What are the classifications of electric drills?
Electric drills can be divided into three categories: hand drills, impact drills, and hammer drills.
1. Hand drill: The power is the smallest, the scope of use is limited to drilling wood and as an electric screwdriver. Some hand drills can be changed into special tools according to the purpose, and the use and models are more.
2. Impact drill: 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 through a thread 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 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 disk, and no impact is generated, and it can be used for ordinary electric drill.
3. Hammer drill (electric hammer): It can drill holes in a variety of hard materials and has the widest range of use.
The prices of these three kinds of electric drills are arranged from low to high, and the functions are also increased. The selection needs to be combined with their respective scopes and requirements.
The difference between hand drill, impact drill, hammer drill and electric pick
The hand drill is only relying on the motor to drive the transmission gear to increase the force of the drill bit, so that the drill bit can be scraped in the form of scraping on metal, wood and other materials.
There are two kinds of adjustment knobs, adjustable drill and impact drill at the drill chuck when the impact drill is working. 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 can also drill reinforced concrete, but it does not work well.
The hammer drill (electric hammer) is different. It uses the bottom motor to drive two sets of gear structures, one set to achieve it, and the other set to drive the piston, like the engine hydraulic stroke, which produces a powerful impact force, accompanied by the drill effect. Strength can split the stone and divide the gold.
The electric shovel is a kind of bouncing operation that allows the motor to move and sway, so that the hoe can produce the effect of smashing the ground. The hydraulic pump 镐 uses the gas pressure transmitted by the air compressor to drive the pump hammer in the electric ram to bounce back and forth, thereby producing the effect of smashing the ground, but the electric hoe is only chiseled, and its hoe does not rotate.
All in all, the electric drill can only be drilled alone, and the impact drill can also have a slight hammering effect. Hammer drills can be drilled and hammered higher, while electric picks are only hammered and cannot be drilled.
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