... ,118mm(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”)152 ... 1/2”)190.5mm(7 1/2”),193.6mm(7 5/8”),200.0mm(7 7/8”)215.9mm(8 1 ... 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 ... ,532,612,622,632,7323 cone rotary rock bit 4 5/8"IADC537G