... rotary drilling rig can equipped with 400mm, 500mm, 600mm and 800 diameter drilling head with max. drilling depth 26M Main specification for YTZ26 CFA Rotary Drilling rig,max. drilling ... depth 26M YTZ30YTZ26YTZ20Drilling diameter (mm)400,500,600,800400,500,600,800400,500,600,800Max. drilling ...