Patent ID: 6543558
Filing Date: 2003-04-08
Classification: B25D

Abstract:
A drilling and/or chiseling tool has an axially extending shaft (2), said shaft having a cylindrical insertion end (4) with an outer axially extending surface having at least one axially elongated recess (5 to 8) open toward the outer surface of and toward a free end (9) of the insertion end (4) and forming a rotationally locking groove, and a collar (3) is disposed between the shaft (2) and the insertion end (4) and extends at least partially around the tool (1) and projects at least outwardly from the shaft (2) and the insertion end (4), said insertion end has a diameter (d) of at least 18 mm, and said recess (5 to 8) has a cross-sectional area, extending perpendicularly to the axis of said shaft (2) and expanding toward the outer surface and is formed essentially in the form of an arc of a circle and is arranged to receive similarly shaped means for transferring torque to said recess in said tool, said insertion end (4) has four recesses (5, 6, 7, 8), which are arranged at the same angular distance from one another around the circumference of said insertion end (4), and said recesses (5 to 8) each have a length (l), in the range of about 2 times to about 4 times the diameter (d) of said insertion end (4).