Tool for graffling holes (Machine-translation by Google Translate, not legally binding)

摘要

Tool for graffling holes, characterized by comprising three graffiti rollers (1) freely arranged rotating at the end of two axes-support (2) parallel to each other and fixed at their other end to respective trolleys (3) arranged in the same plane of the body (4) of the tool forming an angle of 120º to each other and radially displaceable, in corresponding guides, by effect of a central cone (5), housed in the said body (4) and associated with a thrust screw (6) ) capable of being rotated, for axial displacement, by means of a steering knob (7), as well as of two opposing springs (8), and said body (4) being provided with arms (9) for turning hand the set. (Machine-translation by Google Translate, not legally binding)