The impact mechanism of the impact drill has two types: dog-shaped and ball-type. The ball type impact drill consists of a moving plate, a fixed plate, and a steel ball. The moving plate is connected to the main shaft by threads and has 12 steel balls. The fixed plate is fixed on the casing by pins and has 4 steel balls. Under the action of the thrust, 12 steel balls roll along 4 steel balls. The cemented carbide drill bit produces a rotary impact motion and can drill holes in brittle materials such as bricks, blocks, and concrete. The overhead nail is removed, so that the fixed disk rotates together with the moving plate, and no impact is generated, and it can be used for ordinary electric drill.
Impact drills rely on rotation and shock to work. A single impact is very slight, but a shock frequency of more than 40,000 per minute produces a continuous force. Can be used for natural stone or concrete. There are adjustment knobs at the drill chuck when the impact drill is working, and the ordinary hand drill and the impact drill can be adjusted. However, the impact drill uses the gears on the inner shaft to jump against each other to achieve the impact effect, and the impact force is far less than the electric hammer. It is not suitable for drilling reinforced concrete.
