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Our thesis deals with the design of a test device that dynamically loads the insert pad at the cutter. The test device consists of a cam, a rocker, a spring pressing the rocker to the surface of the cam and a drum (hammer) that is energized by the rocker's movement and acts as a force on the bed of the cutting insert. The measurement results on this device will be used to determine the Wöhler curve equation. This article describes the cam design. Based on the desired bucket kinematics, the profile of the cam will be designed. In particular, the kinematic and geometric properties of the cam profile will be defined. This leads to a set of three non-linear equations of three unknowns. This system was subsequently reduced to one nonlinear equation by one unknown. Numerically, the simple iteration method, which was programmed in Matlab, defined the cam profile.  Residual for the given angle of rotation of the cam φⁱ, the corresponding cam profile vector wⁱ has been calculated.