Sunday, July 17, 2011

Power. Rotary Hammer or Drill?

Repair the apartment, and especially - building a house, it's hard to imagine without the use of power tools. Electric planes, chainsaws and circular saws, woodworking machines, milling machines, jig saws, hammers, drills, screwdrivers, angle grinders and grinding machines (grinders), and Wall Chasers - this is not a complete list of tools for carrying out these works. However, not all consumers are bound by the rules of operation, and not always correctly make the choice of the power. Power tools can be: for professional use - such a tool requires its long, sometimes around the clock, using a continuous operation and heavy-duty, unprofessional - the tool has a weaker design their sites and requires work breaks at regular intervals. Some manufacturers, such as Bosch, to enhance the differences between these two types of tool paints them in different colors (green for non-professionals, blue - for the pros). The difference in price between professional and nonprofessional tool is essential. In addition, there are two types of food everyday tool - AC or built into the instrument housing the battery. Buying a tool for AC, you need to verify its degree of security, and if it is imported, then whether it is certified for use in our networks. Tool powered by batteries advisable to buy only if you are coming regularly work neelektrofitsirovannyh objects. This tool is certainly more convenient, since no binding to the power supply does not need wires, you can go to the car or the garage. But this same tool has some negative qualities. First, the short duration of work between charges. Secondly, many batteries require his constant use. This tool can not be put on for years without the use of - the battery may fail, but its replacement will cost about one-third of the cost of the instrument itself, and sometimes more. And finally - a tool with battery backup is quite expensive. Hammers and drills there are drills of various kinds: drelirazlichnoy power to shock the rotational action, with reverse, with a smooth and infinitely adjustable speed, with a key and a keyless (keyless) chuck. As a rule, all modern electric drills are reversible and the ability to control motor speed. Another useful addition - handle - helps feel comfortable while working as a "right-handed" and "lefties". Many manufacturers dreleystremyatsya make your power tools, especially drills, multi-functional. Such an instrument besides the main function can perform a few extra: threads, work with wood screws, drill with a bang, ie, serve punch. Some vendors have tools go a step further - offering a set that includes a drill as the main power module and a few attachments to it: plane, angle grinder, circular saw, jig saw, etc. Such a set of make out usually in the form of a suitcase "to master". If the drill is equipped with more punch and function, at first glance this set covers all the requests. You should not stop their choice on these sets. It must be remembered - each operation has its own peculiarity, requires its own power, speed and duration of the instrument. The work tool with an overload or limit its ability to lead to its failure. Drill should just drill, drill only punch, but only a screwdriver turn the screws. Drill Impact Drill Through Impact can perform the following functions: drilling holes in various materials (wood, plastic, various metals, etc.) as well as the usual drill. By the way, in almost all drills hammering impact function can be disabled just a switch, making holes in hard materials (eg, masonry). It should be noted that when drilling with the use of blow hole doing is much faster and with less effort, wrapping / vyvorachivalie screws, screws and bolts. This feature requires a certain skill, but with the impact drill (working in the "no strike"), everything happens much faster and easier. Unlike Drills Impact of the perforator principle of the percussion drill is as follows: est.d.a in contact tooth ratchet. When working tool in the mode of attack, hitting them on the surface causes the drill to jump "on their teeth." The disadvantage of this principle works is relatively small amplitude of the shock, a high degree of efficiency in the work and the need to exert considerable effort for drilling hard materials. In addition, continuous operation drills with solid surfaces, the teeth of ratchets quickly wear out and their (ratchets) to be replaced by new ones. Perforator deprived of all these deficiencies, since its internal structure has a number of fundamental differences from the drill. The mechanism of electro-pneumatic punch in some details like an automatic weapon. Perforator - first and foremost, the device more durable and powerful, especially in terms of drilling holes in hard materials. The rate of passage of perforators much higher returns and less so on If we compare the hammer and drill at the same level (same manufacturer, same class of tools, etc.), then the punch is more expensive. By jackbits increased demands, so they are more expensive than usual. Since the drills are undergoing a very specific load, they are specially designed mounting in the chuck, which makes it impossible to use conventional drills without a special adapter. The use of transitional devices with standard cartridges significantly prolongs the whole construction and makes uncomfortable, and sometimes virtually impossible usual drilling without impact. Therefore, when selecting a tool to clearly understand the specifics of upcoming works. If major works are on wood and metal, and brick walls, Drill Impact - this is what you need. If you also have to work with holes in concrete, then buy a good punch. The main characteristics of drills and drills in the data sheet of virtually any manufacturer identified the following main characteristics of the power: Power rating; number of revolutions or the rotational speed at idle, speed regulation (speed depends on the force pressing the start button), you can use two-speed drill; Button fixing the circuit breaker. Reverse function to rotate the drill on both sides Drills are equipped with two types of ammunition: gear (cartridge with a key), in which the drill is secured with a special key (which, in turn, may be lost) and quick-to secure the drill enough small arms efforts . In the punch is commonly used mechanism for fixing SDS-PLUS, which allows for only a special drill bit and does not require a key to fixing. In some models of drills used conventional ammunition. How to drill for drilling wood, particleboard, soft and hard plastics and metals used an ordinary drill bit of high-strength steel. For stone, brick or concrete - carbide drill. Such drills are soldered on the tip of a plate made of hard (harder than concrete and stone) alloys. As such, commonly used win - hence the name "pobeditovye drill." Wins in their nature - an alloy of tungsten and cobalt in a ratio of 90% to 10%, respectively. Developed in 1929 in the Soviet Union mainly for cutting tools. Today it is used by other tungsten-cobalt alloys. Pobeditovye drill material is not cut and crumbled, so suitable for drilling the wall is ideal, but to work in wood, plastic or steel are not godyatsya.Pobeditovye drills do not cut a tree and tore its fiber - a hole is obtained by "hairy", ugly and has a larger diameter than necessary. Roughly the same story with drilling plastic, but plus to the above, the design pobeditovogo tip in the proper degree does not ensure chip removal, the hole becomes clogged, which leads to a decrease in the efficiency of drilling and increased load on the drill. Steel drill this drill is impossible. Wins can be of different brands. In addition, targets for different materials. For harder materials (eg granite) are used to drill hard or medium hard pobeditovymi plates, and for softer materials (brick, soft concrete, etc.) you can use drills with soft or medium soft plates. If you drill steel, hard plastics and the like, the angle "alpha" should be about 25 ... 30 0. Prosverlivaya soft plastics, wood and other soft materials, the angle can be uvelichit.d. 45 ... 50 0. However, pobeditovye bit afraid of overheating, do not put strong heating tip drills and often it is cooled by coolant (suit and plain water). But if the tip is still a red glow, then dip it into liquid by no means impossible - plate instantly crack. Sales are well represented drills for different purposes and different manufacturers: a simple and pobeditovye, sets and pieces. Kits can be made of drills a "face value (eg: 2, 4, 6, 7 mm), with an interval of 0.5 mm (2, 2.5, 3, 3.5, etc.) for drilling a thread, consisting of drills of small diameter (8 mm) and large (over 14 mm), etc. To set gives a box - a useful thing to store, and the drill will not be lost. True, small-diameter drill bit is often broken, so they still have to buy more later. Safety of the power key indicator of safe operation of power tools can be called noise, electrical safety and ergonomics. Power tool connected to an AC voltage of 220 V must have a reliable electrical protection. Otherwise, it may source current strike, with grave consequences. Most manufacturers of the instrument has a special character double insulation. It is a double square, executed in various graphic design. One of these decorations shown. Double insulation - this is for protection against the current strike. The first level of insulation is placed on all electrical components of the structure. The second level of isolates all the elements of corpus tools. Tools, double insulated, you can connect to the network via wire circuit - a fork with two pins in the socket without earth. Tool should fly only with double insulation. Preference should also be given to models that have special protection against an accidental launch. This defense is usually that the permission to push the main start button is confirmed by pressing one additional button. In addition to a pleasant appearance power tools should be comfortable and as easy. Housing must have an ergonomic tool, ie comfortable to hold and shape of the body, and controls should be easily accessible. For some kinds of tools can be called absolutely necessary two devices - the maximum speed regulator and the starter. In the presence of the soft starter tool can continuously gain momentum in proportion to the depth of pressing the power button. For an instrument with a large selection of dust (grinders, jig saws, planers, milling machines) it is desirable to have an adapter - a special partrubok on the tool body, with which you can plug a vacuum cleaner. How to choose a hammer drill and have better quality of the collected articles noise should be smooth without dips and subsequent refinements, without knocking, which are transmitted on the cover. But the product selected by the most smooth noise, should be subjected to yet another test. Turn it on and then set the maximum speed off. Notice how it stops. Reducing speed should be smooth, gradual. With the engine switched off at the last stages stopping products clearly audible noise of all the nodes. The product should not stop as a "petrified" or close to it. If this happens, then something in him is not right - drag bearing assemblies, there is no necessary gap in the toothing, in this case it is necessary to repeat the selection of products first. If the product stops smoothly and the noise of the rotating mechanism is not manifested some rare knocks - it's what you need.

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