With electric hammer drills you can perform tasks like drilling tiny holes in plaster and bricks, mixing colors, screw driving, drilling ceramics and the like. Operating a drill in slow speed is ideal when you need a minimum speed and power. Medium speed drilling is preferred for drilling heavy metals, plastics and laminates. Fast speed drilling is ideal when you need maximum power, drilling in wood, light metals such as aluminum, brass and the like. Electro-pneumatic hammer drills have a greater application than vibrational, and with them you can perform more demanding tasks, such as the demolition of concrete and drilling large diameter holes in concrete and bricks. For basic tasks, cordless drill is an excellent choice. They lack the power of electric drills but they are lightweight and easy to use. With this type of drill you can perform the tasks of drilling small diameter holes in wood and metal, and if the model has the option for vibration and pneumatic shock you can perform drilling operations in bricks, plaster and concrete.
Drilling in metal
HSS drills with a sharpened tip are suitable for metals which contain no iron. These are aluminum, copper, brass, zinc, iron and non-alloyed steel. The best drills for stainless steel are the ones made of high-quality steel for high speed operation with a cobalt alloy (HSS-E) or even drills with a layer of titanium. They are more expensive than normal HSS drills, but they allow drilling stainless steel without excessive wasting of the drills.
Drilling in wood
Spiral point drill bits have a long centering tip with two debarkers. They mill wood fibers, and shavings removers that are internal cleanly remove fibers. For large diameter drills, most frequently used are Forstner drill bits, artistic drills, or drills used for holes in chains. For deeper penetration into the wood use Levis drill.
For drilling walls of clinker, brick or concrete it is necessary to use impact drills or rotary drills. If the wall consists of a hollow rock with a porous material, you drill only rotary, therefore without impact. The same goes for porous bricks and walls of plate elements. To work with these materials, masonry drill bits are required. Such a drill bit at the top contains a soldered plate made of hard metal.
One should avoid working with a drill at a slow speed in the long run because that may cause the drill to overheat. If this occurs, cool the drill by allowing a certain period of idle work at full speed. Keep the ventilation hole in the drill clean. It would be desirable to clean the air vent after each operation from collected dust.
When drilling, make sure that the pressure is always applied in a straight line in relation to the drill bit to avoid damage and breaking of the drills.
And finally, do not clean the device with water.