Balanced axle boring grab of S195, its characterized in that: anchor clamps bodily form form if there is a strengthening rib on " perpendicular to " the style of calligraphy and the left side, adjusting screw install to go up in the anchor clamps bodies and just lock through lock nut, V type piece install in press from both sides specific right flank and can cross in hexagonal fastening screw fix a positioning action, the balanced axle of S195 install on V type piece, the clamp bolt install in pressing from both sides specific middle part nut hole, the spring mounting on the clamp bolt and moving press plate the left side, moving press plate in the middle of be the groove of waist style of calligraphy, install on the clamp bolt, spring shim and clamping nut install in the right of clamp bolt, the bushing plate pass through locating pin and interior hexagonal fastening screw and install in anchor clamps body upper portion, fixed drill bushing install on the bushing plate and for interference fit.