The invention relates to a method for fitting a breaking device tool with a bearing, a breaking device and a tool
bushing. The tool of the breaking device is fitted with a bearing with at least one bearing
bushing manufactured of bearing material and arranged in a bearing space. There is a clearance fit between the bearing
bushing and the bearing space, whereby the bearing bushing is insertable into the bearing space by manual force. During the use,
compression stress pulses are given to the tool with a percussion device, whereby stress
waves travel in the tool, which
waves generate on the tool surface a movement in the direction of its perpendicular. This movement is transmitted to the bearing bushing, and it deforms the bearing bushing in the radial direction in such a way that the bearing bushing is pressed against the bearing space.