Can electric hammer and electric drill be used as a universal drill?
Electric drill can be divided into 3 kinds: hand drill, percussion drill, hammer drill. 1, hand drill: the minimum power, and the scope is limited to the use of electric screwdriver drill for wood, do not have much practical value. 2, impact drill: the impact mechanism of impact drill with ball type two and type. A ball impact electric drill consists of a moving plate, a fixed plate, a steel ball and so on. Brake disc is connected with a main shaft through threads, and with 12 balls; fixing by pins fixed on a casing, and a 4 ball, in the role of thrust, 12 ball 4 ball rolling along, the hard alloy bit to produce rotary impact motion, can drill a hole in the brick, brick, concrete and other brittle materials. The utility model can make the fixed disk rotate with the moving disk without impacting, and can be used as an ordinary electric drill. 3, hammer (hammer): drill holes in any material, the most widely used. The price of the 3 kinds of electric drills is arranged from low to high, and the functions are also increased. The selection of them requires the combination of their respective scope of application and requirements.
The working principle of electric motor rotor electromagnetic rotary or reciprocating electromagnetic small capacity motor to do work cutting magnetic field operation, operation device driven by the transmission mechanism drives the gear increase bit power, so the drill bit scraping the surface of the object, through the object better. Drilling machine using electric power as power. Is the power tools in the conventional products, but also the largest demand for power tools products. 35% of China's power tools are produced and sold each year. The main specifications of electric drills are 4, 6, 8, 13, 16, 19, 23, 32, 38, 49mm, etc. the figures refer to the maximum diameter of the drill drilled on the steel whose tensile strength is 390N/mm2 (). For non-ferrous metals, plastics and other materials, the maximum drilling diameter is comparable to the original specifications of 30 to 50%.
An impact drill can be used for natural stones or concrete. Hammer rely on the rotation and Strickland call work. A single beat is very high, and has 1000 per minute to 3000 beat frequency, can produce significant force. Compared with the impact drill, electric hammer needs a minimum pressure to drill into hard materials, such as stone and concrete; especially the relatively hard concrete. The impact of drilling under normal circumstances is not for use because of a drill, impact drill in use when the direction is not easy to grasp, prone to misuse, open the hole is too large; the two bit is not sharp, so that the holes are not neat, burrs or cracks; three even if there is a change-over switch, also do not try to drill, unless you use a special wooden drill bit.
If the general impact drill is 6-700W, how large holes can be drilled depends on the size of the drill bits that are matched with it. In general, the maximum diameter is 5 cm. Percussive drills work by rotating and impacting. A single shock is very slight, but a shock frequency of more than 40000 minutes per minute can produce continuous force.
