When the power is switched on, the drilling part rotates, and the hammering part rapidly moves up and down to produce a hammering action. The main reasons, in which the punch is not hammer and drill, are: Bosch 650w Sds Hammer Drill 240v When the hammering force is applied, the drill bit can crush the material into small parts. How does a bosch hammer drill work . Hammer drills are different from other drills because they. When set in the hammer mode, the bit will not only rotate, but hammer blows are applied at the end of the drill axis that will make the bit move back and forth to get through the material. Technically speaking, they pulverize the hard concrete. Consider the options, in which the punch does not hollow, but drills Hammer drill works when it hammers the drill bit which is rotating. Compared to a traditional drill, a hammer drill is much more powerful and is often used to drill through concrete, brick, and some tile. It includes a quick change chuck...