What Is An Impact Screwdriver For?

Design

According to the principle of power supply, power tools are battery and mains, operating at a voltage of 220 V. Despite these differences, the tools are similar in appearance and internal structure. They consist of the following parts:

  • Plastic or metal case.
  • Clamping chuck for various accessories.
  • On / off buttons.
  • Reverse switch, allowing you to adjust the screwing in and out of fasteners.
  • Speed ​​regulator that controls engine speed.
  • Switch-on locks.
  • Tightening force adjustment switch.

Inside the housing there is an electric motor with a board and a capacitor, a clutch and a gearbox.

Technical specifications

To know why you need a screwdriver, and how to use it, you should first find out its technical characteristics. The most important tool parameters are:

  • Torque. Indicates the force developed by the tool during rotation. Helps to determine the maximum screw-in size or diameter when drilling various parts.
  • Speed ​​- the lower the spindle speed, the more dense the material can be drilled. At reduced speeds, a larger diameter hole can be obtained.
  • Chuck type. there are key, with a hex shank and quick-release.
  • Weight. The heavier power tool is more powerful and is more commonly used as a drill when working with higher density materials. For screwing or unscrewing screws and screws, models with a lower weight are used.
  • Impact function. used when working with concrete or brick walls.
  • Pulse mode. used for “stubborn” fasteners.

What is a screwdriver for and how is it used

Men often ask the question of what a screwdriver is needed for and whether it is necessary to buy one for use at home. To give an answer, you first need to consider its functionality, determine how it differs from an electric drill.

What is a screwdriver for and what tasks it performs

Maintaining comfortable living conditions in a house or apartment means constantly making small repairs. Power tools make work easier. The screwdriver became one of these “assistants”. He copes with such common tasks:

  • Installation work with self-tapping screws, screws, screws.
  • Drilling holes in walls, doors, furniture.
  • Installing or removing fasteners (dowels or anchors).

Types of screwdrivers by battery type

Devices operating autonomously have different types of batteries. They are:

  • Lithium-ion. their advantages include good capacity, low self-discharge. They charge fast enough. The main disadvantage is poor resistance to high temperatures.
  • Nickel-cadmium. well adapted to work at any temperature, the number of charging cycles reaches 1000, they are discharged with a high current. Disadvantages. heavy weight, “memory effect”. They harm the environment.
  • Nickel-metal hydride. environmentally friendly. Lighter than nickel cadmium, minimal memory effect. Of the minuses. intolerance to low temperatures, a double reduction in the number of recharges (up to 500).

You can also note the division of batteries by battery capacity and operating voltage.

Types of screwdrivers by appointment

There are household and professional tools:

  • The former are used when working with soft and pliable materials. plasterboard or wood. With their help, home furniture is repaired, shelves are fixed, windows and doors are repaired.
  • powerful, professional, power tools are needed for drilling in materials of increased hardness and density. They have higher rotational speed (up to 1300 rpm) and increased torque (this makes them more powerful).

Screwdrivers are also divided by type of power supply:

  • Network. power supply 220V.
  • Rechargeable. autonomous power supply.

How to choose a device

To choose a screwdriver, you first need to familiarize yourself with what this type of tool is used for. for professional or domestic purposes, what work can be done with it.

Someone relies on knowledge of the technical characteristics of the device when buying, someone prefers to hear the advice of the seller. Some pay attention to a well-known brand, use advice from the World Wide Web. Personal experience, professional advice, knowledge of the technical parameters of devices will help you choose a screwdriver, which will become an indispensable assistant in household chores.

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How to choose?

When choosing a particular model of impact screwdriver, pay attention to the smallest details. The first thing that people usually pay attention to is the type of food. Pneumatic models will definitely not be needed at home, but electric models are network and battery, as mentioned above.

The network option is good for working in an equipped room, it is most appreciated for its almost unlimited power. Having given preference to just such a device, evaluate its cable. it must have a significant length and thickness, have good insulation and not raise doubts about the strength of the place where it enters the unit.

In the case of the battery model, there are more selection criteria. First of all, you need to find a balance between a large battery capacity, which extends battery life, and the weight of the device, because a capacious battery always weighs quite a lot.

Another point is the choice of the type of battery: today, the most common lithium ion models, but nickel-cadmium are also found. The first ones are good with a small mass with a significant capacity, they allow charging at any time, but they are more expensive than the main competitor and can wear out quickly at low temperatures. The advantages of the nickel-cadmium solution completely neutralize the disadvantages of the lithium-ion version. such a battery is cheaper and not afraid of frost, but it is heavy and environmentally hazardous, and most importantly, it must be completely discharged and then fully charged, otherwise the “memory effect” will provoke rapid wear of the carrier.

At high voltage, the engine power also increases, but for home use, sky-high rates are not needed: 500-700 W is enough, otherwise the tool will be heavy and unreasonably expensive.

Screwdriver chucks, in which replaceable nozzles are attached, are quick-clamping and key. The first can be organized in different ways, but its advantage is that maintenance can be performed with bare hands. The key cartridge has a characteristic rim; a special key is needed to maintain it, which is not always convenient.

Since we are talking about the cartridge, an important criterion is the maximum diameter of its opening. the larger it is, the more different nozzles can be used.

Maximum torque is a measure of how hard the tip will rotate. This indicator does not always directly depend on the power of the motor, sometimes it can be increased due to the gearbox, but it is always desirable that the maximum torque is rather high. Models with continuously variable torque control are in priority, since they are more sparing for fasteners and surfaces that are drilled.

Distinctive features

When deciding whether to choose an impact or a shockless model of a screwdriver, first you need to figure out how they differ.

Many consumers who have managed to evaluate the work of the striking mechanism will say that such a unit is better, and that is how they are ready to substantiate their point of view.

  • Directed impacts increase the torque of the impact tool to a range of 80-250 N / m, making it possible to break through the most difficult obstacles. It is significant that in the process there is even no need to firmly press the case against the wall. the tool bites into it even without significant pressing.
  • Without the need for constant physical effort applied to the tool, the wrist and hand of the master are much less tired, which allows you to increase the same productivity.
  • Considering that even a solid wall is not able to successfully withstand the onslaught of such a tool, it usually does not deform the fasteners, which will allow it to be removed without additional efforts in the future. over, many models also provide for the reverse function of removing old fasteners from the walls, and even the fact that due to long-term use it has experienced strong deformation.
  • The screwdriver works not only with bolts, but also with nuts, in each case achieving the most tight tightening. A “smart” car usually automatically switches from shockless to shock mode when it senses that the nut has become tighter at a certain moment.

Unfortunately, such a solution also has certain drawbacks, which may never allow it to completely supplant unstressed models. Thus, an impressive twisting speed is observed only in the shockless mode; when switching to impacts, it significantly decreases.

Chucks for such a tool are not suitable for any. you need strictly hex. Most models do not have a limiting sleeve, so the degree of twisting must be carefully monitored by the operator, otherwise damage to the wall or parts will not be done. Finally, at high speeds, such a unit is capable of producing deafening construction noise, therefore constant work with it requires the mandatory use of protective equipment.

Impact screwdriver and its advantages

  • Large amount of torque, in some models reaching 250 Nm.
  • Convenient when tightening screws and screws. With a low resistance level, the tool is able to work in a shock-free mode, developing a continuous force required for twisting. If the resistance increases, the tool switches to impact mode when tightening with a high torque.
  • There is no need for large pressing forces, which saves the surface of the screw heads from “licking”. This feature of the tool makes it possible to unscrew the screws, the head of which has already begun to bulge.
  • Reduces the amount of torque on the user’s wrist.
READ  How to Remove Tile from a Wall Without a Punch

Disadvantages of Impact Screwdrivers

With a rather extensive list of advantages, impact screwdrivers are not devoid of disadvantages, the main ones of which should be attributed:

  • Low twisting speed in case of transition to shock mode.
  • Impossibility to use jaw chucks, except in rare cases. Percussion tools almost always have hexagons.
  • Inability to install a torque limiting clutch. For this reason, control over the entire process is entrusted to the worker, which can be quite inconvenient, since the tool shaft rotates at a very high speed.
  • Increased noise level when using shock mode.

What is it and what is it for?

An impact screwdriver is a special power tool that allows you to most effectively drill walls in order to drive screws and install other fasteners. Unlike bumpless models, this relative novelty in the domestic market makes a hole not only due to the rotation itself, but also with the help of directed blows. The latter usually do not have a permanent character. the corresponding mode is turned on at the request of the operator, or automatically if the drill comes across an obstacle of particular hardness. In a way, it’s a little jackhammer.

Impact screwdriver. the device itself is more complex and “smart”, so a certain versatility should not be surprising. This means that the tool, as a rule, is fully compatible with various attachments, due to which the scope of its potential application significantly expands. instead of a drill, you can attach, for example, a hole saw or a mixing attachment.

It is logical that such a tool is somewhat more expensive than non-impact models, but its purchase is often justified even at home. the outer, load-bearing walls of multi-storey buildings are usually distinguished by the highest strength, which only an impact screwdriver can overcome.

The device is also appreciated by professionals who drill walls or various parts on a daily basis. according to them, for all its assertiveness, the drill of an impact screwdriver usually does not cause significant damage to fasteners, increasing their durability. This characteristic is especially valuable in the context that the same tool is often used to assemble furniture.

The classification of impact screwdrivers is not so extensive, but it can still drive many inexperienced consumers into a dead end. The logic of dividing tools into drills, screwdrivers and screwdrivers confuses most of all, but in fact everything is extremely simple here: the mechanism is generally the same for everyone, and the exact name depends on the nozzle.

So, a drill is usually equipped with a drill for making holes, and a screwdriver and a screwdriver at the same time know how to screw in fasteners. Some models imply a simple replacement of nozzles, therefore they can have complex compound names like “screwdriver-drill”, if such multifunctionality is not provided, the unit is called the most accurate term.

Often, when choosing, beginners are also confused by the fact that the device is supposedly electric and pneumatic. Electric models are the most common, especially at home, but pneumatic ones are perhaps very rare models that will definitely not be in demand at home, the main places of their use are various service stations and tire fitting enterprises.

Since the screwdriver is powered by electricity, it is impossible not to clarify that it can be both mains and battery. The first one is good for small home repairs or daily work in a well-equipped workshop, because it is lighter, and the master does not need to constantly remember to charge the battery.

However, it is the battery version that is the only solution during the construction process or for use on the street when the working site does not imply the presence of functioning outlets.

Why do you need an impact screwdriver

Greater torque with less pressure on the tool by the operator.

Many often ask the question, what are the advantages and differences of an impact screwdriver (nutrunner) from a conventional one and who and why needs this tool? And here it is important not to confuse an impact drill with an impact screwdriver, which is sometimes more correctly called a wrench. An impact driver or wrench has a tangential impact (in a plane perpendicular to the axis of rotation), i.e. The effort to tighten the screws or nuts is not applied continuously, but with a high-frequency series of small blows, as if you put an open-end wrench on the nut and started tapping it with a hammer. The total applied force is calculated as the sum of the efforts of these blows per unit of time.

Based on this, you can immediately emphasize the advantages and disadvantages of tools of this class.

How the cordless and cordless impact driver works

Electric impact screwdriver, whether it is mains or cordless, provides a tangential impact in a plane perpendicular to the axis of rotation. In other words, when tightening the screws, the force developed by the tool is not continuous, but is a high-frequency series of small blows. Its work is similar to what happens, for example, when putting an open-end wrench on a nut and tapping this wrench with a hammer.

The total force that a cordless or cordless screwdriver of this type develops is the sum of the efforts made by it impacts during a unit of time.

Externally, the impact screwdriver is very similar to its non-impact counterpart:

Conventional non-impact screwdriver

Disadvantages of Impact Screwdrivers (Impact Wrenches)

  • Low drilling speed when switching to hammer mode.
  • Inapplicability of jaw chucks (only hexagons) with rare exceptions.
  • Inapplicability of the torque limiting clutch, due to which the tightening process has to be controlled all the time independently, which is not always convenient at a high speed of rotation of the tool shaft.
  • Increased noise in shock mode.

And in order to more clearly represent the difference between an impact screwdriver (nutrunner) and a conventional one, we will summarize their main technical characteristics in one table:

One of the peculiar criteria for assessing the masculinity of the owner of the house is considered to be his ability to drive a nail (or, in a modern way, screw a screw) into the wall. Without this elementary skill, it will not be possible to hang a shelf, decorate a room with a picture, or install a curtain rod.

An electric screwdriver is called upon to cope with this task faster and without unnecessary effort, and the impact driver is especially often praised, but not everyone understands what it is and why.

Operating rules

The use of an impact screwdriver will be safe and as effective as possible only if done correctly. Obviously, the first tip is to read the instructions before use, but there are other sensible usage tips.

For example, if possible, do not expose the equipment to the maximum torque, because many fragile materials with a treated surface can simply be torn from this, and you will ruin the workpiece. In addition, working at maximum speeds up tool wear, not to mention the fact that in this mode you need to hold it tighter, otherwise it is even possible to get injured.

The modes of operation, by the way, are described in the instructions for a reason. each of them assumes optimal settings for performing this particular task, and for another it may not be suitable. So, drilling is needed to make holes, and the screwdriver mode is to screw in fasteners, when used, on the contrary, efficiency decreases, but the risk of injury increases.

Often, many people have a question, what is the better impact screwdriver in comparison with its shockless counterpart and is it better at all??

When evaluating the advantages that characterize an impact driver, it is important not to confuse with a tool such as an impact drill or cordless hammer drill, since the purpose of the screwdriver is clearly defined in its name.

Cordless impact drill

Probably, many have an idea of ​​what an impact drill is. A conventional drill is a tool designed to drill holes in tough materials. It can be manual, pneumatic or electric. Among home craftsmen, the most common device is with an electric drive. Today, these drills have the additional battery and impact capacity that should help or speed up the drilling of a hole in a stubborn wall. With the help of special nozzles, this electrical device can unscrew or tighten fasteners, which include bolts, nuts, screws or self-tapping screws. However, this is not easy to do as the machine torque is too high, even if the speed is set to low.

An impact drill has the same properties as a conventional drill, but has the ability to move the rotary body along its axis. This means that when drilling materials such as high-strength concrete, this function must be applied, and then the drill not only rotates the drill, but also makes a large number of hits with it.

Impact cordless screwdriver: what is it

A screwdriver is a handy electric tool that allows you to quickly unscrew and tighten bolts, nuts and screws. Modern screwdrivers are most often equipped with a battery, which makes it possible to use the device over the entire area without being tied to the length of the cord. These screwdrivers have the following advantages:

  • Small mass of the device, which makes it possible to easily hold it in one hand;
  • Low rotation speed, which allows you to unscrew the fasteners and not “lick” its notches;
  • The ability to adjust the torque. for more convenient screwing of fasteners of different sizes;
  • The presence of a reverse stroke. for unscrewing the fastening parts.
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The main disadvantages of cordless screwdrivers are reduced to one thing. This is a low power. up to 20 V for unscrewing a bolt or self-tapping screw firmly seated in the base. To solve this problem, an impact driver was developed. This tool has a higher power. up to 36 V. There are both mains and cordless versions. The principle of operation of such a device lies in the fact that when, for example, a self-tapping screw in a tree is jammed, the electrical device automatically exerts a shock load on the fasteners, loosening it. over, this happens not along the axis of the screw, but along the axis of rotation. The device stops, abruptly gives the instant maximum rotation speed to the fastener and lowers it to normal speed. The cycle of such operations is repeated until the self-tapping screw is unscrewed. As a rule, the impact screwdriver quickly copes with this problem.

Impact cordless drill / driver: general information

Hand tools are needed to solve the problems of fastening or dismantling, drilling holes or destroying old fragile plaster. For example, hammers, screwdrivers, pliers and punches, but it is better to use electrical appliances. These devices will save you time and energy, and will help you to accurately perform all the work. There are screwdrivers, impact drills, and screwdrivers. Which one is better for home or professional use??

Why you need a cordless impact screwdriver?

Compared to other rotary devices, the cordless impact driver has the following advantages:

  • High maximum torque;
  • Reduces the load on the hand of the master;
  • Does not require increased downforce;
  • Has the ability to drill holes;
  • Automatic transition from normal to shock mode;
  • Long battery life.

The disadvantages include the following:

  • No manual torque control;
  • The need to use special bits;
  • Drills holes in fragile substrates such as wood.

An impact driver is a versatile tool for any DIYer, often referred to as an impact drill driver. However, when purchasing it, it is not so easy to make the right choice. Before you pay money and take the screwdriver home, you need to analyze the device according to the following criteria:

  • Maximum battery life without network connection;
  • Li-Ion battery type;
  • Tool power, which ranges from 24 to 36 V;
  • Torque not less than 70 Nm;
  • Comfortable feeling;
  • Weight no more than 1 kg;
  • Proven brand (Bosch, Makita, Metabo).

Thus, we can say that an impact drill-screwdriver is an irreplaceable thing in the range of electrical appliances of any owner, as it easily twists and unscrews fasteners of any complexity. The device makes holes in sufficiently strong walls, works for a long time and does not strain the hand, but sits comfortably in it, unlike an impact drill, which is difficult to mount and dismantle fasteners. It is heavy and requires the use of both hands.

Distinctive features

When deciding whether to choose an impact or a shockless model of a screwdriver, first you need to figure out how they differ.

Many consumers who have managed to evaluate the work of the striking mechanism will say that such a unit is better, and that is how they are ready to substantiate their point of view.

  • Directed impacts increase the torque of the impact tool to a range of 80-250 N / m, making it possible to break through the most difficult obstacles. It is significant that in the process there is even no need to firmly press the case against the wall. the tool bites into it even without significant pressing.
  • Without the need for constant physical effort applied to the tool, the wrist and hand of the master are much less tired, which allows you to increase the same productivity.
  • Considering that even a solid wall is not able to successfully withstand the onslaught of such a tool, it usually does not deform the fasteners, which will allow it to be removed without additional efforts in the future. over, many models also provide for the reverse function of removing old fasteners from the walls, and even the fact that due to long-term use it has experienced strong deformation.
  • The screwdriver works not only with bolts, but also with nuts, in each case achieving the most tight tightening. A “smart” car usually automatically switches from shockless to shock mode when it senses that the nut has become tighter at a certain moment.

Unfortunately, such a solution also has certain drawbacks, which may never allow it to completely supplant unstressed models. Thus, an impressive twisting speed is observed only in the shockless mode; when switching to impacts, it significantly decreases.

Chucks for such a tool are not suitable for any. you need strictly hex. Most models do not have a limiting sleeve, so the degree of twisting must be carefully monitored by the operator, otherwise damage to the wall or parts will not be done. Finally, at high speeds, such a unit is capable of producing deafening construction noise, therefore constant work with it requires the mandatory use of protective equipment.

Operating rules

The use of an impact screwdriver will be safe and as effective as possible only if done correctly. Obviously, the first tip is to read the instructions before use, but there are other sensible usage tips.

For example, if possible, do not expose the equipment to the maximum torque, because many fragile materials with a treated surface can simply be torn from this, and you will ruin the workpiece. In addition, working at maximum speeds up tool wear, not to mention the fact that in this mode you need to hold it tighter, otherwise it is even possible to get injured.

The modes of operation, by the way, are described in the instructions for a reason. each of them assumes optimal settings for performing this particular task, and for another it may not be suitable. So, drilling is needed to make holes, and the screwdriver mode is to screw in fasteners, when used, on the contrary, efficiency decreases, but the risk of injury increases.

Always wear protective goggles and gloves, especially with delicate materials. When drilling walls, make sure there are no electrical wires in advance. Remember that the continuous operation of the device is limited. if the nozzle or any other unit is noticeably warm, let it cool.

By the way, if the drilling mode is not provided for in a specific model of a screwdriver, then it is better not to try to drill something with it. such experiments often end with a burnt out engine.

How to choose?

When choosing a particular model of impact screwdriver, pay attention to the smallest details. The first thing that people usually pay attention to is the type of food. Pneumatic models will definitely not be needed at home, but electric models are network and battery, as mentioned above.

The network option is good for working in an equipped room, it is most appreciated for its almost unlimited power. Having given preference to just such a device, evaluate its cable. it must have a significant length and thickness, have good insulation and not raise doubts about the strength of the place where it enters the unit.

In the case of the battery model, there are more selection criteria. First of all, you need to find a balance between a large battery capacity, which extends battery life, and the weight of the device, because a capacious battery always weighs quite a lot.

Another point is the choice of the type of battery: today, the most common lithium ion models, but nickel-cadmium are also found. The first ones are good with a small mass with a significant capacity, they allow charging at any time, but they are more expensive than the main competitor and can wear out quickly at low temperatures. The advantages of the nickel-cadmium solution completely neutralize the disadvantages of the lithium-ion version. such a battery is cheaper and not afraid of frost, but it is heavy and environmentally hazardous, and most importantly, it must be completely discharged and then fully charged, otherwise the “memory effect” will provoke rapid wear of the carrier.

At high voltage, the engine power also increases, but for home use, sky-high rates are not needed: 500-700 W is enough, otherwise the tool will be heavy and unreasonably expensive.

Screwdriver chucks, in which replaceable nozzles are attached, are quick-clamping and key. The first can be organized in different ways, but its advantage is that maintenance can be performed with bare hands. The key cartridge has a characteristic rim; a special key is needed to maintain it, which is not always convenient.

Since we are talking about the cartridge, an important criterion is the maximum diameter of its opening. the larger it is, the more different nozzles can be used.

Maximum torque is a measure of how hard the tip will rotate. This indicator does not always directly depend on the power of the motor, sometimes it can be increased due to the gearbox, but it is always desirable that the maximum torque is rather high. Models with continuously variable torque control are in priority, since they are more sparing for fasteners and surfaces that are drilled.

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Impact screwdrivers: what is and how they differ from shockless?

One of the peculiar criteria for assessing the masculinity of the owner of the house is considered to be his ability to drive a nail (or, in a modern way, screw a screw) into the wall. Without this elementary skill, it will not be possible to hang a shelf, decorate a room with a picture, or install a curtain rod.

An electric screwdriver is called upon to cope with this task faster and without unnecessary effort, and the impact driver is especially often praised, but not everyone understands what it is and why.

What is it and what is it for?

An impact screwdriver is a special power tool that allows you to most effectively drill walls in order to drive screws and install other fasteners. Unlike bumpless models, this relative novelty in the domestic market makes a hole not only due to the rotation itself, but also with the help of directed blows. The latter usually do not have a permanent character. the corresponding mode is turned on at the request of the operator, or automatically if the drill comes across an obstacle of particular hardness. In a way, it’s a little jackhammer.

Impact screwdriver. the device itself is more complex and “smart”, so a certain versatility should not be surprising. This means that the tool, as a rule, is fully compatible with various attachments, due to which the scope of its potential application significantly expands. instead of a drill, you can attach, for example, a hole saw or a mixing attachment.

It is logical that such a tool is somewhat more expensive than non-impact models, but its purchase is often justified even at home. the outer, load-bearing walls of multi-storey buildings are usually distinguished by the highest strength, which only an impact screwdriver can overcome.

The device is also appreciated by professionals who drill walls or various parts on a daily basis. according to them, for all its assertiveness, the drill of an impact screwdriver usually does not cause significant damage to fasteners, increasing their durability. This characteristic is especially valuable in the context that the same tool is often used to assemble furniture.

The classification of impact screwdrivers is not so extensive, but it can still drive many inexperienced consumers into a dead end. The logic of dividing tools into drills, screwdrivers and screwdrivers confuses most of all, but in fact everything is extremely simple here: the mechanism is generally the same for everyone, and the exact name depends on the nozzle.

So, a drill is usually equipped with a drill for making holes, and a screwdriver and a screwdriver at the same time know how to screw in fasteners. Some models imply a simple replacement of nozzles, therefore they can have complex compound names like “screwdriver-drill”, if such multifunctionality is not provided, the unit is called the most accurate term.

Often, when choosing, beginners are also confused by the fact that the device is supposedly electric and pneumatic. Electric models are the most common, especially at home, but pneumatic ones are perhaps very rare models that will definitely not be in demand at home, the main places of their use are various service stations and tire fitting enterprises.

Since the screwdriver is powered by electricity, it is impossible not to clarify that it can be both mains and battery. The first one is good for small home repairs or daily work in a well-equipped workshop, because it is lighter, and the master does not need to constantly remember to charge the battery.

However, it is the battery version that is the only solution during the construction process or for use on the street when the working site does not imply the presence of functioning outlets.

Care Tips

If you purchased a rechargeable model, remember that the battery should always be in the disconnected position, except for direct work. In this case, the nickel-cadmium battery must be completely discharged before turning off the device, and then immediately put on charge. Among other things, it is still not capable of storing a charge for a long time even when it is idle, therefore sometimes it needs to be recharged, even if you have not used it.

In the next one you will find an overview of impact and non-impact screwdrivers: AEG BS12CS vs BSB12C2.

Impact cordless screwdriver: what is it

A screwdriver is a handy electric tool that allows you to quickly unscrew and tighten bolts, nuts and screws. Modern screwdrivers are most often equipped with a battery, which makes it possible to use the device over the entire area without being tied to the length of the cord. These screwdrivers have the following advantages:

  • Small mass of the device, which makes it possible to easily hold it in one hand;
  • Low rotation speed, which allows you to unscrew the fasteners and not “lick” its notches;
  • The ability to adjust the torque. for more convenient screwing of fasteners of different sizes;
  • The presence of a reverse stroke. for unscrewing the fastening parts.

The main disadvantages of cordless screwdrivers are reduced to one thing. This is a low power. up to 20 V for unscrewing a bolt or self-tapping screw firmly seated in the base. To solve this problem, an impact driver was developed. This tool has a higher power. up to 36 V. There are both mains and cordless versions. The principle of operation of such a device lies in the fact that when, for example, a self-tapping screw in a tree is jammed, the electrical device automatically exerts a shock load on the fasteners, loosening it. over, this happens not along the axis of the screw, but along the axis of rotation. The device stops, abruptly gives the instant maximum rotation speed to the fastener and lowers it to normal speed. The cycle of such operations is repeated until the self-tapping screw is unscrewed. As a rule, the impact screwdriver quickly copes with this problem.

Why you need a cordless impact screwdriver?

Compared to other rotary devices, the cordless impact driver has the following advantages:

  • High maximum torque;
  • Reduces the load on the hand of the master;
  • Does not require increased downforce;
  • Has the ability to drill holes;
  • Automatic transition from normal to shock mode;
  • Long battery life.

The disadvantages include the following:

  • No manual torque control;
  • The need to use special bits;
  • Drills holes in fragile substrates such as wood.

An impact driver is a versatile tool for any DIYer, often referred to as an impact drill driver. However, when purchasing it, it is not so easy to make the right choice. Before you pay money and take the screwdriver home, you need to analyze the device according to the following criteria:

  • Maximum battery life without network connection;
  • Li-Ion battery type;
  • Tool power, which ranges from 24 to 36 V;
  • Torque not less than 70 Nm;
  • Comfortable feeling;
  • Weight no more than 1 kg;
  • Proven brand (Bosch, Makita, Metabo).

Impact screwdriver for what you need

Hand tools are needed to solve the problems of fastening or dismantling, drilling holes or destroying old fragile plaster. For example, hammers, screwdrivers, pliers and punches, but it is better to use electrical appliances. These devices will save you time and energy, and will help you to accurately perform all the work. There are screwdrivers, impact drills, and screwdrivers. Which one is better for home or professional use??

Cordless impact drill

Probably, many have an idea of ​​what an impact drill is. A conventional drill is a tool designed to drill holes in tough materials. It can be manual, pneumatic or electric. Among home craftsmen, the most common device is with an electric drive. Today, these drills have the additional battery and impact capacity that should help or speed up the drilling of a hole in a stubborn wall. With the help of special nozzles, this electrical device can unscrew or tighten fasteners, which include bolts, nuts, screws or self-tapping screws. However, this is not easy to do as the machine torque is too high, even if the speed is set to low.

An impact drill has the same properties as a conventional drill, but has the ability to move the rotary body along its axis. This means that when drilling materials such as high-strength concrete, this function must be applied, and then the drill not only rotates the drill, but also makes a large number of hits with it.

Thus, we can say that an impact drill-screwdriver is an irreplaceable thing in the range of electrical appliances of any owner, as it easily twists and unscrews fasteners of any complexity. The device makes holes in sufficiently strong walls, works for a long time and does not strain the hand, but sits comfortably in it, unlike an impact drill, which is difficult to mount and dismantle fasteners. It is heavy and requires the use of both hands.