... method scientific management system 40 years experience The radial drilling machine of Model Z30100×31 is one of the large multipurpose ... ,close tolerance,hydraulic pretransmission with a machine. Drilling diameters of 100mm,and is used to drill, expand, ream, groove, tap the ... well at home and abroad. The Detail Information of the machine Max.Dia.Of holes drilling100mm Distance from center line of ...