... (4 5/8”),120mm(4 3/4”),127mm(5”)133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/8 ... ”),149.2mm(5 7/8”) ... /2”)190.5mm(7 1/2”),193.6mm(7 5/8”),200.0mm(7 7/8”)215.9mm(8 ... ”),250.8mm(9 7/8”)269.8mm(10 5/8”),295.3mm(11 5/8”)311.1mm(12 1/4”),346. ... 0mm (13 5/8”),349.2mm(13 3/4”)374.6mm(14 ... ,622,632,7323 cone rotary rock bit 4 5/8"IADC537G