Rock working tool

Details Rock working tool Rock working tool

E - Fixed Constructions

21

B

255/73

E21B 10/00 (2006.01) E21B 10/10 (2006.01) E21B 10/12 (2006.01) E21B 10/18 (2006.01) G01B 11/02 (2006.01)

Patent

CA 2014765

Abstract: Rock working tool for a tunnel boring machine. The tool comprises a shaft (34) with a central hole (35). A tool part (8,9) is rotatably journalled on the shaft. The tool is cooled through the arrangement of channels (40,41,42) in the tool for conducting cooling liquid from a pressure liquid source (22) to the central hole and via the channel (42) which flushes directly on the tool part (8,9). utl89008

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