... fields, such as mining, marine engineering, shipping, petrol, electric power, etc.Boring bar is made of high-intensity alloy ... expanding hole, blind hole boring,etc.Drive option:Electric motorHydraulic motorFacing head:Model 1:Ø70-300mmModel 2:Ø80-400mmModel 3:Ø260 ... 400mm6Double arm mount kitMax Bore Diameter:600mm7Boring head65-600mm8Facing head assemblyModel 1:Ø70-300mmModel 2:Ø80-400mmModel 3:Ø260 ...