Tool device for high-speed machine-working

A tool device for high-speed crosscutting a workpiece, comprising:

• a striking unit comprising a striking piston supported and driven by a driving portion of the striking unit;
• a tool housing;
• a damper unit;
• a movable crosscutting tool movably arranged within said tool housing;
• a fixed crosscutting tool fixedly arranged within said tool housing;
• said striking piston arranged to administer a force to the movable crosscutting tool;
• said fixed crosscutting tool arranged to exert a detaining force upon the workpiece;
• and
• said damper unit constructed and arranged to brake the striking motion of said movable crosscutting tool;
• wherein the tool housing has at least two supporting surfaces for positioning said movable crosscutting tool, said supporting surfaces being curved and having a same radius,
• wherein a piston access recess is constructed and arranged between said curved supporting surfaces to provide a space through which said striking piston moves, and
• wherein said movable crosscutting tool has curved edge surfaces in contact with said curved supporting surfaces of said tool housing, said curved edge surfaces having a substantially similar radius as said curved supporting surfaces to assist in alignment of said tool device.