Abstract: Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for controlling a pneumatic percussion mechanism. According to the disclosure, the control unit comprises at least one load estimation device.

Abstract: Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for open-loop and/or closed loop control of a pneumatic percussion mechanism, and at least one operating condition sensor unit. According to the disclosure, the control unit is designed to detect at least one percussion mechanism parameter depending on measurement values of the operating condition sensor unit.

Abstract: A bearing device includes at least one bearing element. The at least one bearing element has at least one bearing running surface and at least one lubricant pocket. The at least one lubricant pocket is configured to lubricate at least a portion of the bearing running surface of the at least one bearing element. A method of producing the at least one bearing element includes forming the at least one lubricant pocket in the at least one bearing element at least partly by a non-cutting production method.

Abstract: Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for open-loop and/or closed loop control of a pneumatic percussion mechanism, and at least one operating condition sensor unit. According to the disclosure, the control unit is designed to detect at least one percussion mechanism parameter depending on measurement values of the operating condition sensor unit.

Abstract: Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for controlling a pneumatic percussion mechanism. According to the disclosure, the control unit comprises at least one load estimation device.

Abstract: The invention is based on a handle vibration damping device, in particular for hand-held machine tools (12), comprising a handle (14) and a damping unit (16), which has at least one damping means (18). It is proposed that the damping means (18) is formed by a rheological damping means (18).

Abstract: A percussion bolt for a percussion mechanism of a power tool has a bolt element having a contact shoulder, said contact shoulder as seen in circumferential direction having a cross-section which varies.

Abstract: A hand-held power tool hammer mechanism, having a hammer device, can be driven by a piston via a gas volume. The hammer device has at least one decoupling element, which is provided for dimensionally decoupling a main hammer body of the hammer device, and has a coupling between the decoupling element and the main hammer body, which is provided to couple the main hammer body to the decoupling element in an at least largely synchronous fashion during a flight phase of the main hammer body.

Abstract: A hand-held power tool hammer mechanism, having a hammer device (10a-10k), which can be driven by means of a piston (12a-12k) via a gas volume (14a-14k). A hammer mechanism characteristic value (Sa-Sk), which is composed of the maximum hammer device surface dimension (16a-16k), cubed and divided by the hammer device mass (18a-18k), is greater than 200 mm3/g, preferably greater than 220 mm3/g, and particularly preferably greater than 240 mm3/g.

Abstract: A hand machine tool is equipped with a hammer mechanism, which has a hammer (1) that moves axially back and forth in a guide tube (2); a spring mechanism (4) is provided, which exerts a force on the hammer (1) and can set the hammer (1) into a movement toward a tool (3) that can be inserted into the hand machine tool. The hammer mechanism produces a very high individual hammering energy at a relatively low hammering frequency by virtue of the fact that after each impact, the hammer (1) is set into a motion counter to the force of the spring mechanism (4) in order to stress this spring mechanism and after the stressing of the spring mechanism (4), the hammer (1) is abruptly released again so that it flies toward the tool (3).

Abstract: The present invention relates to a method for making a protective coating containing silicon carbide on at least a portion of the surface of a substrate made from a material with a softening temperature that is above the temperature applied to make the protective coating, where silicon is deposited on the portion of the surface of the substrate and where, under vacuum or in an inert atmosphere, the substrate is heated to a temperature above the melting point of silicon, and the silicon is brought to reaction with carbon that is contained in a porous coating. The surface of the object to be coated is initially provided with a porous carbon coating with an open porosity in a range between 40 and 95%, where said porous carbon coating is covered with a uniform coating of silicon, where the ratio in percent of mass (Ma-%) of the applied silicon to that of the carbon in the porous carbon coating is greater than 2.

Abstract: The present invention relates to a method for making a protective coating containing silicon carbide on at least a portion of the surface of a substrate made from a material with a softening temperature that is above the temperature applied to make the protective coating, where silicon is deposited on the portion of the surface of the substrate that is to be provided with a protective coating and where, under vacuum or in an inert atmosphere, the substrate is heated to a temperature above the melting point of silicon, is brought to reaction with carbon that is contained in a porous coating and is thereafter cooled down, wherein to achieve a homogeneous protective coating of silicon carbide and free silicon the part of the surface of the object to be coated is initially provided with a porous carbon coating with an open porosity in a range between 40 and 95%, where said porous carbon coating is covered with a uniform coating of silicon, where the ratio in percent of mass (Ma-%) of the applied silicon to that o