Drilling method: hydraulic, automatic rotating feed Manual, rapidly feed or return cutter Technical parameter:ModelNameYK114-377YK377-720YK720-1220RemarkPipe diameter (mm)Φ114-377(4-14”)Φ377-720(14-28”)Φ720-1220(28-48”)Pipe out dia.Pressure class (Mpa)5.0 / 10.05.0 / 10.05.0 / 10.0Transmission pressure (Mpa)5-126-146-16Hydraulic pwer packWorking temp.-30 ~ 220 oC-30 ~ 220 oC-30 ~ 180 oC>80oC need ...