The hammer action works in the axial direction for percussion drills, too. Here, however, the function is generated by two tooth and notch discs, which come into contact with each other and "slide" on each other. This process transfers hammer actions to the tool chucks, which acts on the material via the drill bit. During percussion drilling, many small hammer actions act in the axial direction of the drill bit. Thanks to the notch discs, a higher stoke rate is generated than with a hammer drill, but the impact energy is lower. To optimise drilling progress, the user can press the cordless percussion drill tightly against the drilling point. But for softer materials/panel materials, von dem Bussche recommends working without using hammer action &#; such as with fibre cement panels, plasterboard, gypsum fibreboard, stone with porous joints (aerated concrete, pumice concrete) and masonry made of perforated brick.
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