HIGH LOAD CAPACITY FRICTION FILE

摘要

A high load capacity friction file is provided to reduce the number of files to be driven in order to maintain constant load capacity and shorten the construction period. A high load capacity friction file comprises a file body(10) and a plurality of arms(20). The arm(20) comprises a cylinder(21), a piston(22), a rod(23), a protrusion(24), a hydraulic connection member(25) and a high pressure hose(26). The cylinder(21) has a pore for movement of the piston(22) and a flange at one end thereof. The piston(22) moves along the inner wall of the cylinder(21). The rod(23) is connected to the piston(22). The hydraulic connection member(25) is connected to the inlet of a water pipe of the flange of the cylinder(21). The high pressure hose(26) is connected to the hydraulic connection member(25) and exposed to the outer side of the file body(10) along the inner space of the file body(10).