Patent ID: 8151679

Claim:
A device, comprising: a centering element; a spring element; a fastening screw; a bearing flange with a circular bearing face; and at least one form-locking element for fastening an axially mountable tool to a drive shaft of a hand-held power tool comprising a chamfer; wherein said tool is drivable in an oscillating fashion, wherein said centering element is provided for centering said tool relative to said drive shaft, wherein said form-locking element is provided for defining a rotary position of said tool relative to said drive shaft, wherein said form-locking element is located radially outside said centering element, wherein more than eight form-locking elements, each of which form-locking elements including a chamfer, are arranged, wherein a radius associated with one position of said form-locking elements is four times as large as a radius of said centering element, wherein said form-locking elements are located on said bearing flange, wherein said form-locking elements are distributed uniformly over an angular range that is defined by the entire circumference of said circular bearing face of said bearing flange, wherein said form-locking elements have a trapezoidal cross section, which is perpendicular to an axis of the drive shaft ( 16 ), wherein said fastening screw is provided with said spring element acting as a contact-pressure flange, and wherein in a mounted state the spring element automatically deflects said tool past each chamfer of each of said more than eight form-locking elements into a rotary position in which said tool can be fixed by tightening said fastening screw.