Abstract: Testing apparatus for simulating the behavior of contact moving under normal force loading in machine components with at least two test objects and at least one first test object performs a rolling movement with or without a superimposed sliding movement on a second test object, in which at least the first test object can be driven by means of an eccentric arrangement, the latter including a first short crank receiving at a substantially constant speed about a first spindle, as well as a second short crank, which is articulated to the first crank on a second spindle at a distance from the first spindle, together with a third long crank, which is articulated to the second crank on a third spindle at a distance from the second spindle and is provided with a spatially fixed spindle at a distance from the third spindle and the fixed spindle is connected in non-rotary manner with spindles of the test object.