Undercutting boring tool with stepped control for heavy duty anchor

摘要

The undercutting boring tool comprises a shaft part (1) enclosed in a shaft sleeve (2) on the front of which is a holder (9) having laterally situated interchangeable boring cutters (10). A guide body (4), having a perpendicular shaft screw (7), is held radially rotatable in the holder which is axially slidable with a slot formed recess (5). The boring cutters rotate about the sleeve's circumference via a left wound, right wound or grooved bore head seal (27). The seal is made of thin cylindrical cross-section (30) and is able to slide via a conical (11) and cylindrical (12) formed screw part (14) until a stop band (15).