Hydraulic pressure handle of a knife

The utility model discloses a hydraulic pressure handle of a knife, including body, collet chuck, the set screw, pin, sealing member, clamping screw, holding screw, steel ball, sealing screw, burnishing ball, hole A, hole B, hole C, cavity D, the burnishing ball carries out the burnishing effect to downthehole wall, improves the roughness of downthehole wall for sealed effect is better, provides higher locking pressure. Body one end is installed in the numerically controlled fraise machine, and the other end is equipped with the cutter male collet chuck of being convenient for, and the clamping screw that screws can make hydraulic oil hold that the chamber reduces, pressure increases, arouse that the collet chuck produces inside shrinkage deformation, the locking cutter, and opposite spin clamping screw can make the oil pressure reduce, and the collet chuck reconversion takes out the cutter.