The invention relates to an impact machine (700) which is adapted to perform a hammering operation on a surface or an object to be worked upon. In particular, a vibration reduction arrangement (740) is attached to the housing (705) and comprises a moveable counterweight, interacting with a motion reversing arrangement having a non-linear spring characteristics, such that the motion of the counterweight can be brought into a counter-acting movement in relation to the vibrations in the housing (705) of the hammering element (710), thus substantially reducing the vibrations. A spring action arrangement is arranged inside the counter weight, the counter weight is movable a first distance without actuating the spring action arrangement, and the counterweight comprises a displaceable projecting member for actuating the spring action arrangement.