In the concrete perforated with percussion drill or hammer.
There are two kinds of DC and AC electric hammer, hammer for lithium is not plugged in operation is more suitable for household. Generally flat drill and electric hammer hammer drill two modes. The flat drill mode is similar to the horizontal drilling function pattern of the impact drill. It can be punched on the concrete under hammer drilling mode.
Impact drill with flat drills and impact drills two functions, flat drill mode can install different bits in lightweight materials such as plastic, wood, thin metal surface drilling, this mode can also install a batch head screw, such as assembling furniture, installing door handle, disassembly and so on. The drill bit under impact drilling is used mainly for drilling on lightweight concrete, such as drilling, mounting, hanging, painting, hardware, etc on walls of brick walls or ordinary cement.
The difference between drill and electric hammer:1) the impact of different modes, impact drill is on the two block impact gears impact friction impact hammer, and the impact is the movement of the piston cylinder, so the impact of hammer is much higher than that of ordinary percussion drill.2) tell from the function, the function is relatively more lithium electric hammer, screwdriver, drill, can be set in one hammer.4 shopping suggestions:If it is punched on some softer material, it is recommended to choose impact drill.If you often on the hard wall such as concrete drilling, recommended to choose the hammer.
