EXPANED TYPE BIT ANCHOR

摘要

PURPOSE: A reaming bit anchor is provided to facilitate the rotation of a reaming bit by the injection of punching water from without and enable an operator to check the reaming of a punched hole from the outside by the discharge of punching water with slime to the outside. CONSTITUTION: A reaming bit anchor(100) comprises a body(10), a support plate(20), a support, and a reaming bit(70). The support plate is coupled on the upper end of the body. The support is installed inside the body. The support is formed of a bit fixture(30), a guide bar(40), and a valve(50). The reaming bit is installed in the bit fixture to be rotated.