Drill-screwdriver will always find application in everyday life and on a large construction site. They differ not only by manufacturers, but also by technical characteristics, cost.
To choose a quality drill, all indicators should be taken into account.
Cordless drill - a tool that does not work from the network, but from the battery. With the battery, you can use the equipment anywhere, even where there is no power source. Such a tool is made in accordance with GOST. Among the main technical characteristics:
- engine's type;
- battery capacity;
- cartridge diameter;
- additional functions.
Among the non-core, but not less important:
The greater the power and torque, the better, since drills can make holes even in high-density materials. It can be concrete or brick. In this case, it is 18 V.
The more turns a drill can make, the faster and better the user will get a hole . When the user looks at the description of the drill, he can see such indicators: 1/4, 3/8 and 1/2. When buying a drill, they must be taken into account, since they relate to the cartridge.
The chuck is the part of the drill that holds it. The first maximum size matters, since it depends on what diameter the bit can be used.
It is worth remembering that if you put drills of a larger diameter with the minimum allowable size of the cartridge, then you can break the drill.
The size and type of battery play a special role. The Ni-Cad type, despite their short life span, is superior to lithium and Ni-MH batteries , which work poorly in cold weather and quickly discharge.
The larger the battery capacity, the longer it can work without additional charge . 4 A * h are considered the most progressive , but the cost of such equipment is much higher.
It is important to consider the type of motor, since brushless motor guarantees 20% more power. Most modern drills are sold today with an illuminated work area. In some cases, it is really necessary, because it allows you to work in a dark or poorly lit room.
You can classify 18 volt drills in different ways, for example, into two large groups: professional and household. Or do it in size: large, medium, small and mini-drills. But speaking in terms of professional language, they can be divided by type of battery.
According to the type of battery on the market today there are four main types of drills, in the construction of which there is a battery:
- lithium ion;
- nickel metal hydride;
- lithium polymer;
- nickel cadmium.
Each type has its own differences. For example, lithium ion costs the buyer more than the others , but this is where its shortcomings end. The battery can hold a charge for a long time, it is quickly absorbed by energy, and does not lose capacity over time. This is exactly what is installed in professional drills.
Nickel-metal hydride has the same advantages, but they are more environmentally friendly , so manufacturers increasingly prefer to use them in kits for cordless drills.
Lithium-polymer is a modern solution, but they are not yet fully developed, therefore, they have a short life and. Most manufacturers claim that this barrier will soon be overcome.
As for the nickel-cadmium batteries, they are loved for a five-year life , which surpasses all other options. But they have a significant drawback - they cannot hold a charge for a long time and self-discharge, which does not please the user at all.
Among the huge number of drills there are the best that deserve the attention of the user more than others, because they differ not only in remarkable technical characteristics, but also in reliability.
Like professionals and those who are used to doing housework on their own. This model is compact, equipped with an 18 volt battery, it provides the necessary traction when working with surfaces that have a high density.
You can use a cordless drill for several hours, while it does not reduce productivity. It is permissible to use heavy drills in its design.
Recharge time is only 30 minutes , the case is made of shockproof plastic, so the main components are reliably protected inside. Tightness guarantees good protection of the motor against dirt and moisture. The drill works stably even at extreme temperatures .
Another model, no less popular among professionals. She is a bestseller and has over 1,500 satisfied customer reviews. This drill can do much more than you would have imagined, considering its size. The powerful motor is protected inside a compact design that allows you to use the tool for many years without breakdowns.
DeWalt DC970K-2 is ideal for drilling metal, wood and plastic, is an ideal tool for mounting various designs. Despite its small size, this drill is perfect for professional use.
Porter Cable 20v
It is equipped with a rubberized handle, and the chuck is installed without play, which allows you to firmly hold the drill tool during operation. Work with such a drill is characterized by high accuracy. The maximum number of revolutions reaches 1800 per minute. But this is not all, the drill has a compact size and can perform the task even in hard-to-reach places.
High speed drill. Has 2 speeds, thoughtful design, ergonomic handle. The user can quickly move from one speed to another and change settings. There is a built-in backlight.
Users love this tool for its compact size, built-in memory card, which remembers the settings and functions used.
Charging time is 30 minutes.
Has the ability to change the speed mode. It features the ability to twist the drill clockwise and counterclockwise. It is equipped with a soft rubberized handle, so it is convenient to hold the drill during operation. The user fell in love with the model for light weight and fast charging.
It has many speed settings, which allows you to make work more efficient. The model has 3 punch modes and 3 speeds.
The design of the drill is a combination of two materials: plastic and metal. High-quality illumination allows you to work in hard-to-reach places, but due to the high power, the battery quickly dies.
Metabo cordless drill
It has overload protection, as well as a removable cartridge. The design has a rechargeable battery with a capacity of 2 A * h, so it is better to use the unit in everyday life, it may not be suitable for large tasks.
The manufacturer has provided an air-cooled charging function, it helps reduce the temperature of the battery, so it lasts longer.
It is worth considering that the functionality of the drill is not very large.
It is equipped with a brushless motor, which means that its power is 20% more. As a power supply 2 A * h, rechargeable battery. There are 20 clutch settings, as well as a 2-speed gearbox that helps the user set the proper level of torque to perform complex work.
It boasts, like the previous model, a brushless motor that helps the drill to penetrate the surface quickly and accurately. The design has 2 speeds, and if necessary, illuminate the space, you can use the installed light bulb.
Among many models, this remains the most affordable, while demonstrating decent quality.
Two rechargeable batteries are supplied.
Demonstrates 3 speeds, which are also possible thanks to the brushless motor. You can use such a tool to solve the most complex problems. The backlight helps to see the work surface well. It has an automatic shutdown after twenty minutes .
How to choose?
When buying a drill, you should pay attention not only to additional functions, but also to the type of battery, the number of revolutions and the recharge time. It is good when the manufacturer provides an indication in the design of the instrument to assess the amount of remaining energy .
The number of speeds and high torque are especially important when choosing a drill for professional use, when you have to deal with concrete and masonry work.
As for the cartridge, of course, quick-clamping helps to save time spent on tooling replacement. True, such equipment costs more, but this price justifies itself over time.
Some models are equipped with a special hook, thanks to which you can hang the tool on a belt and free your hands for a while. To take this into account or not, the buyer decides for himself.
As for the engine, it is better to purchase a unit with a brushless motor , which is designed in such a way as to reduce friction and resistance. Its advantage is higher speed and increased power.
Specialists give their advice on the operation of drill drills:
- non-compliance with the instructions dictated by the manufacturer leads to a decrease in the life of the equipment;
- if you do not want the battery to fail and lose its capacity, then you can’t store it with metal products, confuse the poles and keep it charged for more;
- if you use incorrectly selected equipment, you can break the engine by overloading it;
- You can start working with the drill only after the drill is on the surface.
See how to choose a cordless drill in the next video.