Hammer boring machine striking function boring tool

摘要

The boring tool shaft end has a cylindrical striking surface or striking round head (9) or a hole, the effective striking surface of which faces the direction of the borer head lying within a casing circle (6, 7) and is formed by specific diameters (d5). The casing circle (6, 7) is formed by the radially inwardly located contact points (13, 14) with the rotary pick-up grooves (3, 3') or the holding groves (4, 4'). The cylindrical raised formation (9) is formed as striking round head with a cylinder height of approximately 0.5 to 3.0 mm and in particular approximately equal to 1 to 2 mm. The cylindrical striking head (9) has straight, inclined or concavely round side flanks.