How to choose an electric screwdriver drill for the home
Choosing a Electric Screwdriver according to the Advice of Specialists
If you’re reading this article, it means that you have started to make repairs at home or just beginning this process, and you think, what cordless electric screwdriver is better to buy, so that then do not regret. It is not so easy to choose, because manufacturers offer hundreds of different options with many functions, different characteristics, weight, voltage, shape, type of chucks and bits This list can go on for a long time, because for each individual task a similar tool is produced.
Expensive is not good. If you need a reliable electric screwdriver for home and country, and you’re just going to buy the most expensive tool in the hope that it will be better than others. you are deeply mistaken. Often overpaying for extra features that only a professional needs, and the average user won’t even notice. For example, why overpay 2500 for pulse tightening or a couple hundred for extra torque mode? Now we will tell you what is really important for a beginner builder, and what is better electric screwdriver to work at home or at home!
Domestic and professional screwdrivers
From the general name it is well understood that the household wrenches are designed for infrequent household work, and the professional tool. it is an indispensable assistant to a specialist in construction and repair work. These two types of screwdrivers differ in power, chuck size, power features, the presence of additional functions, weight and, of course, the price.
Household (amateur) screwdrivers should be taken when you need the tool infrequently and will use it for a short time. Such devices are lightweight, often performed with battery power, are inexpensive and cope well with tasks such as assembling furniture or changing a lock. Speed is rarely higher than 400-500 rpm, and torque is usually about 10-15 Nm.
If you constantly make something on a craft or engage in professional repair, and the electric screwdriver will be used almost every day and for several hours, you need to take a tool more respectable. Professional screwdrivers are more powerful, easily withstand high loads, they will not replace the drill, but if necessary, can even cope with drilling hard surfaces. They have the rotation speed of 1300-1500 rpm and more, and the torque. 130 Nm.
To determine which electric screwdriver to choose, you need to sensibly assess the future load on it and the type of work performed. Not always the more functional professional models are the best option. In the economy to perform minor repairs enough to have the most simple electric screwdriver, especially since the for such tools do not bite.
Types of drills for use
Depending on what set of functions the drill has, there are these main types of tools:
All of these modifications are quite different from each other, including the price, so when buying it is so important to be aware of the purpose of using the tool.
This is a drill without any frills. It has no impact function, so you can drill with it only wood, drywall, metal and other not very hard surfaces. This tool is good for small repairs in the country house, barn, wooden house. Regular drills without an impact function can be cordless or mains powered.
Impact drill will be necessary for those who are going to drill holes in concrete, brick, stone and other hard materials. Such a tool is cheaper than the most simple drill, but it has some limitations. It cannot hold heavy materials all the time, it will break quickly. Also, frequent drilling in concrete and stone can have a negative impact on the accuracy of normal drilling. If you have to work regularly with dense materials, it is better to get a peorator.
The impact drill acquires the ability to penetrate hard materials through a special design. During operation, the drill not only receives a rotational action, but also an impact action. In a peorator, the impact is created by a complex electro-mechanical or electro-pneumatic assembly, but in a drill, the impact is created by two ratchets. One is located inside the drill, the other is attached to the chuck. When the two elements are connected, the chuck and drill bit move axially and progressively, giving the drill a chisel or hammer function. If necessary, the impact function can be disabled, the ratchets are disengaged, and the drill works as usual. Some models, however, do not have the option to disable it. so choose carefully.
A drill with a hammer function is more expensive than a regular drill, but cheaper than a peorator. Plus, it is also lighter than a torch, so it can be called a universal home tool. When choosing an impact drill pay attention to the power of the tool. For a normal impact function, it should be at least 800 Watts. Also note the reverse rotation function and the safety clutch.
It makes sense to choose an electric screwdriver drill if you also need a tool for tightening/unscrewing screws, self-tapping screws and screws. In electric screwdriver mode this drill has a low speed and high torque, in drill mode. on the contrary. This drill cannot be called completely universal, because it is not suitable for drilling in concrete or masonry.
The mixer drill differs from the usual universal drill by the presence of special attachments in the kit, which allow you to conveniently mix liquid and semi-liquid compositions. The tool is usually designed with special handles for a comfortable grip while stirring. The mixer drill is suitable for mixing putties, glues, paints and other construction mortars of up to 10 liters and provides more thorough mixing than a manual process.
As the name suggests, this tool is designed for drilling in the most remote and narrow places, where conventional drills can’t reach. The design of the device is distinguished by the presence of an angular gearbox and the location of the rotating shaft perpendicular to the body. Such drills, as a rule, have a low power, and there is no impact function to speak of.
An angle drill is a very specific tool, so it is better to take a regular model and, if necessary, use a special attachment. it is cheaper and in most cases smarter.
Depending on the power source, drills can be divided into two types:
- corded drills operate from the electric network, have high power and are easy to maintain. you only need to find a socket and do not care about the battery charge. Tied to the socket. this is the main disadvantage of such devices, as when working outdoors or frequent power outages can cause problems;
- the cordless drill makes it possible to work in places where there is no electricity or access to power is difficult. On top of that, the absence of wires provides freedom of action. The downside of the medal. low maximum power and the need to constantly monitor the battery charge, and sometimes buy a new. Battery life. 0.5-2 years, you will need to buy certain batteries.
When selecting a cordless drill, pay attention to the type of battery. The lithium-ion Li-Ion is the most popular and preferred, it is relatively light and durable. Nickel-cadmium NiCd allows normal operation in freezing temperatures, but has a pronounced memory effect. Suppose you have 15% capacity left and decide to put the battery on to recharge, the next time you have a 15% capacity, the drill might not work at all. This, of course, has a negative impact on durability, and in the work interferes. Nickel-magnesium NiMg battery does not have such a pronounced memory effect and weighs less.
The higher the battery capacity, the longer you can use your drill without recharging. Higher-capacity batteries are usually put in professional drills. Charging time also differs: in domestic models it can be up to 7 hours, but in professional models it is much shorter. about 1 hour.
Important characteristics of screwdrivers
Based on these parameters, you can choose the best model for you.
– Today it is the most popular type of battery, which is used everywhere in technology. from cell phones to electric cars. It is very reliable, powerful, holds its charge well, has an extended life of charge/discharge cycles, and has no memory effect. Suitable for frequent use. However, lithium screwdrivers are more expensive than their counterparts. By the way, the inventors of lithium-ion batteries were awarded the Nobel Prize in Chemistry in 2019 The battery “from the past”, today installed mainly on domestic models of screwdrivers, which are used occasionally. Their main advantage is their low price. A serious disadvantage of these batteries is the memory effect: if you charge a battery that has not been fully saturated, its maximum capacity will be somewhat reduced. If you continue to charge a battery that is half discharged, it will soon use up its life prematurely and fail. Another disadvantage of this type of batteries is their lack of environmental friendliness. After all, cadmium is recognized as an adverse metal for health and the environment. Therefore, the use of nickel cadmium batteries requires special care an advanced variety of nickel batteries. they work perfectly well at subzero temperatures, the memory effect is weaker than in the case of nickel-cadmium batteries. But they are a serious drawback compared to lithium-ion batteries in terms of the number of charge-discharge cycles the latest generation of lithium-ion batteries developed by Metabo specifically for power tools. They are smaller and lighter than conventional lithium-ion cells, according to the manufacturer, and deliver maximum power as well as mains power.
– the most common motor type in tools and appliances. The power supply sends electricity to the motor through sliding contacts with special brushes. Brushes are a consumable item that wears out over time and needs to be replaced. In some models it is impossible to quickly replace the brushes and the electric screwdriver will have to be thoroughly disassembled. The main advantages of a brush motor are its simple construction and low price a more powerful electric motor, with high efficiency. There are no moving parts inside, and the current transfer is regulated by a semiconductor commutator controlled by an electronic sensor. Brushless motor is well tolerant of heavy loads, wear-resistant and does not spark when in working order. But it significantly increases the price of an electric screwdriver.
Battery powered, quick-action chuck type, torque 9 Nm, max. Speed 550 rpm, capacity 1.1 Ah, 12-volt, backlit work area, weight 1.32 kg.
In the chuck are fixed special nozzles (bits), by means of which the electric screwdriver works. In the models on the market there are several types of chucks:
– the most common. Allows you to change the bit in a couple of movements;
- magnetic. bits are held in place by magnetic force. because of its unreliability, it is most often used in electric screwdrivers and small screwdrivers;. the bit is fastened in the chuck and then tightened using the side toothed wrench, as in an electric drill and a rotary tool. It is the most secure type of fastener. Naturally, it takes some time to change the bit;. Suitable for certain types of bits. Allows you to replace them quickly.
Power of an electric screwdriver
The power of the power tool directly affects its performance. For screwdrivers, this means how much torque you need to apply to unscrew a screw or check a surface. It is measured in nm (Newton-meter). the higher it is, the more power it has to clamp the bit and the larger the screws can be clamped. However, excessive torque can damage the nozzles, so in many models, it can be adjusted with a special coupling. If you intend to work with small fasteners, a screwdriver rated at 10-15 nm is also sufficient. These are typical values for electric screwdrivers. The power of professional models is around 25-30 nm. Screwdrivers with this power rating can easily drive screws up to 7 cm in diameter. Higher models have a torque of about 40 nm, can cope with long screws and even drill small holes in not too dense materials. The power output of professional screwdrivers can reach up to 130 nm. They can drill holes in dense materials, used, for example, when installing stretch ceilings. Power screwdrivers, as a rule, operate from the electric network.
Speed (or frequency) of rotation
This is an important characteristic that shows at what speed the chuck and nozzle will rotate. The general rule is quite simple. at a lower speed you can drill through denser material or unscrew screws with a larger diameter. Measurement unit. revolutions per minute (rpm).As a rule, the chuck speed is controlled by the force of the push button (trigger). With some models the speed can be adjusted with a special gear unit. High speed for drilling, low speed for fastener installation. So, for tightening self-tapping screws, a speed of approx. 500 rpm is sufficient. On the contrary, for drilling to be comfortable will require already 1000-1500 rpm.
Types of screwdrivers:
Battery powered, bit chuck type, torque 1.2 Nm, max. 180 rpm, Lithium-ion battery pack type (Li-Ion), capacity 1.3 Ah, voltage 3.6 V, carrying case. weight 0.35 kg.
Battery powered, chuck type Quick-action chuck, torque 30 Nm, max. Speed 1700 rpm, battery type Li-Ion, 12 V, work area lights, weight 1.1 kg.
Speed of rotation
A good electric screwdriver must be equipped with a switch to two speeds in order to work in two modes. This parameter is very important if you are going to use the tool as a drill, where at low speeds the drill just will not give the desired effect.
For screwing/unscrewing screws and bolts, a slower speed of about 500-600 rpm is used. If you want to drill something, choose a tool that can rotate up to 1300 rpm.
What other additional features will help you choose a cordless electric screwdriver:
- If there will be an impact function, this is a big plus. It is clear that concrete walls cannot be drilled with an electric screwdriver, but it will cope with brick or aerated concrete without any problems.
- A removable side handle is also a plus when drilling. It accentuates the force.
- Impulse work will give the opportunity to cope with rusty threaded joints. With electric wrenches, this function is present by default.
- Built-in light located under the chuck or at the bottom of the handle. The last option is preferable, because, as practice has shown, some cartridges obscure the LED beam.
- Product weight. The smaller it is, the more convenient it will be to work, especially at height.
- Package Contents. The more extras, the better. For example, a flashlight, charger, extra battery, pouches or straps in which the tool is inserted during work. Let’s add a set of bits and drills, an adapter, a chuck, an eccentric. The latter is used when it is necessary to transmit rotation to the working tool with an offset in relation to the spindle axis.
The more equipment you have, the more expensive the tool.
Criteria for choosing a cordless electric screwdriver
Before you buy a mains electric screwdriver, the user must decide for what specific purposes he will use it. To realize this allows a competent assessment of the following its main technical characteristics:
The main, performance-determining characteristic. So, the higher its value, the longer self-tapping screws can be screwed. For example, 300-watt models allow you to screw in hardware up to 70 mm, including through a thin sheet of metal, as well as drill through wood with a thickness of 10-15 cm.
1.5-2 times more powerful analogues are capable not only of screwing in hardware of maximum length, but also of drilling relatively thick metal plates. However, with the increase in motor power the weight of the device inevitably increases and the comfort in its operation. In addition, the power consumption increases.
Correctly choose an electric mains electric screwdriver for the home also allows you to take into account the torque. This is the second most important characteristic that affects the overall performance of the tool. Set by 3 factors. drive power, gearbox type and spindle speed.
The higher the value, the longer the hardware can be screwed in with the gun. For example, to install a 60-70 mm screw it is enough to use a model with 30 Nm, and for 100 mm metalware you will need a device with 40-50 Nm. Some wrenches have a special regulator for setting the right torque. if you want to work with screws of different lengths.
The reverse function allows you to reverse the rotation of the drive head from forward to backward, and vice versa. this is often necessary when dismantling constructions and removing old screws.
Otherwise the user has to use a screwdriver, which is long, laborious and unproductive. The reversing mechanism also makes bit resetting faster.
In addition to the absolute rate of rotation of the tool, for the choice of a network electric screwdriver, not the least important is the possibility of their increase and decrease. This will give you the opportunity to choose the optimal speed for your work in specific conditions. So, for screwing screws of small lengths, the minimum number of revolutions is required, for large. the average, and for drilling materials the maximum.
If the gun does not involve a change in speed, then for a particular type of operation you need to pick up a model with the necessary value of the parameter. For example, for twisting metalware, the devices with a rotation speed of 1000-1300 rpm are suitable., and for drilling. 2000-3000 rpm.
Geometric parameters and dimensions should be consistent with the conditions of use and the nature of the use of an electric screwdriver. So, to work in hard-to-reach conditions. on the ceiling, roofs and so on a light and compact device is suitable, even if it loses in some parameters to more equipped models. On the contrary, for work in the workshop in the same position can be used and more oversized and heavy counterparts, but with greater functionality.
In order to determine which electric electric screwdriver is best suited for specific conditions of use, it is necessary to consider the following varieties of this part of it:
- Key. Accessories can be changed with a special key. This significantly increases the strength and secure hold of the bit or drill, and makes it possible to work in harsher conditions, but takes a lot of effort and time.
- Quick-clamp. The tool is clamped in one operation, which makes operation of the device much easier. However, this type of device can only be used for light-duty work.
- For bits. This variety allows only bits, not drills, to be installed. The fastener is characterized by reliability, but it is limited in application.
In the home, the first two variants are equally effective.
Modern electric screwdriver can be used not only for screwing screws. It can be used as a drill and also as a torch. Some units are additionally equipped with a battery for autonomous use.
An electric screwdriver must have the necessary set of functions to perform the planned operations Source vyborok.com
Comparison of mains and cordless model
In comparison with cordless models, the mains models have the following advantages:
- Excellent power stability. The device, powered from the domestic network, shows stable characteristics of work. On the contrary, in the case of battery-powered models, they gradually decrease as the batteries are discharged.
- The possibility of screwing in long metal. Most cordless models are designed to work with screws not exceeding 70 mm. At the same time, the best network screwdrivers in this parameter quite cope with fasteners of maximum length, subject to the value of the torque of 40 Nm.
- Operation at minus temperatures. The mains models have only general limitations on operation in freezing temperatures, while their lithium-ion battery-based counterparts do not have such a possibility at all.
- Operating time. The mains-powered models are able to run as long as their technical lifetime allows. Battery packs discharge quickly and do not show optimum performance for more than 1-1.5 hours.
- Weight and dimensions. The cordless model is as light and compact as possible, the cordless model is even heavier and more bulky because of the battery module.
- Operation in the open air. With a 220 V electric screwdriver you can work outdoors at any time of the year, as long as the supply cable is long enough. the battery models have this option only in warm weather.
- Cost. Mains models have a lower average price than cordless models.
the battery powered cordless screwdriver is characterized by mobility and independence from the energy supply, while the mains powered one is light, compact, more powerful, less expensive and can be used in cold places.
Recommendation! The screwdriver with a key chuck mechanism is best for domestic use and the one with a quick-clamping chuck for professional or private use.
Professional tools are selected according to power, torque, rotational speed, battery capacity, and, of course, ergonomics. Such a tool must withstand a heavy load during a long work shift.
Bosch GSR 18 V-EC
The impact-less electric drill is equipped with a brushless motor with a torque of 60 Nm. The electronic speed control makes it easy for the craftsman. Drilling diameter in metal is 13 mm, in wood. 38 mm. Precision coupling protects from peak loads and reduces vibration at the same time.
Advantages noted by users:
- Reliable spindle lock;
- well-designed overload protection system;
- quick battery charge time;
- The presence of a functional clutch.
Unfortunately, this screwdriver does not have the highest rotational speed (1900 rpm) and has battery contact problems. Otherwise, this is another successful model from Bosch.