TDG60 Line Boring is mainly used in processing inner hole,Website:http://www.dthmachines.com, concentric holes with ... parts, such as boring,flange facing, drilling, expanding hole, blind hole boring,etc.Drive option:Electric motorHydraulic motorFacing head:Model 1 ... is recommended for engineeringboring, and double arm is recommended for big hole boring One set contains two support, please make clear ...