How to choose a screwdriver?

If you want to build a cabinet or repair something in the apartment or cottage. For these purposes, you need a screwdriver. It is a compact tool that will be faithful assistant in everyday life. However, it is important to choose a screwdriver, so he could handle the load, and stable for a long time worked. Let's look at the main types and features of the tool, which necessarily have to look before buying.

What are screwing on the type of food?

Tool Manufacturers offer two basic types:

• Network - is connected to a household outlet, meaning it runs on 220 V. On the one hand it's great, because the operation of such devices is not limited by anything, but on the other hand, it makes it attached to a power source, ie, use the screwdriver where there is no outlet, will not work.
• Battery- This option is more mobile, as powered by the removable batteries. It's very useful when working in tight spaces and where there is no network or can not reach the power cord.

Features of different types of batteries

Modern screwdrivers can be equipped with different batteries. They differ in terms of capacity, weight, volume. The most common are three types of batteries:

• Nickel-Cadmium - is the cheapest option. They are often equipped with a low-end model. It is important to remember that the battery is working long before recharging it must fully discharge. Otherwise, its capacity will gradually decrease. Store is also better in a fully discharged state.
• Nickel-metal hybrid - are more expensive, but they lack some problems of nickel-cadmium batteries. They have eliminated the memory effect and self-discharge is reduced as much as possible.
• Li-ion -batteries of this type are usually equipped with professional screwdrivers. They are more powerful and reliable in operation.

How screwdriver can work on a single charge

It depends on the capacity of the battery and the operating voltage of the motor. The higher the product of capacitance and voltage, the longer it will work screwdriver on one charge. Some models are equipped with two batteries, it is almost completely eliminates the problem of a short operation of the tool. One battery you are using, in this time of the second charge. If you complete the second battery is not present, it is possible to take care of it and buy a spare to replace.

With regard to specific values, for domestic use would be enough power supply capacity of 1 Ah, as professionals-1.5 Ah or higher

.

Torque

This parameter characterizes the force that can make the tool during tightening. The figure is higher, the screwdriver will work effectively with solid materials.

• 10-12 Nm - indicators of household screwdrivers which can easily cope with the assembly of furniture or tightening screws in drywall
.
• 20 to 40 Nm - a powerful tool that can be used not only to build, but also for drilling
.
• From 40 Nm - this figure usually have professional screwdrivers, which are able to cope with a very wide range of tasks
.

The types of ammunition used in the screwdriver

Commit bit or bits in the screwdriver by means of a special holder, which can be of several types:

Key cartridge - then the drill is mounted in a holder with two hands-free using a special clamping key. It is used most often in high-power screwdrivers, as is highly reliable fixing drill.

Keyless chuck -the most common variant. It is very convenient and easy to assemble, which makes it possible to fix the drill quickly and easily. Keyless chuck divided into 2 types:

• Odnomuftovy. This cartridge is equipped with an automatic spindle lock feature, so drills and bits in it are changing quickly with just one hand.
• Double box. This holder for fixing the need to use two hands. Typically, these cartridges are used in low-end models.

The convenience and ergonomic properties

When working with screwdriver is necessary to consider not only the efficiency and productivity, but also the comfort of the master. Therefore, in addition to the technical characteristics necessary to consider the following features and tools:

• Balance. High-quality electric screwdriver will always sit comfortably in your hand. It is very important to feel good balance-tool should not lurch forward or backward, or from side to side. If there is no balance, then work with a screwdriver will be uncomfortable, the hand will get tired quickly, it may be difficult to control the device. Note that the battery model is easier to network, so with them often to work more comfortably.
• Ergonomic handle. The handle should be comfortable shape, welcomed the presence of special rubberized inserts that ensure maximum secure fit and easy hold in your hand. Screwdriver will not slip during operation.

What additional features can have a screwdriver?

There are a number of features that are not basic for all devices, but their presence is a big plus, these include:

• Overheat. The presence of built-in thermal protection ensures long-term and safe operation, it protects against overheating of the rotor.
• Spindle lock. Simplifies the process of changing the equipment in the cartridge;
• Highlighting. The built-in flashlight allows you to work in dark areas or in remote locations, where low light.
• Case for storage. If the screwdriver comes in a special carrying case, this instrument will provide the necessary conditions for storage. None of the small parts kit (bits, drills, attachments, etc.) Is not lost, the tool will not collect dust, etc.

If you want to buy a screwdriver, the first thing you need to determine the tasks, the solution of which will have to provide a tool. If you plan to use rare for domestic use, then you can safely take the network model. This will save. When will a lot of work, for example, global repair in an apartment or cottage, it is better to give preference to the battery model. They are more mobile and more functional, can cope with a wide range of tasks. It is best to take the model with two batteries and take care of the purchase of an additional power supply. Hopefully, these tips will be useful. If you are undecided, you can always buy a screwdriver in Kiev, Odessa and Kharkov in the online store at competitive 130.com.ua prices with delivery across Ukraine.

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