Screw rods for pile drivers with improved drilling verticality

摘要

PURPOSE: A screw rod for a pile driver with improved vertical drilling is provided to extend the service life of a screw rod and improve vertical drilling performance by suppressing the gap or slack. CONSTITUTION: A screw rod for a pile driver with improved vertical drilling is constituted as follows. A protrusion type inserting part(11) is formed on one side and an inserted groove is formed on the other side. A spiral member(13) is formed on the outside of the body. A key(20) is projected from one end of the body. A key groove(21) is formed on the other end of the body.