A steady rest for supporting a, particularly elongate, workpiece undergoing mechanical work and particularly machining, having: a steady rest main part that can be arranged in a device for machining a workpiece being machined, and at least one support arrangement which is disposed or designed on said steady rest main part and configured to support a workpiece being machined, and comprises at least one support element that supports a workpiece requiring support, wherein said at least one support arrangement is disposed or designed to be mounted on the steady rest main part such that it can move, relative to said steady rest main part, in at least one degree of freedom of movement which defines a path of movement.

A supporting device for supporting an, in particular elongate, workpiece that is to be mechanically processed, in particular machined. The supporting device includes a main body that can be arranged in a device for mechanical machining of a workpiece that is to be mechanically machined, at least one support that is arranged or formed on the main body and is intended for supporting a workpiece that is to be mechanically machined. The support includes at least one support element that supports a workpiece that is to be supported. The at least one support is arranged or formed on the main body so as to be movable, relative to the main body, in at least one degree of freedom of movement that defines a movement path.

A pressing tool for plastically deforming a workpiece is described. The pressing tool includes a housing and an electric motor for actuating the pressing tool. The pressing tool also includes an instrument seat which is adapted to receive an interchangeable instrument head at the housing. The pressing tool also includes a mechanical safety element which is arranged in a manner that is movable from an open position, in which an instrument head may be inserted into the instrument seat, into a closed position, in which the instrument head is locked in the instrument seat. The pressing tool additionally includes a mechanical actuating element which may interact with the safety element in order to be able to cause the pressing tool to be enabled for a pressing process.