... -430 CW-410 CW-420 CW-3500 Crownwell Drilling Rig Model CW-430 CW-410 CW-420 CW-3500 ... CWH600 Electric motorCWH75EP, CWH90EPCWH75EP,CWH90EP, CWH132EP,CWH185EP Model CW-430SpecificationsTypeHydraulic Down-the-hole Drilling RigWorking Pressure (bar)7—20Air Consumption ( ... ,CWH450,CWH600,CWH750,CWHH750Electric motorCWH90EP,CWH132EP,CWH185EP Crownwell Drilling Rig Model CW-430 CW-410 CW-420 CW-3500