Shank for a rotary/percussion working tool

Details Shank for a rotary/percussion working tool Shank for a rotary/percussion working tool

B - Operations, Transporting

25

D

B25D 17/08 (2006.01) B23B 31/00 (2006.01) B23C 5/10 (2006.01) B25D 15/00 (2006.01) B25D 16/00 (2006.01) B28D 1/14 (2006.01) B28D 1/26 (2006.01)

Patent

CA 2476986

A shank for a working tool has at least three recesses (5) provided within the lockable region (3) and arranged in a cross-section IgIc) to the tool axis (A) at least at angles of 0°, 120°, and 240° within the radial reference dimension (R) of the shank, with at least one of the recesses (5) being axially closed toward a free end of the shank (1), and at least one protrusion (6) arranged circumferentially between two adjacent recesses (5) outside of the radial reference dimension, with the sum of central recess angles (.alpha.) of the recesses amounting to at least 150°, and a central protrusion angle (.beta.) of the at least one protrusion (6) being smaller than a central recess angle (.alpha.).

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