanent magnet may be carried by the slide rail outside the second rail impact plate. An impact hammer may be slidably carried by the slide rail between the first rail impact plate and the second rail impact plate. The impact hammer may include at least one electromagnet. A control system may include at least one power source. A first button may interface with the at least one power source and the electromagnet to facilitate travel of the impact hammer in a first direction on the slide rail. A second button may interface with the at least one power source and the electromagnet to facilitate travel of the impact hammer in a second direction on the slide rail. Rail hammer methods are also disclosed.