Patent ID: 8640580
Filing Date: 2014-02-04
Classification: B24B,B26D,B27B,Y10T

Abstract:
1. A method for fastening an axially mountable tool to a driven shaft of a hand-held power tool, comprising steps of: attaching said tool with a fastening portion to said drive shaft until said tool is in contact with a bearing shaft that is mounted on said drive shaft, wherein said fastening portion of said tool comprises twelve tool form-locking elements which correspond to twelve flange form-locking elements of said bearing flange; attaching a fastening screw to said drive shaft, wherein said fastening screw comprises a spring element embodied as a cup spring to act as a contact pressure flange; inserting said fastening screw through a round hole located in a center of said tool; screwing said fastening screw into a centering element of said bearing flange; rotating said tool to determine a rotary position relative to said drive shaft, wherein said tool is automatically deflected by a contact pressure generated by said spring element past chamfers of said flange form-locking elements into a rotary position in which said tool can be fixed; and tightening said fastening screw to press said tool via said spring element against a bearing face of said bearing flange, wherein said spring element generates a clamping force to fixedly mount said tool to said drive shaft.