Technical Specifications Drilling capacity6 1/2" dia holes upto 300mtrs by DTH method. 12 1/2" dia holes upto 300 mtrs by Rotary method. 16" dia holes upto 100 mtrs by Rotary method. NQ hole upto a depth of 150 mtrs by Core Drilling. Mud Pump Capacity 1021 LPM @15.43 kg/cm