How to drill metal with an electric screwdriver

The correct way to use an electric screwdriver

The electric screwdriver has successfully replaced not only different kinds of screwdrivers, but also wrenches, Allen keys. This tool is also used in place of a drill. For construction workers and furniture makers, the electric screwdriver has become indispensable. For it and in the home constantly finds application. There is a wide variety of models on the market. Despite the prevalence of screwdrivers in various industries, not all users, especially beginners, know how to operate it. Proper use, maintenance and storage of power tools will prolong to the maximum its service life.

According to the method of power supply, screwdrivers are divided into two varieties:

drill, metal, electric, screwdriver

Recently there have also been appearing tools with a combined power supply. They combine all the advantages of both varieties.

The external and internal construction of cordless and corded models is almost identical. In general, a power tool consists of the following structural elements

  • housing;
  • chuck;
  • push button;
  • The switch for the motor rotation direction (reverse);
  • regulator of speed (number of revolutions);
  • the power button;
  • tightening torque regulator (torque switch).

The following photo shows the design of a cordless type electric screwdriver.

A number of models are additionally equipped with a backlight, which is structurally realized in different ways. Not every product has a speed regulator and power lock button. Cordless electric screwdrivers have a power cord, but cordless tools have a battery charger instead.

The body of a power tool is most often made of plastic, much more rarely. of alloys of different metals. For convenience, it usually consists of 2 halves. Inside the housing are such major parts:

Electrical connections vary depending on the model.

The electric screwdriver can be equipped with different types of chucks. The most common is the three-jaw quick-action variant of this component. The chuck also consists of separate parts, as can be seen in the photo below.

It must be taken into consideration that there may be some structural changes if the application of the electric screwdriver is highly specialized.

The principle of operation is the same for both mains and cordless screwdrivers. It consists of turning the motor with electric power. The gearbox and shaft transmit the power and speed from the motor to the bit fixed in the chuck. It already drills a hole or screws or unscrews fasteners. The peculiarity of the process is that the electric motor in the network models runs on an AC voltage of 220 V, and the battery. on a constant, the value of which can range from 3.5 V to 36 V.

Types of screwdriver bits: how to choose a bit

In order to choose the right bits you need to know what they are. First determine the type of shank shape and diameter. It comes in 1/4″ to 1″.

    spline. They differ in the width and thickness of the spline;

Drywall bit has a stopper

Combination bits have two types of shank or one type, but different sizes. For example, slotted shank and sprocket.

Determine the bit length you need for your application. it ranges from 10 mm to 200 mm.

Depending on the shape of the shank, tools have certain markings:

  • Slot. Slotted;
  • Ph (Philips). cross-shaped universal;
  • Pz (Pozidrive). cross-shaped with additional thin ribs;
  • T (Torx hole). sprockets;
  • H (Hex). hexagonal.

Important specifications are the steel grade from which the bit is made. The nozzle may have a protective coating. The durability of the tooling depends on it. The main types of steel and coatings to give preference to:

  • Cr-v. chrome vanadium steel. The most common, with increased hardness;
  • Cr-Mb. chrome-molybdenum steel. Less common. Very durable material;
  • Ni. nickel coating. Increases corrosion resistance;
  • WC. tungsten carbide coating. Increases the strength;
  • Tin. titanium nitrite yellow coating. Increases strength.
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Tin. coating for increased toughness

The nozzles are differentiated according to their purpose:

Considering all the considered parameters, it is easy to choose the right bits.

How to Properly Use a Screwdriver

For successful application, it is important to follow the instructions carefully. How to use an electric screwdriver?

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Preparation for work

Beginning craftsmen often don’t even know how to properly turn on an electric screwdriver. To use the device at home, you need to do the following:

  • Remove from the case and make sure there is no damage.
  • Attach the battery after inspection and check that it is sufficiently charged.
  • Insert the bit you need. This is done taking into account the nature of the work. screwdriving or drilling.
  • Use the knobs to set the operating mode and rotation speed.
  • If necessary, set the drilling depth.

In the preparatory phase, the right accessories need to be installed

Executing a bit change

Many people wonder how to properly screw a bit into an electric screwdriver. To do this, you need to understand the features of the design.

To fix the bit in the chuck it is worth using a special nozzle that has a magnetized holder. It prevents the chuck from falling apart and gives the bit a good hold in various positions. To fasten the bit, unscrew the sliding part of the chuck, place the bit in it and fully tighten the chuck.

Torque setting

To set the torque, the tool is equipped with an adjustment ring with the values plotted. They are set according to the hardness of the materials. Thus, for screwing in self-tapping screws in drywall, 2-4 is enough, and for durable wood, the maximum mark is more suitable.

The direction of rotation of the chuck

The direction of rotation of the chuck can be reversed to tighten or loosen fasteners. This should only be done after the engine has come to a complete halt. Setting the switch in the middle position prevents the electric screwdriver from working.

Direction of chuck rotation

All models have a mechanism by which to change the direction of rotation of the chuck. This function is called “reverse. It enables previously screwed-in fasteners to be unscrewed.

To understand how to turn an electric screwdriver into reverse mode, you need to know the peculiarities of its design. The two-position switch visible on each side of the housing is located next to the start button. There are arrows on it. forwards and backwards. The middle position of the switch causes the tool to lock (used when changing accessories).

Screws and screws are driven clockwise and can be unscrewed by reversing the chuck rotation. If the machine is on, but not working, you need to check the correct setting of the “reverse” switch.

Reverse power is switched only after the motor of the electric screwdriver has stopped completely.

Features of drilling in concrete

As already mentioned, the electric screwdriver can be used in different spheres and in different ways. With electric screwdrivers, you can drill in wood, concrete, and many other materials. Carefully read the instructions for use for a particular model, because it is specified there for drilling what materials it can be used.

Very powerful screwdriver drills are used for drilling in concrete. Most often such tools work in percussion mode, but even with such a device to drill a concrete wall is quite problematic. Therefore, for such cases, it is better to use a special drill bit with diamond coating.

How to drill metal with a drill

Hello, everyone! About how to drill metal with a drill, if you want, you can write a very long article. But I see two main problems here:

Usually such problems are encountered by inexperienced users. Seasoned men know what to do in such cases. Well, referring myself to the experienced, I take the liberty to tell you how to cope with these problems. And I’ll give you a few more tips, which will also be useful.

How to drill in the right place?

If you think a little bit about the question, the answer should visit your head, even without prompting. So it seems to me at least. But if you don’t want to think about it, read on.

For this case will need a core. A drill is a solid steel tool that has a cylindrical shape and a point on the end.

We put the tip to the desired place of drilling and hit the slope from the other side with a hammer several times.

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Now that you have drilled, put the drill bit against the surface irregularity and start drilling. the tip will not run anywhere.

How not to dull the drill bit?

Metal drill bits become dull if they become too hot during operation, which causes them to lose their strength. The heat is due to friction. And the faster it spins, the hotter it gets.

Hence the obvious rule. drill at low rotational speed of the drill. They should not be more than 1000 per minute. But who can measure this while working?? So simply do not turn the start button too fast. The correct speed can be estimated as follows: the eye should be able to see the rotation of the drill. That is, the grooves on it should not merge into one for vision.

Additional cooling is required for thick workpieces. It is provided by special greases or pastes that are added to the place of drilling, or the drill bit is dipped into them. In addition, they not only cool but also lubricate the tip, so there is less friction.

Special greases and pastes are not necessary in the home environment. You can get by with regular machine oil.

So, use a drill bit, drill at a low rpm and add some grease or oil and it will seem like a walk in the park.

And some more tips on the subject.

Types of drills

Use only metal drill bits for drilling (not wood, for example). They have their own sharpening and are made of certain types of steel. The most common are marked P6M5, which is a high-speed steel, which foreign manufacturers label as HSS.

For added strength, the drills above are coated with titanium nitride. Which causes them to turn yellow.

Using Power or Electric Drill as Electric Screwdriver

There are also stronger P18, which is used appropriately for hard steels.

Also, to increase the strength, Cobalt may be added, and then the marking Р6М5К5 turns out.

And the toughest are drills with tungsten carbide tip. They are used for drilling alloy steels. It will also take ordinary steel, but buying it just for that will be a little rationale, as the price is quite high, and it is hard, but still blunt. But to sharpen it afterwards will be difficult, because it requires a diamond disk, which is also not cheap, and you can not buy everywhere.

Drilling of thick workpieces

If the workpiece is more than 5 mm thick, and you need a hole more than 8 mm, it is better to make a hole with a thin drill bit first, and then work with a thick.

Working with some kinds of metal

  • When drilling thick aluminum workpieces, chips often clog the drill bit passages, making it harder to rotate. So when working with this material take the drill out of the cavity more often and remove the shavings. And don’t forget to give plenty of oil.
  • If you want to drill a hole in black iron, then you do not need to add any lubricants-coolants, because it is very well drilled dry
  • Unlike black iron, white iron has an increased strength, and therefore it requires a strong drill bit and grease

These are the basic rules for drilling metal with a drill. I hope I have been able to bridge this gap in your knowledge. Good luck with your chores and see you later!

How to drill a hole in metal

Metal products are more hard and strong compared to parts made of other materials, so to work with them you need to follow the technological process and use high-quality cutting tools.

Tools for drilling work on metal:

Metal drill bits are selected based on hole diameters and material properties. As a rule, they are made of high-speed steels, such as R6M5K5, R6M5, R4M2. Carbide drills are used for work with cast iron, carbon and alloy hardened steels, stainless steel, as well as other hard-to-machine materials.

Power of an electric drill must be designed in order to drill a hole of required diameter. Power tool manufacturers indicate the appropriate technical specifications on the product. For example, for drill powers of 500700 W the maximum diameter of metal drill is 1013 mm.

A distinction is made between blind, incomplete and through holes. They can be used for bolt, stud, pin, and rivet connections. If the hole is drilled with the purpose of thread cutting, it is worth paying special attention to the choice of drill bit diameter. Because of its runout in the chuck there is a breakdown of the hole, which must be taken into account. Approximate data are shown in the table below.

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Drill diameter

Hole spacing


5 10 15 20
0,08 0,12 0,20 0,28
5,08 10,12 15,20 20,28

To minimize the shrinkage, you drill in two steps: first with a smaller-diameter drill, and then with the main drill. The same method of successive reaming is used when it is necessary to make a hole with a large diameter.

Can concrete be drilled with an electric screwdriver?

In order to answer this question, it is necessary to know in which material the holes must be drilled, their depth and diameter. Holes with a diameter of 10 mm or more are problematic to execute using an electric screwdriver. But if the drill bit is thin (3-5 mm), you can drill with an electric screwdriver with such elements. Drill bit rotation speed affects the ability to drill in hard materials. For screwing in the screwdriver a speed of 500 rpm is suitable./minute, and you can drill concrete with a tool with a torque of 1300-1500 rpm./min. Equally important is the torque, namely how much force is applied to tighten the screws or the drilling process. For concrete, choose an electric screwdriver with a power of 140 N/m, using it in the working limit position of the clutch at maximum power.

The design of an electric screwdriver consists of the following elements:

The device consists of various parts, the coordinated work of which ensures the necessary functions.

  • Pistol-shaped handle (for working with the leading hand);
  • An electric motor;
  • socket;
  • chuck for fixing the bits;
  • the limiter. a button that starts and regulates the rotation;
  • Gear (reduction gear), which transmits the rotation from the motor to the shaft;
  • Battery to supply power and constant voltage to the motor.
  • Cordless. Self-contained by internal battery.
  • Mains. Electrical power must be available when using. This power tool is much more powerful and cheaper than the cordless type.

Cordless type of device must be charged in a timely manner, so it does not fail at the most crucial moment.

The battery type loses performance when discharged, so you should charge the tool each time before working according to the instructions. Cordless screwdrivers do not have this problem, because they are connected with a cable to the mains. For drilling in concrete, the unit is equipped with an impact drilling function with a switch to the side of the head rotation. reverse and reverse. The second mode is used for demolition. To drill holes in concrete, the models are equipped with a torque adjustment function. This is to prevent the slot and replacement bits from becoming unusable.

Methods of spot-welding drilling

This procedure is particularly in demand at vehicle service stations where auto body repair is performed.

The spot welding drill bits are the most efficient and accurate way to separate components. The work is performed at low speed. Otherwise, the drill quickly overheats, which reduces the sharpness of the cutting edges.

Tool diameter is less than 9 mm. Drill bits are distinguished from conventional designs by special lugs that are taper-sharpened. It makes it possible to maintain a 90º angle when drilling. Thus, there is no need to perform alignment.

Some craftsmen prefer to use cutting crowns. They explain their choice by the fact that the tip of the drill bit cuts through the hardened part of the spot welding.

It is noteworthy that regardless of the type of cutting tool, it is made from the same type of steel. high-speed P 18. Alloy 45Х is used for budget models.

Drilling holes in metal is a rather complex procedure which tolerates no breaches of the technological requirements. The mode of operation depends on the diameter and type of the hole. Do you think it is possible to do a quality job with a hand tool without any accessories?? Write your opinion in the Комментарии и мнения владельцев block.

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