FIELD: electric machining. SUBSTANCE: tool electrode 1 comprises central channel 2 for pumping service fluid and has an outlet through longitudinal side slot 3. Free end of flexible sealing member 4 installed on external surface of tool electrode is installed in a spaced relation to edge of slot 3. Member 4 has the form of cylindrical surface incompletely enveloping the external working surface of tool electrode. Free end of member 4 is bent off by service fluid flowing out of slot 3 and directs the flow of said fluid into working zone. EFFECT: improved design. 3 dwg
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