How to sharpen a metal drill correctly. What should be considered

To drill metal, it is necessary to use extremely sharp devices. Drilling the drill depends on what revolutions are performed, which metal is processed by hardness, with what effort is pressed on the drill, whether cooling is present, etc. D. Depending on this, the frequency of sharpening of the tool is determined. For each specific case and the drill everything is individual.

Types of sharpening are completely different, they are determined by the degree of blunting of the drilling tool, its diameter, design and the specifics of purpose. There are standard recommendations that indicate how to properly sharpen the drill. They are not basic, but their observance minimizes the risk of damage to the tool and the formation of any defects on it:

  • When working, the edge of the device must be kept so that it is located in parallel to the sharpener;
  • Follow the gradual sharpening, without sharp movements by a drill;
  • Avoid excessive pressure of the drill to the surface of the grinding circle;
  • If there are no reflective glare on the treated surfaces, this indicates the completeness of the work.

It is also necessary to adhere to technologically recommended sharpening angles for a certain type of material.

It should be borne in mind that universal values ​​do not exist. For each type of metal processed, the installed angles of sharpening should be selected. An example of the technological quantities is indicated in the figure.

How to sharpen a metal drill correctly! About the proper sharpening of drills

In the household, the most popular power tool is the drill.

Using a reliable assistant, you can not only drill almost any holes, but also cut out places for installation of electrical devices, including sockets, switches.

But for this you will definitely need a set of drill. Drills are produced for working with any materials.During the work of the drill, they dull and need sharpening.

The material posted below tells how to properly sharpen the metal drill in addition to watch a video about sharpening options

What is a drill and how to sharpen it

For drilling work, special tools are produced, the most common of which is the drill.

Attention! To work with various materials, special drills with different angles of sharpening of the drill are produced.

In addition, the structure of the material affects the angles of sharpening.But first things first.

A drill is a cutting tool that performs the cutting process due to rotational movement during an axial supply.

Drills are used not only for the manufacture of through holes of various diameters, but also for drilling existing holes.Using the drill, you can drill a through hole, make a deepening of the desired diameter, perform the drilling to the required depth.

But to complete the listed work, you will need a drill of the desired diameter.

In addition, the drill should be properly sharpened.

sharpen, drill, corner, grinder

Various ways of sharpening for a specific material

And in order to find out how to sharpen the drill, you need to clarify for which material the tool will be used.

Structurally drill, spiral, flat or feather, ring, centr, for deep or unilateral cutting are produced.Spiral drills are produced by various diameters. Range 0.1 80 mm with the length of the working part up to 275 mm.

Flat drills are used to make a large diameter hole to a greater depth. Structurally cutting part is made in the form of a shoulder blade, attached to the holder.Ring drills are made in the form of a hollow pipe, which has a narrow ring cutting part.

The center drills are used to centers the parts when turning.

But all of the listed tools in the process of work are blunting. And since the drill is blunt, they need to be hidden. And to find out how to sharpen the drill, you need to imagine for which material the tool will be used and the OD of this to change the angle of the sharpening.

Less commonly, drill dudes during wood. If you use drill when drilling only on wood, then such drills do not require sharpening for several months or years. You only need to take care of their storage and use.

It is important for us to learn how to hide the drill when working on metal, concrete.

In order to find out how to properly sharpen the drill on metal, just watch the video about the methods and angles of sharpening.To carry out sharpening work, it is necessary to have not only sharpening equipment, but also protective equipment.From the means of protection it is necessary to purchase protective glasses.

And for sharpening the drill it is best to buy a sharpening machine.

A few words about the machine

Most often, a sharpening machine is made on the basis of a small electric motor 220 V.

Rotation frequency of a sharpening machine from 1500 rpm.

The machine must be equipped without fail, a transparent protective screen, a slipper.

At home, drilling with a diameter of more than 16 mm should not be used.

Since it is correct to sharpen the drill on metal if the drill is dull?

The fact that the drill is required to be sharpened by the emerging characteristic creak during drilling, especially at its beginning. At the same time, the drill begins to heat up hard, which even more leads to its erasure.

How To Sharpen A Drill Bit. Stainless steel drill bit sharpening

Drill drill on special sharpening machines. At home, the drill can be hidden on a simple sharpener with a stone, using a corner grinder with a nozzle, on an sandpaper.So, how to properly sharpen the drill on metal?How to hide the drill, determines the shape of the posterior plane of the drill.The fact is that the sharpening of the drill is carried out on the back faces.

Attention! A properly sharpened drill has two teeth, imprisoned exactly the same.Speaking about the types of sharpening, we note that there are several.

The easiest, monophysic.To perform a uniform sharpening, the drill is attached to the cutting part to the embankment in parallel. In the process of sharpening, it is forbidden to move or rotate the drill.

This is the easiest type of sharpening. But it is recommended to be used for drills with a diameter of up to 3 mm. The largest drawback of this type of sharpening is the destruction of the cutting edge of the drill during operation in the form of painting.The second common type of sharpening is called conical.This type of sharpening is used for drills with a diameter of more than 3 mm.

This is a more complex type of sharpening.It is difficult to manually perform conical sharpening of the drill.To fulfill it, you need to take the drill in the left hand, holding the working part. The shank is clamped with the right hand.The drill is pressed by the cutting edge to the end of the sharpening circle at the right angle.Shaking the drill with your right hand, create a conical surface on the back of the drill.

Attention! With smooth and slow movements of the hand, pull the fate of the drill without tearing it away from the surface of the stone.

Perform the same actions for the second part of the drill.Carefully monitor the withstanding of the shape of the back face and sharpening angle.For accurate measurement of sharpening angles, use a special device called an angle.If there is no measuring device, you can make a template.And what angles should be withstand, where to find out their value.

The angle of sharpening of the drill on the metal is selected from the table.

Important! During the work, do not overheat the drill, overheating leads to the conversion of steel. Be sure to cool and harden with water.

To provide the required drill sharpening angles, it is recommended to use special devices.The device allows you to sharpen the angles of the drill with the maintenance of table requirements.

Sharpen your drill bit with angle grinder | How to sharpen drill bit | Galaxy Fabrication | GF

How to sharpen a metal drill. Useful tips

There are drills of all kinds of species, but most often people with home work use drill designed to work with metal. Although such tools are made of special steel, over the years they still dull, after which they need to be sharpened.

Some people think: why bother if a blower drill is easier to throw away and purchase a new. But why spend extra money if a blower drill can be sharpened quickly and simply. There is one “but”. You need to make sharpening correctly.

We figure out how to sharpen the drill on metal “correctly”.

Firstly, you need to know that there are different types of sharpening. It may depend on what the drill is used for, as well as what type of metal is processed to them, as well as from the diameter of the tool. However, before the drill is sharpened, it is necessary to determine whether the sharpening is needed at all.

Definition whether sharpening is needed

Any person can intuitively determine that the instrument is a disorder. Sharpowing must be done if the drill begins to publish a strange rumble or creak. There are other signs of deterioration: for example, the tool begins to warm up intensely or the final result of the drilling is poorly quality.

We will analyze the nuances of how to properly sharpen the drill on metal.

Sharpening devices

Naturally, making a drill with your own hands is sharp again, and right at home is quite difficult. You will need various inventory.

Even in the most minimal set you will need the following:

  • Strength of the sandpaper;
  • A set of sharpeners (their hardness is chosen based on what the drill was made of);
  • A basin or any other vessel in which we will type refrigerant (water or machine oil);
  • Devices to ensure the required angle of sharpening.

What can be applied if the situation is critical and there is almost nothing to sharpen at home?

Let’s clarify that we must not forget about the safety rules. After all, in any case, there will be a lot of sparks, as well as sharp metal.

Corner grinder

If there is no sharpening sandpiper at hand, and at what angle to be sharpened. Not

  • It is so critically important, you can use a corner grinder.
  • There are two ways how to sharpen the drill at home with this tool:
  • The drill must be securely fixed in a vice (naturally, we carefully check the mounting angle). Then we put an abrasive disk on the metal on the corner grinder, then we turn it on and gently bring it to the sharpened drill.
  • In the second case, not a drill is attached, but directly the corner grinder itself. We put a disk with fine.Grained sandpaper on it. Run the corner grinder and gently lean against the disk on it a drill (naturally, a working cutting surface).

This method has its disadvantages. This is the danger of injuring, because during operation the drill constantly strives to jump off the circle.

Therefore, using a corner grinder is worth only if there is nothing else, and the size of the drill is not particularly large and does not have a significant value of the angle of sharpening.


It is possible to sharpen a drill and an ordinary file. You can do this even without much experience, you just need to choose a suitable suprafille to be sure how to properly hide the drill on metal. But there is one nuance here.

Drills (even “budget”) are made of instrumental fast.Cutting steel, so the file must definitely take with spraying from diamond crumbs (our instrument will not “take” the other file).

Well, you can’t do without a vice. They need to securely fix the drill in them.

An sandpaper

Naturally, it is best to hide the drill of the house on the emery machine. The main thing is how to hide the drill on metal is an important nuance: we bring the cutting edge to the circle so that it is parallel to it. A similar method is best for processing drills less than 10 millimeters. Of course, it is possible to sharpen on such a machine a drill of more than 16 millimeters, but for this you will have to buy special tools. Additional devices are suitable for sharpening universal drills and those that are used to make deaf or deep holes.

The order of sharpening the drill

No matter what type of drill, it must be sharpened in a strictly defined order. First, its back surface is subject to processing. It is necessary to ensure a tight pressing of the tool to the assault circle and carefully monitor that the angle of sharpening does not change. Then go to the cutting part. The last but the last thing is finishing the surface from the back.

It seems to be how to sharpen the drill, figured out. But of course, those who do this are for the first time are unlikely to work out properly at once, so you should first experiment on old, unnecessary drills, which were already going to throw away.

Angle when sharpening the drill

If you want to make a high.Quality sharpening, you need to follow the right angles:

The last point is true if the metal is drilled. In general, this angle must be selected from special tables.

The process of sharpening

Drilling must be done in a certain way. First, take the tool with the left hand near the front (working) part. With your right hand, tightly wrap the shank. Run the rotation of the disk on the corner grinder or machine and neatly (without strong pressure) we bring to it the back of the cutting edge of the drill.

IMPORTANT: When hidden, the drill is periodically necessary to cool.

Continuing to press the drill slightly to the disk, turn it with your right hand to sharpen the back. All this time we check the desired slope of the drill. We also look closely so that the cutting edges turn out the same in length and sharpened at the identical angle.

Checking the correctness of sharpening

When we sharpen the drill with your own hands, then many may have a question: how to check the angle of sharpening. Basically, special templates are used for this, on which there are cuts. Another option is specialized devices, such as the Slepinnin device.

How to sharpen a drill on metal with various tools: corner grinding, sharpener, drill

Modern drills have a sufficient reserve of strength to make even holes in a variety of materials. However, during operation, the cutting edge of this complex in structure of the tool can quickly swipe, which sharply lowers the effectiveness of its use. Therefore, a drill intended for metal work must be sharpened in a timely manner.

What signs indicate that it is time to sharpen the drill

Proceeding with the sharpening of the cutting edge of this tool without urgent need is not recommended. Indeed, during this difficult procedure, you can ruin the product with one incorrect movement, and only a professional can correct such a defect. Therefore, you should start sharpening the cutting part of any tool only after it really has become stupid.

Experienced masters understand that it is time to hide the cutting surface of the drill, according to the following signs:

  • During drilling, a small crumb flies instead of spiral chips;
  • The processed part and the drill overheat quickly;
  • The process is accompanied by a strong noise.

Each of these problems should be the reason for checking the sharpness of the tool with its subsequent sharpening.

Employees of specialized centers working on expensive equipment will cope with the problem in a couple of minutes. However, in the conditions of a home workshop, you can solve this problem in the presence of sufficient skills in the form of a “angular grinder”, sharpen or special forces for electric drill.

How to sharpen a “corner grinder”

Such a power tool has long ceased to be a curiosity and is present in the arsenal of almost every master, who from time to time deals with the processing of metal surfaces.

However, to restore the blunt drill, one “corner grinder” is clearly not enough. Additionally, a locksmith vice will be required in which the engine will be mounted, and a template made of plastic or interconnected nuts to check the angle of sharpening.

Tools are prepared. It’s time to move on to the process itself:

  • We clamp the drill between the “sponge” of the vice;
  • We turn on the “corner grinder”;
  • Carefully grind the worn part;
  • We pull the cutting surface at an angle of 115. 140 degrees (the larger the angle, the “softer” the processed metal).

Attention! Each contact of the cutting part of the tool with the surface of the circle should last no more than 2 seconds to avoid overheating of the working edge.

How to sharpen a sharpener

This “home” method has its own characteristics. The manual wrapping regime is available only to experienced locksmiths, which have great experience that allows “by eye” to restore any dull tools.

All other home masters will have to purchase or take a special holder from a neighbor. This device must be installed in the next to the emery (about 1 mm.). In this case, it is necessary to make sure that the stability of the bolt connection, in order to exclude the displacement of the latch during the work of the work.

Only after that can you proceed directly to the sharpening of the tool:

  • We fix the drill in the holder (the angle of sharpening is set in advance);
  • Turn on the sharpener;
  • We remove damage from the cutting surface;
  • Smooting the cutting surface by short.Term. No more than 2 seconds. Contacts with emery.

Attention! This option requires special caution, since the working part of the drill can overheat very quickly and become unusable due to a sharp decrease in the strength of the metal.

Each home master can go to the household power tool store to buy a nozzle there for a drill, with which you can use any drill without much difficulty if their diameter is laid from 4 to 10 mm.

It is necessary to act in this case in the following order:

  • We fix the nozzle;
  • We turn on the electric drill;
  • We insert the drill into the hole on the device and pull the cutting part on one side;
  • Then we take out the pulled tool from the hole, unfold it 180 degrees and sharpen the cutting part on the second side.

Attention! With a drill with a nozzle, you can only fuel the drill, but against serious damage or the “rolling” the cutting part, this device is powerless. Over, employees of specialized centers are unlikely to fix such defects, especially in the case of a serious overheating of the drill.

At home to restore the performance of a blunt drill on metal, the easiest way with a drill with a special nozzle. After all, this device, unlike the “corner grinding” and sharpened, will help beginners to avoid mistakes, because of which they will have to throw a damaged tool.

How to sharpen a metal drill

Correctly selected device will significantly reduce time costs and perform work as accurately as possible. Learn below how to sharpen a metal drill on a grind.

In addition to the main unit with an electric motor and a circle, you will need to purchase special devices holding a drill in a stationary state. Such racks allow you to control the angle of inclination and the supply of the tool during turning.

Many devices allow debugging cutting products for metal with a diameter of 3 to 19 mm. To steal spiral sovers, specialists can be used, which have a built.In electric motor and mechanism for serving.

Unlike the use of ordinary sharpener and holder, professional equipment can cost tens of thousands. Therefore, if the sharpening of the Sverle is not a profession, then you can do the use of the above tandem from the tochline circle and the holder or make the instrument editing manually.

You can make a drill with a file without experience. The main thing is to choose the right file. Given the fact that even cheap cords are made of high.Quality cutting steel, you will need to choose a file with diamond spraying. In addition to a file, you need to prepare a vice in which you should fix the tool.

In order not to waste strength and time on the manual method, you can apply an angular grinding grinder with an abrasive circle.

sharpen, drill, corner, grinder

Sharpening of the drill corner grind

The grinding machine is available in almost every home workshop, so the method will be one of the most budgetary.

In addition to a corner grinder with an installed grinding circle for work, you need to prepare a vice in which the drill will be held during sharpening. In the room where the tool is debugged should be light so that the process of removing the metal from the cutting surface can be controlled.

Debugging is carried out in the following sequence:

  • The drill is installed in a vice in an upright position;
  • The corner grinder removes part of the rear edge to completely eliminate traces of wear;
  • The cutting edge is pulled at an angle of 120 degrees.

So that the drill does not overheat during the turning, the contact of the emery circle with metal should last no more than 2 seconds. Repeating repeatedly the removal of a small amount of metal from the working edge, it is possible to adjust the tool on the required angle.

For measurements, it is recommended to make a template from plastic, which will help control the size of the angle of sharpening.

It is more convenient and safer to carry out work using a sharpened circle and a special holding device.

Sharpening the drill with a sharpener

Determine the amount of damage to the cutting product and debugging by eye is possible after many years of practice.

In other cases, you can install a special holder of the Sovers in the immediate vicinity of the sandpaper. The fastening should be durable so that during the performance of the work there is no displacement of the latch. If the grinding machine is fixed on a wooden basis, the installation of the latch should still be carried out using a bolt connection.

To perform sharpening: the tool is reliably fixed in the holding device, the sharpener engine is turned on and the drill is in contact for a short time with a sharpened circle from a pre.Selected angle.

  • If Zazubrins formed on the surface of the cutting product, then before debugging it must be removed evenly on both sides.
  • Caution should be shown. Large diameter products are heated from contact with an abrasive circle to high temperature, which leads to a decrease in the mechanical strength of the metal.

Sharpowing with a nozzle for a drill

Without an emery machine, using a special nozzle for a drill, you can perform an operation with a high.Quality and with lower time costs.

You can purchase a nozzle in any specialized store, but you can use the device only for sharpening medium in diameter of products. Most of these nozzles allow you to effectively finish the tool with a diameter of 4 to 10 mm.

For beginners, the method is the most preferred. Sharped Super is as follows.

  • Set the nozzle on the drill;
  • The drill is inserted into the hole of the appropriate diameter;
  • The drill is turned on and the product is pulled on one side;
  • Turning the drill 180 degrees the opposite edge is pulled.

To use the device effectively, consider the following features:

  • Using the nozzle, only slightly dull tools are hidden on the drill. If there are deep damage to the cutting surface and when the drill was overheated, it does not work to restore the product.
  • Angle of sharpening in such devices fixed. Therefore, to restore the Sovers for working with non.Ferrous metals, it will be necessary to purchase an original device, or to finalize the products with a file.

Despite some disadvantages of this design, its use allows us to simplify and speed up the process of restoring the cutting edges, and low cost explains popularity.

The main rules

Before starting work, you should familiarize yourself with the structure of the drill. The tool consists of a shank and the working part, at the end of which there are elements involved in cutting metal or other material:

The sharpened drill looks as follows:

  • Two cutting edges are sharp and symmetrical to each other.
  • The rear surfaces are braked and located below the cutting edge. That is, between the detail that needs to be drilled, and the pinnacle of the tool is present.
  • The jumper is not too thick and is in the center.

To sharpen the drill, it is important to organize good lighting in the room. A person must have good vision. If the vision is low or the tool is small, you need a magnifying glass (glasses with an increase).

The process of sharpening

It is advisable to properly sharpen the drill on metal using special devices and machine tools. Unfortunately, in the conditions of a home workshop, such equipment is not always available, and usually sharpening for metal with his own hands is performed on an electric sharpener with abrasive materials, for example, on stone circles. Sharpening is carried out along the back faces, while all teeth should be sharpened absolutely identical. At the same time, it is hard to withstand the given angle and the desired shape, and it is easiest to tighten at home only spiral and coronal tools.

The angles of the working surface

In order to know how to sharpen a drill on a metal on a grind, you should remember a number of important parameters used to the cutting part, the execution of which guarantees a qualitative result:

  • The location of the rear of the tool in relation to the drilling plane = 10 °,
  • The angle of sharpening of the front surface = 20 °
  • Angle at the top of the cutting tool = 118 °

In this case, the angle at the top may vary, depending on the material with which you have to work:

There are several types of sharpening used for various purposes. The most common are considered:

  • Single.Plated. In this type of processing, the rear surface of the pen is made in the form of one plane. The rear angle lies within 28-30 °. The drill is put by the cutting part in parallel to the sharpening circle and does not change its position. It is considered the simplest type of sharpening of drills with a diameter of up to 3 mm, but the disadvantage is that during the drilling process the cutting edges can crumble.
  • Conical sharpening. As a rule, it is used for drills relatively large diameter. It is hard to carry out without special equipment and without appropriate skills. The drill should be taken with the left hand for the working part closer to the cone, and hold the tail with your right hand. Then the tool is pressed to the end of the sharpened stone with the surface of the rear and the cutting edge. During the sharpening process, the drill sways slightly by the tail with the right hand, this allows you to create a cone.Shaped surface on the feathers.

sharpen, drill, corner, grinder

Material refinement after sharpening

Figure is carried out on special argument circles. Their difference from conventional grinding circles is that aggressive processing of the material is united with obtaining a good finish surface.

Due to the softness of the material and high.Quality abrasive, such circles are ideal for eliminating scratches and other surfaces, their elimination is carried out without changing the geometry of the working part of the material. As a rule, such circles are installed on an angular grinder or drill, which allows you to more conveniently and accurately process a clamped drill, for example, in a vice.

In addition to the arguments, you can refuel the working surface with the help of an emery located on the disk of the same corner grinder.

Superflow of the surface

Properly performed sharpening of the drill on metal with your own hands on a tool with a diameter of up to 10 mm is enough for work, for wider it is recommended to additionally undermine the front surface.

The meaning of this processing is that by increasing the angle of the cutting edge and reducing the front angle, resistance to cringing increases, this leads to an increase in the drill resource. In addition, the width of the transverse edge decreases, so that the material in the central part of the hole is not drilled, but will scatter, which facilitates the process of drilling metal. For a drill with a small rear angle, you can draw a back of the rear surface to reduce its friction inside the hole.

Types of sharpening

Designing a machine for sharpening drills with your own hands, it is worth considering the types of profiles. They are set by the manufacturer and can only be restored after “licking”. Main forms 5:

  • Normal appearance marked by the letter “H”. The most common type found on most edges up to 12 millimeters (for large diameters is not suitable). In this case, only 2 cutting parts and 1 transverse.
  • “NP” or normal with a subfunked jumper. In this case, the transverse is shorter. Suitable for edges up to 80 millimeters, since there is almost no load on the back.
  • With a fingering and ribbon or “NPL”. Necessary for drilling large holes in high.Strength steel. Reduced transverse and tapes reduce friction.
  • “DP” or double.Shaped edges. In addition to standard 2 edges, there are more additional 4, representing a broken fishing line for a trimmer. Actively “bite” into the metal, removing more metal in 1 scroll.
  • A similar edge, but having a groove of the tape is called “DPL”. Friction force additionally reduces friction.

Features of sharpening steps

Street drills for metal are produced in several structural performances, each model is designed to arrange holes with a diameter of 4–32 mm. This is an expensive, but very high.Quality tool that can last up to 2 years even with intensive use.

According to the recommendations of the manufacturer, sharpening steps on metal is possible, but only some models. The rest of the restoration and subsequent re.Use are not subject to.

Unlike ordinary conical drills, it is not easy to sharpen: if the operation is incorrectly performed, the cutting edge of the tool may become unusable.

To return to the life of a step cutter, sandpaper is used, which turns a special rotating disk. At the same time, processing can be carried out both using a machine for end mills and hands. The first option is used for products with spiral grooves, the second. For a tool with straight cavities.

And you once came across the need to sharpen the drill on metal at home? Do you have everything or some difficulties have arisen? Please share your own experience in the Комментарии и мнения владельцев.

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