A device (100) for placing a seal (J) on a mounting (S) including a vibration generator (10), that includes: a main body (11); a distal portion (12), movable relative to the main body, onto which a cap (13) having a contact surface (13a) for engaging with the seal is attached; and drive elements (14), configured to drive the distal portion in reciprocal translation relative to the main body, such as to place the seal on the mounting when the contact surface (13a) of the cap (13) engages with the seal (J) that is placed on the mounting (S). The device includes: a grasping handle (20), connected to the main body; and resilient connection elements (30a, 30b) that are located between the main body and the grasping handle and are configured such as to limit the propagation, in the grasping handle, of the vibrations generated by the reciprocal translation movement.

A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The piston guiding element includes a braking recess at its rear end. The element further includes at least one bearing sleeve, which is provided with two axially successive slide bearing sections. Hydraulic fluid is conveyed between the slide bearing sections via a feed system.

A striking mechanism device for a hand-held power tool has at least one hammer tube, in particular made of sheet metal. The hammer tube is provided to guide a hammer and/or a drive piston. The hammer tube is seam-freely longitudinally slit over at least substantially the entire longitudinal extent of the hammer tube.

Tool fitting device for a power tool, in particular a chipping hammer, includinga holding device for receiving and holding a tool shank, a retention element extending at least around a section or sections of the holding device, and a dust protection device for preventing the penetration of dust into the tool fitting device. The dust protection device includes at least one first dust stripping element, at least one fixing bead, and at least one sealing lip element, wherein the sealing lip element is positioned in front of the retention element in the axial direction. Dust protection device for use in a tool fitting device.

Electric hand-held power tool, in particular a hammer drill and/or rotary hammer, having a function setting tube, which can be actuated via a manual function selector switch to bring about various operating modes, a guide tube equipped with a tool fitting, and having a ball-type latching clutch for transmitting a rotary movement from the function setting tube to the guide tube, wherein the ball-type latching clutch has a radial aperture formed in the function setting tube, a main latching depression formed in the guide tube, a coupling ball mounted in the radial aperture and intended to engage in the main latching depression, and a spring-loaded cone ring against whose actuating force the coupling ball can deflect in the radial direction, wherein the guide tube has formed therein an auxiliary depression that is different from the main latching depression and whose opening angle is larger than an opening angle of the main latching depression.