How to buy a home or hammer drill
The impact is not called electric hammer, electric drill, drill hole wall cannot. So do not fit your requirements. Hammer size can be changed regardless of the power of the same specifications make hole drill, but the power is too small, will cause the hammer damage. Two bit, 1 bit wing, can be used to hit the wall and if the size is too large, the optional.2 reamer wing drill used to drill, wood and metal. The first general air conditioning eye wall drill and reamer, such as long engaged in the work, we should choose a diamond. One is eye would be neat two is the workload is small, but it is not good control. Non professional personnel with diamond tend to hurt yourself or cause damage to tools. Hammer professional electric tool store to buy. If the household, the proposed purchase ulite brand of 200 watts of power. The price is right, good quality, easy to buy accessories. The price should be 1000 yuan!
Take indoor for example, the ceiling is reinforced concrete, with impact drill is very laborious. Hammer: use it in drilling cement and brick and stone and other hard objects. At work, the drill is subjected to two movements, one is the axial impact vibration, and the other is the slow rotation of the bit. It's easy to drill through thick concrete. You can see from the above, only if there is a porcelain plate and brick wall play a few holes, you can buy a percussion drill.
Electric hammer drill and impact electric drill difference in use: drill (drill): drill and drill drilling wood, iron brick, but can not drill concrete, some impact drill that can be drilled concrete, actually is not feasible, but the tiles and bricks that drill out a very thin layer of cement is no problem.
