A grinder having a motor, wherein the grinder can be connected to a grinding disk. The grinder is configured to enable a wobbling movement, in addition to a grinding movement in a flat plane, of the grinding disk when the grinding disk is connected to the grinder. As a result, the grinder is able to perform a grinding movement, which constitutes a superimposition of a grinding movement in a flat plane and a wobbling movement of the grinding disk. This makes it possible to operate the grinder in two operating modes, the wobbling movement being able to be stopped by an arresting device. method for operating a grinder and a grinding disk for the grinder, the grinding disk having an unbalance for assisting the wobbling movement is also provided.

A grinder having a motor, wherein the grinder can be connected to a grinding disk. The grinder is configured to enable a wobbling movement, in addition to a grinding movement in a flat plane, of the grinding disk when the grinding disk is connected to the grinder. As a result, the grinder is able to perform a grinding movement, which constitutes a superimposition of a grinding movement in a flat plane and a wobbling movement of the grinding disk. This makes it possible to operate the grinder in two operating modes, the wobbling movement being able to be stopped by an arresting device. method for operating a grinder and a grinding disk for the grinder, the grinding disk having an unbalance for assisting the wobbling movement is also provided.

A random orbital sanding tool includes a power motor, a driving spindle connected to the power motor, an eccentric block connected to the driving spindle, a tool holder disposed on the eccentric block, and a sanding pad connected to the tool holder and indirectly driven by the power motor. The random orbital sanding tool includes a friction ring disposed on the tool holder, the friction ring contacts a surface of the eccentric block facing the sanding pad, the friction ring stops rotation of the tool holder and the sanding pad by a friction force exerting on the surface of the eccentric block when the power motor stops operation, the friction ring includes a base part protruding into a gap between the tool holder and the eccentric block, a sleeve part diverged and extended from the base part.

A random orbital sanding tool includes a power motor, a driving spindle connected to the power motor, an eccentric block connected to the driving spindle, a tool holder disposed on the eccentric block, and a sanding pad connected to the tool holder and indirectly driven by the power motor. The random orbital sanding tool includes a friction ring disposed on the tool holder, the friction ring contacts a surface of the eccentric block facing the sanding pad, the friction ring stops rotation of the tool holder and the sanding pad by a friction force exerting on the surface of the eccentric block when the power motor stops operation, the friction ring includes a base part protruding into a gap between the tool holder and the eccentric block, a sleeve part diverged and extended from the base part.

A hand-held power tool includes a housing unit which has at least one handle housing and a drive housing which is coupled to the handle housing, and a central web on a surface of an upper side of the drive housing, and raised relative to the surface.

A hand-held power tool includes a housing unit which has at least one handle housing and a drive housing which is coupled to the handle housing, and a central web on a surface of an upper side of the drive housing, and raised relative to the surface.

An adjustable stroke mechanism has a housing with a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. A mounting assembly is disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly is variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

An adjustable stroke mechanism has a housing with a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. A mounting assembly is disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly is variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

A power tool that includes a tool body housing, a drive system, a tool head and a connection system. The drive system is housed in the tool body housing. The tool head, which is configured to perform work on a work piece, includes a tool head housing and an input member that is driven by the drive system when the tool head is coupled to the tool body housing. The tool head can be engaged to the tool body housing in at least two pre-defined and distinct orientations. The connection system secures the tool head to the tool body housing in each of the at least two pre-defined and distinct orientations.

A power tool that includes a tool body housing, a drive system, a tool head and a connection system. The drive system is housed in the tool body housing. The tool head, which is configured to perform work on a work piece, includes a tool head housing and an input member that is driven by the drive system when the tool head is coupled to the tool body housing. The tool head can be engaged to the tool body housing in at least two pre-defined and distinct orientations. The connection system secures the tool head to the tool body housing in each of the at least two pre-defined and distinct orientations.