... drilling machine, Hydraulic system,used to clamp and release the workpiece, keep enough clamping force plate drilling machineThe machine ... is mainly composed of bed(worktable), gantry, vertical ram-type drilling spindle, hydraulic system ... thickness of workpiece(mm) 80/200 80/300 Drilling spindleMax. drilling dia. (mm) Φ50Rotation speed of spindle(r ...