Abstract: A portable power tool comprises a housing, a motor with a driving mechanism for a cylindrical tool for sanding, rasping of filing a workpiece, and means for guiding and supporting the power tool on the workpiece surface. The driving mechanism includes means for rotating and oscillating the output shaft and the tool. The oscillating means includes a wobbling swash plate which is fixed to an intermediate shaft at a slant angle thereto, and follower means engaging the wobbling swash plate. When the intermediate shaft and the swash plate rotate, the follower means reciprocates to oscillate the tool along the output shaft axis.

Abstract: A hand-held machine tool for a workpiece, comprising a casing having first and second hollows therein, an electric motor enclosed in said first hollow and having a driving shaft, a driving mechanism accommodated in said second hollow and being drivingly connected to said driving shaft. The driving mechanism includes a driven shaft and means for rotating and oscillating the driven shaft. A tool holder is provided on the driven shaft for holding a tool having a working surface adapted for sanding, rasping or filing a workpiece, a handle is fixedly connected to the casing and includes electric power conducting means and a switch for energizing and deenergizing the electric motor, and a guide and support for mounting attached to the casing.