Screwdriver torque - a significant parameter that you want to pay attention to when choosing. Be sure to take into account will be used for homework or professional tools. On sale today there are a variety of models that differ in their characteristics.
There are many models of screwdrivers of various manufacturers on the construction market, which differ depending on the power source, details and functions.
Screwdriver is the most frequently used tool that is indispensable in the construction and repair activities. Today, manufacturers offer a variety of models that can be used under different conditions. This tool is convenient for manual work, it is necessary for tightening / loosening screws, screws, self-tapping screws, for drilling and even for mixing building mixtures.
By power source the instrument is classified into:
The cordless screwdriver is powered by the supplied battery.
- Battery models powered by special batteries. They increase the weight of the tool, but make it easier to work in hard-to-reach places.
- Network appliances that require electrical connection. They have a limited area of action due to the length of the cord, although extension cables can also be used.
By purpose, the equipment can be divided into:
- models for construction / repair work;
- for production workshops, workshops, car repair shops;
- for industrial enterprises;
- for household use.
There are on sale models professional, semi-professional, household. When choosing attention should be paid to torque, which shows what kind of work can handle the screwdriver.Back to table of contents
What is meant by torque?
The device is a cordless screwdriver.
Torque is the value that allows you to determine the level of load on the equipment. Which option to choose? It is usually equal to 5-10 Nm, this is quite enough for safe and high-quality tool operation. This option is provided for most household and semi-professional models that easily cope with taut self-tapping screws, drilling steel, and concrete.
What should be the torque? Pay attention to how the tool will be. For example, for a universal device, it is necessary to choose rather high values of torque in order for the tool to cope equally well with any type of work, whether it be self-tapping screws or structurally rigid materials. If you need a tool only for drilling wood, then you can prefer a model with a small moment from the number of household. When choosing, attention should be paid to the number of revolutions. For example, 400-500 is enough for screwing screws. For drilling hard surfaces, it is best to use devices with a speed of 1200-1300 per minute.Back to table of contents
The ratio of torque and screw diameter
When choosing a cordless or network screwdriver, it is important to correctly determine the ratio of the screw diameter and rotational speed. This dependence is not determined too difficult:
For tightening screws of different diameters, different rotation speeds are required.
- If the screw diameter is 6 mm, then the rotational speed during screwing will be 10 Nm. For materials of structurally soft or hard frequency will be 25 Nm.
- If the screw diameter is 7 mm, then the torque when working with rigid materials will be 27 Nm, and for soft materials - 11 Nm.
- With a maximum screw diameter of 8 mm, the torque will be 30 Nm.
What does this ratio show? You can determine exactly which torque can be used at a certain diameter of the working screw. The right choice will not only make the work more efficient, but also improve the quality, reliability, durability of the equipment. The operation will be performed much faster, the operator will spend less effort.
In network equipment, high power has little effect on the operation process, and the batteries sit down quickly. Therefore, it is necessary to have spare batteries and the possibility of charging the already planted ones. Usually, manufacturers use spare batteries for professional tools, but for simpler models, at least one battery will have to be bought separately. When choosing a screwdriver, it is necessary to take into account the presence of another function - reverse stroke. It is necessary in the case when the drill is stuck in the material. Such a reverse is usually electronic, to control them, you should use a two-way switch, which is located near the start button.Back to table of contents
Which torque is better?
Screwdriver is a tool that is needed for various kinds of work. This is not only construction, but many home repairs, such as furniture assembly, installation of communications. In order to choose the right equipment, attention should be paid to the torque on which the comfort and quality of work depends. For example, to build furniture too powerful tool is not needed. If you plan to install an interior partition, then you need to take more professional equipment that will perfectly cope with the task.
Drills and screwdrivers are used for mixing building mixtures, you just need to purchase a construction mixer nozzle.
The torque of such tools should be sufficient so that even the most viscous mixtures and solutions can be mixed, to ensure their uniformity, high quality.
For mixing concrete and other viscous mixtures use special nozzles.
If you want to use nozzles for building solutions, then the torque should be sufficient to cope with the mixtures not only of weak viscosity, but also high. The choice of model depends on the planned work. If you want to use a screwdriver for mixing liquid mixtures, then the torque may not be too high. If the instrument is purchased for working with viscous mixtures, then it is necessary to prefer professional devices, the turnover of which is high.
Equipment that will be used for a variety of jobs must have a speed regulator. Then the torque can be changed depending on what kind of work needs to be done. When choosing a screwdriver, you need to look to ensure that the lock for the control button always works, and not only with maximum effort. In the first case, the tool can be used for any job with the most convenient conditions. The value of torque is the ability to change. It is recommended to buy models that have manual or electronic control. They have a special step-down transformer that works great with liquid mixtures when the voltage goes down.Back to table of contents
What to do when working with viscous mixtures is required?
Not infrequently, an impact screwdriver is used to knead viscous mixtures. To do this, choose equipment with high power, since ordinary household already with the assigned work can not cope, the effort will not be enough. The torque of this device must be high, i.e. buy should be professional equipment. It is possible to use mechanical built-in gearboxes, they make it possible to use equipment even at 1st speed. It is necessary to provide a cooling system, it is important to prevent overheating of the motor.
If the screwdriver is used to assemble the shelves or install a conventional cornice, then high power is not needed, the torque will not be of particular importance. If the equipment is purchased for frequent use, and the work will need to perform various, related to the preparation of mortars, then it is necessary to choose from semi-professional and professional tools. They will provide all the required conditions for quality work.
Choosing a screwdriver home, you need to pay attention to its many parameters. It should immediately decide whether you need a professional tool or a not very powerful household tool. After that, you should familiarize yourself with the proposed set of functions, technical characteristics, among which torque takes an important place.