Greetings, home masters! This time I will talk about the criteria for choosing a power tool for the home. Consider what should be considered when buying a drill-driver. With this versatile tool, you can not only drill holes, but also work efficiently with fasteners.

Power supply

The drill - the screw gun is supplied with the accumulator or is calculated on connection to the household power supply network. Each option has certain advantages and disadvantages:

The cordless tool can be used in a power outage. Moreover, the more powerful the tool, the more massive and heavier it is. With intensive use, the battery will fail in 3-5 years, and its replacement will require an investment comparable to the cost of a new product.

The mains power tool is more durable, even the most powerful models are quite compact and fit well in the hand. Drills - screwdrivers powered by the mains have a higher cost compared to cordless ones.

Batteries

The type of power tool in question is usually equipped with a Li-ion (lithium-ion) or NiMH (nickel-metal hydride) battery.

Li-ion batteries are more convenient to use because they do not have a memory effect and do not need to be completely discharged before recharging. The advantage of a NiMH battery is its relatively light weight and long life.

If you plan to use a cordless drill for a long time, pay attention to models with two regular batteries or purchase an additional battery. By alternately putting the batteries on recharging, you can work without downtime.

A number of manufacturers offer power tools with fast-charging batteries - they are ready to work half an hour - an hour after connecting to the mains, unlike standard ones, which require 3 to 5 hours to charge. But such models are much more expensive.

Intensity of use

There are expensive professional drills on the market - screwdrivers worth from 15 thousand rubles and affordable household models, the purchase of which will cost several times cheaper. If you need a power tool designed for heavy loads, pay attention to such a parameter as the duration of continuous operation. The professional tool is also more powerful and has a rugged housing that can withstand drops from heights.

Functionality

Depending on the model, drills - screwdrivers are:

• with extended drilling function (from 1200 rpm);
• oriented to fastening work (from 500 rpm).

Before choosing a power tool, decide which functionality is more important to you and carefully study the technical specifications indicated in the instructions.

Power and other technical parameters of the tool

The power of a drill - screwdriver is usually 0.5 - 0.9 kW. Low-power models are primarily designed for fastening work, a medium-power tool will allow you to drill various materials with relatively low strength. If you plan to regularly drill reinforced concrete or other materials of increased strength, you will need to purchase a heavy, large-format tool with higher power.

The maximum load on the tool is also determined by the torque. This parameter usually varies between 5 - 10 N * m. High torque models are the most versatile, suitable for drilling steel and concrete.

The rotation speed directly affects the functionality of the product. Low settings (up to 1000 rpm) indicate that the tool is primarily designed to tighten fasteners.

Additional functionality

When choosing a model, pay attention to the presence of a speed controller. This feature makes the tool more convenient to use, prevents the drill from jumping off when drilling holes.

A drill-driver must necessarily have a reverse - the reverse motion of the mechanism, which allows you to release a stuck drill or unscrew a self-tapping screw. The reverse button should be located as conveniently as possible, but in such a way as to exclude its accidental pressing. With a quality tool, when you turn on the reverse, the power does not decrease.

The impact function is a necessary attribute of a power tool designed for drilling high-strength materials. Such a tool is more expensive, but allows you to work effectively with concrete.

Cartridge type

Drills - screwdrivers can be equipped with:

• hexagon chuck (allows you to quickly change the appropriate nozzles, which is optimal for fixing work);
• keyless chuck (you can install any type of nozzles).

Equipment

As additional elements, special nozzles (jigsaw), a flashlight for illumination, a depth limiter, etc. can be attached to the drill - screwdriver.

Ergonomics

The quality of work largely depends on how the tool lies in the hand. Choosing the model you like, hold it on weight, listen to your feelings and decide how convenient it is for you. If there is an opportunity to test the tool, be sure to try it in practice.

Please note that the dimensions and weight of the product depend on its power characteristics. For domestic purposes, a compact tool of medium power is suitable.

Advice: if you already have a cordless power tool, it is most convenient to purchase a drill - screwdriver from the same line with the same battery.

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