20MM ROTARY HAMMER SDS+1.7J - PLH 20

They are completely different ; impact drivers provide torsional (rotational) impulses which act to drive the fastener clockwise as the screw advances into the material, percussion (hammer drill) provides linear impulses along the axis of the bit that act to micro-shatter the substrate (typically masonry) being drilled . A hammer drill works at a lower stroke rate, but with significantly greater impact energy than a percussion drill. This enables work to be completed more quickly. Hammer drilling in concrete requires less force than percussion drilling. An impact drill uses lateral percussion (from the side, in a circular motion). Once the drill senses that torque is needed , the drill uses impact to twist the screw into the surface. In short, an impact drill is used for driving screws and bolts that require a higher torque. Impact drivers produce lots of rotational force, capable of driving the largest wood screws in seconds. Internal mechanisms allow impact drivers to produce more torque than drills, and in quick bursts. These bursts or “impacts” happen up to 50 times a second, giving impact drivers their name. Can you use an impact driver to drill into concrete? If you drill holes that are less than 1/4 inch, an impact driver can help drill through concrete and brick. These tools have a massive amount of torque. However, they are not built to be used like hammer or regular drills. Percussion drilling is the perfect choice if you need to execute drilling in hard soils. Hard soil has layers of rubble or stones and percussion drilling can effectively drill through it. It is suitable for research on soil pollution, grain size distribution, general soil classification, and profile description. Percussion drilling is a drilling method in which a heavy hammering or cutting bit is attached to a cable and inserted into the borehole. The heavy bit or hammer is repeatedly lifted and dropped, thus boring through the earth. The hammer is made of hardened steel with carbide on the chisel -shaped bit.