Short drill rod is a tool for adjusting drilling tool spaced length to reach a certain technical purpose in drilling engineering. According to the shape of the shoulder, the structure include sloping shoulder and straight shoulder.Type O.D.(in) Connecton Length series(m) Type O.D.(in) Connecton Length series(m) DZ60 2 3/8 NC26 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ114 4 1/2 NC50 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ73 2 7/8 NC31 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ127 5 NC50 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ89 3 1/2 NC31 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ140 5 1/2 5 1/2FH 1¡¢1.5¡¢2¡¢2.5¡¢3 DZ102 4 NC46 1¡¢1.5¡¢2¡¢2.5¡¢3
