Tool for installing so-called press nuts

In a tool for the installation of so-called press nuts, in which the tool has a housing, a draw bar arranged in the housing for axial displacement, one end of said draw bar being operatively connected to a draw mandrel which extends out of the housing through a nose sleeve arranged thereon and in which a protruding end portion of the draw mandrel is provided with a thread for threadable engagement with said press nut, the improvement comprising means for connecting said draw mandrel to said draw bar so that the draw mandrel is axially immovably connected relative to said draw bar but is rotatable relative to said draw bar, a turbine wheel or the like that is journalled in said housing around said draw bar at the end thereof connected to the draw mandrel for rotation in either direction, means for rotating said turbine wheel in either direction and for bringing the turbine wheel into operative engagement with said rotatable draw mandrel to thereby rotate the draw mandrel and bring it into and out of threaded engagement with said press nut.