Una broca de perforacion para herramientas de perforacion de roca por percusion, un cabezal de la broca de perforacion teniendo una superficie frontal, que tiene una superficie plana definiendo un extremo mas adelante del cabezal de la broca de perforacion, al menos un agujero en el cabezal de la broca de perforacion para recibir un boton.

摘要

A drill bit (21) for percussive rock drilling tools is provided and includes a drill bit head (23) having a front surface (25) having a face surface (27) defining a forward-most end of the drill bit head (23), at least one hole (29) in the drill bit head (23) for receiving a button (31). The drill bit (21) comprises at least one recess (33) in the face surface (27). The recess (33) is larger than the hole (29). The hole (29) is disposed in the recess (33) so that an open end (35) of the hole (29) is disposed below the face surface (27).