How to choose a good electric screwdriver for your home, what to pay attention to
Minimum torque. 8 Nm, maximum. 200 Nm. Standard value for household devices is 8-45 Nm, for professional devices. 100-130 Nm. It is necessary to take it into account, it is the torque that determines the force with which the shaft, materials, fasteners, with which you can work without excessive effort and without the risk of overheating the electric screwdriver. The greater the torque indicator, the higher the power of the tool.
For example, a household device at 18 Nm is enough to screw 7-centimeter screws into the wood, and a professional one, at 165 Nm. for 12.5 cm screws with a diameter of 2.2 cm. It is good if there is a regulator on the body, which allows you to adjust the torque.
This parameter indicates the number of revolutions of the shaft with a fixed nozzle in a certain time unit. When working with fasteners, you need a value of 500 revolutions per minute, when drilling. 1000 or more, depending on the density of the base. the characteristics can be changed by adjusting the speed, the more speeds available the better.
Modern screwdrivers are equipped with special gears that allow operation at reduced speed with constant torque. It is also possible to adjust the speed of the electric motor.
Earlier we have already considered:
Battery voltage: what it affects?
It is a common opinion that the power and torque increase with an increase in this parameter. However, there is an important nuance. Many devices have voltages from 3 to 36.
If you compare two electric screwdrivers of different voltages, for example, 14.4 and 18, they are characterized by the same torque, 70 Nm. The difference lies in the construction of the battery, the number of components is different. The 18 volt model has more components, so it is more capacitive.
In general, the voltage is not critical, it should not be the basis of choice, in addition, it greatly affects the price.
Battery capacity: what does it mean??
Lithium-ion are the most popular, because they are cheap to produce and quite reliable. They have a short charging time, are lightweight and do not require a complete discharge. Prone to discharging in the cold. An electric screwdriver with such a battery is the best option.
Nickel-cadmium ones are less common. Their biggest disadvantage is the so-called memory effect. This causes loss of battery capacity when recharging.
The nickel-metal hydride ones are much like the nickel-cadmium ones. The main difference is the absence of toxic cadmium compounds. They have a shorter life span but a much lower memory effect. Nowadays almost no screwdrivers are made with such batteries
Characteristics indicate how long the tool can be used without recharging. Models for domestic use only hardly need an expensive lithium-ion battery, because you can easily recharge it if necessary. These models have a capacity of 1.5-2 Ah, professional analogues have one and a half to two times more. You should pay attention not only to the capacity, but also to the speed of charging, which varies from a couple of hours to half a day. Some professional versions support a quick-charge feature, in as little as an hour or even 30 minutes, but they cost substantially more than standard equipment.
Is there a real need for a case??
Yes, there is. Trying to save money on this accessory often leads to an expensive electric screwdriver fails early.
The case is the best protection against shock loads, dust ingress, allows you to keep at hand the main tool, a set of accessories, and a battery charger with a set of batteries.
How many batteries do you need to work?
The battery is one of the most technologically advanced and therefore the most expensive component in the kit. Not surprisingly, many people strive to save money, looking for a device with a single battery. This is a mistake.
It often happens that the battery is already discharged, but the work is not completed until the end, you have to stop and wait for a few hours. It’s better to overpay, but keep at least one spare battery handy.
Brushless screwdrivers: advantages and disadvantages
Brushless electric screwdriver has a motor without a collector and brush unit. Its advantages are as follows:
- Efficiency of almost 90%, compared to 60% of standard counterparts;
- Rapid achievement of the rated speed of the motor;
- Increased torque and power without increasing the size and weight;
- Maximum energy efficiency. This is due to the absence of losses in the collector and brush assembly. On average, energy consumption is 35 percent more efficient;
- The motor does not produce sparks, so it is possible to work in conditions of high detonation danger;
- High degree of fault tolerance. Electronic components eliminate the possibility of overloading the device, while the collector analogue can be accidentally “burnt out”.
Unfortunately we couldn’t avoid the following disadvantages. The main disadvantage. overpriced. The design is based on a BLDC electronic board, which is a very expensive component. The second drawback is the low maintainability. Because of the high cost and the design features of the internal modules, their replacement is impossible and impractical, if the motor breaks, it is better to buy a new tool.
In fact, for home use there is no point in a brushless electric screwdriver. For the home is quite enough and brush!
In addition to the basic technical characteristics, the screwdriver must be safe and comfortable to use. The body, the handle of the device, the main buttons should be so comfortable that a person could use it with one hand. Some models allow you to work in poorly lit places, thanks to the built-in backlight.
It is advisable to hold the electric screwdriver in your hand and compare it to another electric screwdriver before buying. Check that your hand does not slip and that the trigger is easy to pull. Is the tool well balanced? Weight is not the least of the considerations. The lighter, the more comfortable.
Types of screwdrivers. the difference between the drill
Before you pick up a screwdriver for the home, you should understand its differences from the electric drill.
Screwdrivers are electric powered tools. It is executed in two variants:
It differs in compactness, low weight, convenience in work, the obligatory presence of reverse. The principle of operation is the same as in drills and their analogues: providing rotary motion to the chuck with a working tool clamped in it. But the screwdriver has some fundamental differences from the drill:
- The screwdriver has 3-6 times less chuck rotation speed because 300-500 rpm is enough for twisting and unscrewing screws (a drill has 1500-3000 rpm and higher).
- A special safety device automatically cuts the screwdriver off when a certain adjustable torque is reached. The drill has no such mechanism.
- The drill has two operating modes. drilling and drilling with impact. The screwdriver has only one working mode.
- To work with a drill, in terms of safety engineering, is much more dangerous. Therefore, protective goggles are required to prevent dust and small particles, which are abundant during the operation of the drill, from getting into your eyes. There is almost no dirt and no need for protective equipment when working with a screwdriver.
How the tool is built?
By design, the screwdriver is similar to a drill, it consists of:
- DC motor (cordless version) or AC motor
- planetary gears and chuck speed regulator;
- An overload protection mechanism;
- quick-action chuck.
Also included with a cordless screwdriver are batteries and a battery charger.
Many manufacturers include one or two batteries. It is recommended to pay attention to this when choosing a cordless screwdriver for repair. One battery is installed in the tool, the second battery is on charge. The work will not be interrupted by a dead battery.
Best Screwdriver Brand? (14 BRANDS) Milwaukee, Dewalt, Makita, Ryobi, Bosch, Pink Power, Metabo
What types of screwdrivers are there??
This tool comes in different modifications, which can be classified as follows:
- Cordless screwdriver. Designed only for working with fasteners such as screws, screws, self-tapping screws. Widely used on assembly lines.
- Screwdriver. Designed for work with bolts and nuts, used in assembly lines, car repair shops and other industries.
- Impact drill. Designed for drilling, there is a low-speed mode for tightening and unscrewing screwdriver fasteners.
- Screwdriver. Used for fasteners with Phillips head and small-diameter drill holes in wood, plastics, nonferrous metals, and other soft materials.
No special skills are required to use a screwdriver. Even small children can easily tighten or unscrew screws if they are shown how to do it correctly. As soon as a screwdriver appears among the household tools, the need for nails and a hammer is immediately reduced. Particularly popular are battery powered models. They do not need mains electricity, so they are mobile, self-contained, independent.
Corded wrenches are used mainly by professionals: construction or installation workers. They are indispensable where there is a large amount of work for them and the ability to connect to the electric network. The most successful variant of such a networked tool is a screwdriver, which combines the functions of a drill and screwdriver. For home use, networked models of screwdrivers are rarely used, because they are designed for continuous, long-term work, and are quite expensive.
All wrenches are divided into two groups: professional and household. The main differences lie in the price, the capabilities of the tool and the duration of continuous operation. Professional models are more robust, but not as functional, have more powerful batteries that require recharging much less often. Professional tools are made of durable materials, are of high quality and are designed to work in “spartan” conditions. It has a higher torque than an ordinary screwdriver and can therefore drive screws into stronger and tougher materials.
Household screwdrivers are more versatile. They are more compact, lighter, chuck rotation speed does not exceed 500 rpm.
When choosing an electric screwdriver for your home, take a closer look at household tools. Don’t overpay for extra reliability.
The type of battery in a screwdriver is an important criterion when choosing a screwdriver. What type of battery to choose from determines the durability of the tool and its cost. Modern models are available with three types of batteries:
Nickel-cadmium batteries, though considered obsolete, are still popular in household models of wrenches. They have three advantages: low price, resistance to sub-zero temperatures, the ability to recover from a fully discharged state. The disadvantages are much more:
- significant size and weight;
- Not very long durability (about a thousand charge/discharge cycles);
- small specific capacity (not more than 2 Ah);
- the presence of the “memory effect” requires charging the battery only after it is 100% discharged (otherwise the capacity will be reduced by the amount of underdischarge);
- the ability to discharge quickly even at rest;
- environmental hazard.
In nickel-metal hydride batteries some disadvantages of the previous type are corrected or minimized. They are environmentally friendly, compact, have less “memory effect”, a fairly decent specific capacity. The disadvantages include:
- frailty (only about 500 charge/discharge cycles);
- higher cost in comparison with NiCd batteries;
- inability to charge a 100% discharged battery.
Nickel-metal hydride batteries are also used in household models of screwdrivers. Home handymen appreciate nickel-metal hydride batteries for the ability to restore their performance at home. This can be done by hand, soldering new cells, or restore the capacity with a modern intelligent charger.
Lithium-ion batteries have been developed taking into account the shortcomings of the previous types. True, they are rather capricious to the modes of charging and discharging, but this drawback is easily eliminated by using modern chargers. This type of batteries is mainly used in professional models of screwdrivers. Such batteries are expensive, fastidious in maintenance, but have a high specific capacity, allowing to develop a significant torque. Their main disadvantages are high price, short life, poor adaptability to low temperatures.
The brushless screwdrivers and drills are increasingly available in a wide range of cordless screwdrivers and drills. Should you stop your choice on these electric screwdrivers?
Brushless electric motor for a screwdriver
Cordless electric screwdrivers use two types of DC motors:
How to Select and Use a Drill/Driver | Ask This Old House
The first type requires periodic maintenance: brushes rub against the collector contacts and wear out, after a couple of years of intensive work they have to be replaced. Collector motor makes noise, sparks and radio interference.
A brushless motor is smooth in operation, compact and less noisy. It also has other advantages: high power and reliability, the device requires almost no maintenance. Disadvantage: the complicated electronic circuit on the basis of a microcontroller can not be repaired by yourself.
Although electronic circuits are getting cheaper, brushless screwdrivers are twice as expensive as traditional tools. We recommend choosing a brushless screwdriver only if you know what you need it for.
How to choose a screwdriver for home use
There are many companies manufacturing screwdrivers. For home and garden use the non-professional models from Bosch, DeWALT, Hitachi, Makita. There is no need to overpay for a device that can work for days without loss of efficiency, if you need to screw in a few screws once a month.
Parameters of the battery
When choosing a battery-powered screwdriver, it is important to study the battery’s parameters. To how long the tool is able to work without recharging, significantly affects the work process.
The battery cells are connected in series and in parallel. As a result, the battery receives certain properties. The most popular battery voltages are 12 V (15% of devices); 14.4 V (25% of devices) and 18 V (45% of devices), other voltages from 3.6 to 36 V for the remaining 15% of devices. In general, the higher the voltage, the more powerful the tool.
How long the screwdriver will work depends on the capacity of the battery, which is measured in ampere hours. Tools with a capacity of more than 3.0 ampere-hours refers to professional. Hardly suitable for domestic use.
The number of revolutions per minute determines the material that the craftsman is able to work with.
15-30 Nm is quite acceptable for a tool that will be used at home. A self-tapping screw with a length of 10 cm can easily be driven into pine with this type of screwdriver. If you plan to work with denser materials or with larger screws, you can buy a model with a torque of up to 50 Nm.
Number of revolutions per minute should be limited when working with different materials. Too much torque on a screw in a soft material will simply spoil the workpiece. On all screwdrivers you can find the adjusting ring that is near the chuck. The ratchet sound determines the moment when the self-tapping screw is screwed all the way in. the master, having heard it, can release the power button.
this is an extra advantage when pulling the drill out of the hole. A speed limiter prevents the tool from dropping during this process.
To screw the screw into a solid wood without any problems, it is better to pre-drill a hole in the rock.
The tools that work in drilling and screwing mode have a special speed switch. the optimum rotation speed when screwing in is between 0 and 400-500 rpm. For a drill the number of revolutions can be increased to 1300-1500.
Do not forget to switch between screwdriver and drill bit when working with one device. excessively high torque screwing leads to heating of the self-tapping screw and the wood can even catch fire. И
Cordless screwdriver drill. what to look for when choosing a tool?
Too much power will cause the screw to break, which most often results in complete damage to the workpiece.
Modern screwdrivers have a universal chuck design. In order to be able to unscrew screws with the tool it must be able to reverse rotation. When the drill bit gets stuck in the rock, it’s easy to get it out.
How to choose an electric screwdriver
An electric screwdriver is a multipurpose power tool used for driving fasteners and drilling in soft materials such as wood, plastic, drywall, thin sheet metal, etc. An unusual application of an electric screwdriver is drilling holes in the ice during winter fishing and mixing not very dense building mixes.
Electric screwdriver is considered a multi-purpose tool, because it is used in different types of work: repair, finishing, grinding surfaces, assembling furniture and various structures, working with drywall, wood, etc. The device can be used both indoors (in an apartment, cottage, garage) and outdoors.
The design of any electric screwdriver is the same: an electric motor with a gear that transmits rotation to the spindle and tooling, a chuck of a certain type and an electronic control system. There is also a clutch to regulate the torque, and a rechargeable battery (in cordless models) which supplies power to the tool. Choosing the right tool for your needs should be approached thoroughly. What electric screwdriver to buy for home or professional use, prompts our article.
Overview of popular screwdriver manufacturers
In the question of which electric screwdriver to choose to work at home or at the facility, an important role is played by the manufacturer and brand name of the equipment. As a rule, users want to buy a tool of a well-known and already proven brand and not to overpay for quality. The choice of the best brands was influenced by the reviews of real users.
Bosch is a German brand that produces equipment of high quality and reliability, proven for several generations. All models are equipped with durable, high-torque motors. The tool classes are divided by color: household tools in green, professional tools in blue. The range includes both cordless and corded models.
Makita. Japanese brand of professional equipment for construction and repair work. One of the favorites, along with Bosch, among craftsmen and ordinary users. The products are distinguished by their good power, long service life and reliability.
DeWALT is an American brand that is considered one of the best in the screwdriver line. The equipment is multifunctional, with a quality and powerful engine and safe use due to reduced vibration. Product line includes both cordless and cordless screwdrivers. Actively used in the professional construction sector.
“Interskol”. domestic brand of electrical equipment, produces a budget line of screwdrivers and other tools for construction and repair. Inexpensive models are versatile and productive enough to handle loads well. Interskol equipment is mainly used for household repairs or as a replacement tool for a professional one. In the catalog there are mains and cordless variants with 1 or 2 batteries.
STANLEY is an old brand of construction equipment, there is a professional and amateur line. New technologies are used in production and technical properties of the tool are improved each time. High class quality and ease of use long appreciated by users around the world.
PATRIOT is another American manufacturer of power tools and various special equipment in the segment of affordable products. Even the professional models have a relatively low price compared to other well-known brands. In the tools used quite strong and reliable motors that can withstand considerable loads.
Metabo. a well-known German brand of special equipment in the company’s dark green housing. Wide range of cordless and cordless screwdrivers. In cordless tools uses the most powerful LiHD technology (from 4 to 8 Ah), which ensures high-power operation for a very long time.
Domestic and professional wrenches
Before you choose an electric screwdriver drill of this or that model, you need to determine the scope of work. If you need a tool for constant work for a few hours you’d better pay attention to the professional version, and for small household works (hang a shelf, assemble new furniture) you can buy an inexpensive household version.
Used for screwing screws, bolts and screws. Has a modest technical indicators: low torque, relatively low battery capacity, but affordable. Used for minor repairs at home or as a replacement tool in addition to the basic tool.
productive and powerful. They tighten fasteners and can drill holes in wood, plastic, thin and soft metal. Usually have a 2 or 3 speed gearbox for optimal working conditions, the torque of these models reaches values of 130 N∙m. Usually has a quick change system for accessories (bits). Also professional models may contain a brushless motor, which has a higher efficiency and smaller size. expensive in comparison with a household one, but pays for itself through constant operation.
Corded and cordless electric screwdriver
All wrenches work with electricity, the only difference is in its source: network models receive power from the mains through a cable and outlet. Cordless models have a removable rechargeable battery that is charged from a DC power source (also through the socket).
Choosing an electric screwdriver is not an easy process. Because this tool is presented in the market in a huge range. First, it should be noted that its basic configuration is the pistol configuration. And this is the only criterion that is the same for all models. Accordingly the same is in the inside of the tool. The body is made either of shockproof plastic, or in the form of an all-metal.
There is one more indispensable element in each electric screwdriver, it is a ratchet, also a torque limiting mechanism. That is, if the load limit of the tool exceeds the required parameters, a characteristic sound is emitted, indicating that the work should be stopped.
So, what to look for when choosing a power screwdriver for your home.
Cordless or mains-powered
After deciding on the class, you have to decide whether you want a corded or cordless electric screwdriver. The disadvantages and advantages of both are obvious: The cordless has better mobility and the cord does not interfere with the work, but it weighs more. The cordless does not depend on the availability of battery power, but not all construction sites have electricity. Generally speaking, the choice is not an easy one. The decisive moment may be the fact that a cordless electric screwdriver with a good battery is a lot more expensive than a similar model working from the network. The difference is formed due to the presence of the battery good options are not cheap.
With a cordless electric screwdriver, the length of the cord is important
If you choose a cordless electric screwdriver, pay attention to the length of the cord. The longer it is, the more convenient it will be to work without having to lug a carry more.
In order to choose the right cordless electric screwdriver, you need to pay attention to the type of battery. This determines how long it will last on a single charge, as well as the order in which it is stored.
Lithium-ion (Li-lon). Holds a charge for a long time, charges quickly, has a large number of recharges, hardly discharges in storage. In general, a good option, but expensive. That’s probably why it is more common on professional models, where the duration of work on a single charge is important. The disadvantages may include the fear of cold, which in our country is important.
So, if you choose a cordless electric screwdriver for intermittent work is good enough and the nickel-cadmium battery. If used carefully, it lasts a long time. If you start large-scale work, it is better to use a different battery less downtime, the work will move faster.
Cordless or cordless
As mentioned above, electric screwdrivers are divided into two large groups: those working from the mains and those that function with the help of rechargeable batteries.
In order to settle on one of the options it is necessary to clarify the difference between them:
The popularity of cordless professional and household screwdrivers is due to their ergonomic design, quality and independence in operation. In view of the high demand, it is worth dwelling on these models and considering the types of batteries used.
Before you choose an electric screwdriver for the house, garage and cottage, it is worth deciding on the source of its power. The mains models use the usual household network, while the devices on batteries. are equipped with a removable battery. Each type has its own pros and cons.
Cordless electric screwdrivers are good for their autonomy. It is conditionally independent from the socket and can be used even in the open field. This expands the scope of such a tool. But the battery pack also has limitations.
The first is the limited operating time. Usually enough charge for a hundred or two self-tapping screws, but in difficult conditions, the battery life is reduced. The second disadvantage. limited power (torque).
It may not be sufficient to work with hard and durable materials. There are positive exceptions, like a professional Makita DTD146Z, but they do not come cheap.
However, away from the socket with an electric screwdriver, you can work only if you have a long carry or a generator. Here too there are exceptions, but unpleasant: the cheapest Chinese models are not more powerful than their cordless counterparts, but they are also not autonomous. The minimum acceptable choice is something like the Dnepr DE-850.
What to choose an electric screwdriver. cordless or corded. depends on the needs and intended conditions of use. If the tool will not be used outside the house, apartment, garage or other premises. the mains type is better. It is cheaper with equal power, lighter, and ready to use anywhere with an outlet at any time.
Cordless electric screwdrivers are optimal for outdoor use, including outside populated areas. It is desirable to choose models with a high-capacity battery, not less than 2 Ah.
What type of battery to choose
The undeniable advantage of this type of batteries is their low cost. Ni-Cd batteries are most often used by manufacturers in creating budget ranges of power tools. Another advantage is the five-year warranty period, which exceeds the standard one by 2 years.
They are environmentally friendly and are increasingly being used for high-end cordless tools. The dimensions and low weight of the batteries make the tool itself much lighter and more convenient. Perhaps the only drawback of Ni-Mn batteries is the high cost.
These batteries are considered the best for mobile power tools. They hold a long charge, charge very quickly, and they also have no charge memory effect. The only disadvantage of Li-Ion batteries is considered a high cost.
When choosing an efficient electric screwdriver with a battery, you need to pay careful attention to its characteristics, because the cost of the battery is half the cost of the entire tool:
a cordless electric screwdriver, the price of which depends on the type of battery and other characteristics important for high-class work of any complexity. a sought-after tool in every home.
Power and torque
The second thing to consider before choosing an electric screwdriver is its power and torque. Very often salespeople specify the power, but do not specify the torque of the model and are silent about the power of cordless tools.
Power is quite simple: 600-800 watts is more than enough for non-professional (home) use, if you do not have to drill a lot. But the torque is worth a closer look.
In order to screw small screws (up to 50 mm) into not very hard wood, any electric screwdriver is enough. However, to work with hard wood, you need a torque of at least about 15 Nm. For longer screws and self-tapping screws you need 20-30 Nm, and models with 40 Nm and more can cope with tightening “hundredths” in a solid bar.
The rotational speed is not the most important parameter for a domestic electric screwdriver. The tools are equipped with a reduction gear that converts high speeds on the motor shaft to low speeds on the chuck.
A couple of hundred rpm is quite enough for screwing in, but a high rotational speed can lead to bits falling off. This leads to both premature wear of the nozzles and slipping of the head slot of the screwdriver.
Before you choose an electric screwdriver with drill functions, you still need to pay attention to the rpm. When working in hard materials they are never short. 1000 rpm is the minimum suitable for wood and similar hard materials, but for metal 3000 rpm won’t hurt.
Type of chuck
Another thing to consider to decide which electric screwdriver to choose is the type of chuck. A universal solution is the quick-action chuck, in which the bit is fixed by rotating the ring.
Hex chuck is good to have in the bit chuck because it reduces the weight of the tool and also allows you to quickly change bits. They are retained in the chuck by a special carrier or magnet and can be removed with little effort. However, it is impossible to insert a drill bit into such a chuck.
There are exceptions. these are models that are also equipped with a removable quick-action chuck. They are the most universal because they are also easier to torque screws and can be used for other applications.
This parameter is measured in newton-meters (N-m). It shows how much force the tool is capable of: how thick the screw and how deep it can screw. Most screwdrivers have a torque range of 10-50 N-m, although it could be higher.
There are different types of torque (soft, hard, maximum, continuous), and the manufacturers do not always indicate a specific one, so you can focus on this parameter only in conjunction with other characteristics.
- High power.
- Metal gear case.
- Maximum time of continuous use.
Main disadvantage. no possibility to use drill bits, because the chuck is designed only for bits.
Impact type model. Drive power. 1050 W. Maximum rpm is 2,000, and the number of blows is up to 36,000./min.
- High power.
- Extended functionality.
- Smooth speed controller.
- Ergonomics, easy-to-use.
The expressed disadvantages of the tool does not show.