HYDRAULICALLY FIXABLE FLANGE AND ROTARY TOOL

摘要

Disclosed is a hydraulically fixable flange, which is detachable by expansion and contraction of the internal bore employing hydraulic fluid, in which a hydraulic chamber (16) is provided within the flange body (10) and a hole (20c) for supplying hydraulic fluid which is connected to the outside from the hydraulic chamber (16), is also provided together with a valve system (28,30) provided between the hydraulic chamber (16) and the hole (20c) for supplying hydraulic oil so that the system can supply pressurized oil to the hydraulic chamber (16) from outside. Also, there is disclosed a rotary tool (14) provided with the hydraulically fixable flange.