cordless drill
The farm always needs tools to help equip the house, collect something, repair it. Now we will learn how to choose a screwdriver - a bright representative of the tools needed for a real owner.
WHY A SCREWDRIVER IS NEEDED
First, let's understand what kind of work a best 12v impact driver is used for, how much it is useful and whether it will be idle for years. With its help you can:
screw and unscrew various fasteners, such as screws or bolts.
drill wood, metal and other materials;
cut a thread;
tighten anchor screws and dowels.
If you need to hang a shelf, a picture, fasten a cornice or a handle to the door, a screwdriver will help you do it quickly and reliably. It will be needed when assembling the body and audio equipment, assembling furniture, installing drywall, and many other repair and maintenance work. Most often, a screwdriver is needed in the country, where you constantly have to do something with your hands. This is a tool that should be in any home, along with a hammer and screwdriver. Of course, it is not necessary to buy a very expensive and powerful model. A reliable screwdriver with medium parameters is quite suitable for ordinary household work. On what grounds to choose it?
INSTRUMENT PARAMETERS
To know how to choose a screwdriver for the house, you need to have an idea of its basic parameters. The main characteristics of the screwdriver are:
the number of revolutions in a single move or just the number of revolutions;
torque;
type of power supply.
The number of revolutions is clear. The more revolutions the device makes, the faster it drills or tightens the screw. If the screwdriver performs only the function of twisting, then 500 revolutions per minute or less is enough. If it also works as a drill, which is quite common, the number of revolutions should be at least 1200 per minute. This electric drill is quite suitable for a wide range of work with wood.
The torque shows how much effort the tool can overcome in working condition. The greater this value, the stronger the materials he will be able to drill. Since this is now a household appliance, not a professional one used by construction specialists, 15-30 N m is enough. In more powerful tools, the torque can reach 80-130 N m.
The power of the screwdriver can be from the accumulator or a network. Because the presence of the battery allows you to work anywhere, allows you to move the device freely and do not depend on the location of the nearest outlet, more and more models are available with this type of power.
The more powerful the battery, the more the tool will be able to work without recharging. You can also purchase a model with spare batteries to replace if necessary. The most modern and environmentally friendly - nickel metal hydride batteries. They are compact and can withstand a large number of recharges (up to 500), but their cost is high. We must remember that they are capricious to negative temperatures and keep them charged.
Nickel-cadmium batteries are cheaper, but the presence of cadmium makes them very toxic, so in Europe they are gradually being abandoned. There are also lithium-ion, but they are much less common, and their cost is quite high, although they are two powerful and great for long-term work.
Pay attention to such an indicator of the battery as the product of current for time (capacity). The larger it is, the longer the tool will work, as the battery will be able to hold a charge longer.
ACCESSORIES AND APPEARANCE
It is impossible to fully answer the question of how to choose the right screwdriver without considering the components and appearance of the product. Most screwdrivers are sold without additional parts and accessories, but there are kits that in addition to the main tool includes a set of nozzles (bits and drills). This is very convenient, because the fuller the set, the more types of screws you can tighten / unscrew. In any case, bits and drills can be purchased separately.
Always pay attention to the design of the handle. You should be comfortable holding the screwdriver in your hand when carrying out the work. The most popular devices now with a handle in which the center of gravity is balanced, it is much easier to work with them. This handle is made in the center, in contrast to the pistol look. The ergonomic factor is especially important for those who work long hours, assemble a complex large structure.
ADDITIONAL FEATURES
Universal are drills-screwdrivers which can be drilled and twisted alternately. They are provided with speed switches. If you are interested in how to choose a ratchet drill, you need to pay attention to the speed of the device. Usually a speed of 500 rpm is enough for twisting, and 1300 for drilling.
Buying a model that can do more than 1300 rpm is worth it only if you want to drill very hard materials. Powerful devices can be used to tighten large screws in length and diameter. If you want your electric drill to be suitable for concrete work, it is best to choose a percussion model with a torque of about 80 N * m or more.
All screwdrivers have a speed limiter. This is a ring that is directly behind the clamping chuck. Adjusting the position of the ring, set the maximum force after which the cartridge stops rotating. This is necessary so that the slot of the fastener does not break, so that the screw does not go too deep and so that the bits wear less.
An important part of a screwdriver is the chuck. With its help nozzles for various works fasten. The chuck can be clamped quickly with a wrench. The first option is much better, so pay attention to it.
A very convenient feature - the reverse flow (reverse). If present, you can unscrew the screw or remove the drill.
Some tools have backlighting, which makes it easy to navigate in the dark. There are models with a low battery indicator, which is also quite convenient. There are also models with automatic screw feeding and a magnetic holder, but they are more suitable for professionals.
Today it is impossible to do without such a tool as a screwdriver.
At first glance, there is no great need for it - the screw can be tightened with a screwdriver, and somewhere in the course will go nails. And only after working with a screwdriver do you understand how it is needed.
With it you can forget about fastening on nails, replacing them with the same screws. This is both more accurate and more reliable, and easily corrected for errors. And the design itself, assembled with screws, is easily understood later. Nailing is a rough job that often spoils the material, shaking the whole structure.
In order to understand which screwdriver to choose, you need to know what they are, their specifications, why it will be used and where.
WHERE APPLICABLE
Unscrew / tighten bolts, screws, bolts and other fasteners.
Drilling holes in bricks, metals, wood.
Drilling winter holes for ice fishing.
Mixing of paints and construction mixtures.
VARIETIES
The market of construction tools is ready to present a large number of tools from different manufacturers that differ in their parameters. They are divided into household and professional depending on power, cartridge size, nutrient, additional features, price and delivery. This division is inherent in most construction tools. Which screwdriver to choose?
According to the nutrient, this type of tool can be divided into two groups: electric and cordless (Ni-Mh, Ni-Cd, Li-Ion).
Source: https://svop.org/