Drilling and/or chiselling tool

Details Drilling and/or chiselling tool Drilling and/or chiselling tool

E - Fixed Constructions

21

B

E21B 10/52 (2006.01) B25D 17/08 (2006.01)

Patent

CA 2323568

A drilling and/or chiselling tool comprises a shaft and a cylindrical insertion end connected with the shaft, with at least one elongated recess, open toward the outer surface of and toward the free end of the insertion end . A collar is disposed between the shaft and the insertion end and extends at least partially around the tool and projects at least radially outwardly of the shaft and of the insertion end. The cylindrical insertion end has a diameter not less than 18 mm and preferably larger than 22 mm. The at least one recess has a cross-sectional area, extending perpendicularly to the axis of the tool, and expands toward the outer surface and is provided essentially in the form of an arc of a circle. A tool chuck of a drilling and/or chiselling device, matched to the insertion end, is provided to receive the insertion end of the tool.

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