What drills are needed for making furniture with your own hands?

Drilling holes for confirmation

Modern furniture made of chipboard and MDF is often assembled using confirmatory screws, which among furniture makers are also called Euroscrews or Euroscrews. Before screwing them in, technological holes with strictly specified parameters are drilled in the plates. The process of preparing these holes will be discussed in this article.

Dimensions of holes for confirmation

There are no GOST standards for confirmed screws; they are manufactured according to European standards 3E120 and 3E122 and have a fairly wide size range, represented by the following standard sizes: 5x40, 5x50, 6.2x50, 6.4x50, 7x40, 7x48, 7x50, 7x60, 7x70 mm.

The most common size is 6.4x50 mm

. To drill a hole for its thread, a drill with a diameter of 4.5 mm is used, and for the smooth part - 7.0 mm.

How to connect?

To connect two parts made of laminated chipboard (the thickness of one sheet is 16 mm), a euroscrew is used. One of the most affordable and accessible methods today. To install it you will need:

drill;
drills 4.5 mm and 7 mm or “confirmed” drill;
handle, square, hex key.

The advantages of a confirmat over an ordinary self-tapping screw are great, because it not only pulls the parts together, but also firmly holds them from lateral displacement.

Read also: Porcelain crucibles for muffle furnaces

Otherwise, the confirmation will fall out, or, on the contrary, it will tear the chipboard, and you will ruin the furniture.

It is necessary to tighten two parts with a thickness of 16 mm. We retreat 8 mm along the vertical part of the part and draw a center line and put a dot. We make a hole using a drill with a diameter of 7 mm. On the second part we do the same, only we take a drill with a diameter of 4.5 mm. If you have a “confirmed” drill, the work is reduced significantly, but such a drill is quite difficult to find. All you need to do is make a hole and connect the two pieces together. The use of such a drill is rational in case of a large volume of work and repeated use. It is not advisable to buy such a drill for “one-time” use.

Confirmat will hold securely and firmly even if there are pores in the chipboard.

The main thing here is to maintain all sizes.

When assembling furniture, confirmat 6.4*50 is used. To connect the parts efficiently, the hole diameter should be 4.5-5 mm. and 50mm deep.

Using Euroscrews, you get high reliability of the sections tightened with this fastener.

To connect the parts efficiently, the hole diameter should be 4.5-5 mm. and 50mm deep.

How to choose the right one

To make a choice, you need to measure the Euroscrew head (its inner part). Performance may vary from manufacturer to manufacturer.

The end of the Euroscrew is blunt, which is a distinctive feature of this element.

If the resulting value is 6.3 - 7 mm, a 7 mm drill will do. It is universal for mount models 7x40 - 7x70 mm.

Euroscrews come in different shapes.

Even if a slight backlash is formed during drilling, it’s okay. As a last resort, you can loosen the connection, adjust the location of the parts and re-tighten the confirmation.

The method of twisting the confirmat depends on the shape of the head.

The same applies to models 5-40 and 5x50. 5-6 mm drills are suitable for them.

Design features of drills for confirmations

Euroscrews are used both on hardwood products and on furniture made from chipboard and LMDF. In these cases, the load on the tool is high. When choosing low-quality products, noticeable wear of the cutting edge occurs. When purchasing, you need to make sure that the confirmat drill has a Rockwell hardness of 61-64. A self-respecting manufacturer indicates this value on the packaging.

If the drill falls into the hands of a master without information about the product, then you need to look at the body of the product. Domestic manufacturers write the steel grade. Drills made from alloys R9M5 and R18 are considered the best. Among imported products, products made from HSS 4341 have excellent performance. The abbreviation stands for High-Speed Steels, that is, just like P9M5 and P18, it is high-speed steel.

Drilling in two parts at the same time

This option is considered the most accurate and, moreover, the fastest. But in order to make a hole in two parts at the same time, you will need to fix them before drilling. To do this, you may need special clamps, clamps and other devices.

Hole Drilling Tools

In order not to mark 8 mm from the edge each time both into the layer and at the end, you can use a special device, which, by the way, is easy to make yourself.

It is a kind of wooden template with a metal sleeve for a drill inside.

It looks like this, see photo:

And this is a more professional thing:

Watch a short video on how to accurately drill holes in chipboard for confirmations and assemble furniture parts:

Recommendations and tips for use

Before using the drill, mark the location where you want to use it.
To obtain a reliable connection of parts, you need to follow a number of rules:

select a drill that meets European certificates;
apply precise markings on the component parts (take allowances into account);
fix the details;
control the tool while drilling.

Use quality tools for the job.
For greater convenience, you can get a special tool. You can purchase a ready-made one or make it yourself: cut out a wooden template with a metal sleeve for the drill inside.

Buy quality drill bits.

Universal devices for adding parts will help you complete the job faster and achieve maximum assembly quality. With their help, preliminary holes of smaller diameter are made.

You can find instructions for using the drill on the Internet.

Drilling rules

Reliable and accurate fastening of furniture parts depends on following the step-by-step instructions. The drilling procedure and rules are as follows:

Check whether the confirmat drill matches the available Euroscrews.

Make precise markings on the parts, taking into account allowances.

Fix one or both workpieces in the desired position.

Drill a hole, controlling the position of the tool.

A drilling device will be a good helper in your work. Similar universal products are available for sale, but you can make them yourself. Designs vary, from simple templates to devices with guide bushings for precise drill orientation.

It is very convenient to use universal devices for adding furniture parts. They are used to make preliminary holes of smaller diameter.

They have a certain thickness and a standard confirmat drill, the dimensions of which are not designed for this operation, will not work. They are given finishing treatment. All the same, the end result is a gain in time, and most importantly in the accuracy of the holes.

Using three drills of different diameters

This method is suitable for small volumes of work, as it requires more time. Hole preparation is performed in three approaches:

First step

– drilling through two parts for the entire length of the Euroscrew. The diameter of the drill must be equal to the diameter of the screw body without taking into account the thread. This is done so that the threads can cut a counter thread in the material.

Second step

– expansion of the already obtained hole for the smooth part of the hardware, which should have a tight fit, but not too tight, so as not to split the material. Reaming is performed with a drill equal to the thickness of the neck and to a depth equal to its length.

Third step

– countersinking a hole to deepen the head into the material. This can be done with a drill of a larger diameter, but to obtain a high-quality result without chipping, it is better to perform this operation with a countersink.

Drilling into the layer of a part

We make a hole at a distance of 8 mm from the edge.

The drill should ALWAYS be held strictly perpendicular to the surface.

Before making a through hole, place a piece of unnecessary chipboard under the part. This will prevent chips from appearing on the reverse side.

When the through hole is made, the part can be drilled on the fly to drill holes for the neck and head of the confirmat.

Manufacturers of confirmed drills

The Euroscrew drill is a more complex tool than conventional cylindrical twist drills. Therefore, its choice should be approached responsibly. There are many manufacturers on the cutting tool market today.

Among this diversity, the following characteristic groups can be distinguished:

domestically produced tools;
cheap Chinese instrument;
high-quality Chinese instrument;
especially high-quality instruments from recognized European manufacturers;
especially high-quality tools from North American companies.

It should be said right away that a cheap Chinese instrument can be identified by its appearance. There are often not even markings on it, and the surface of the instrument may have unevenness and chips.

And while the cutter can withstand a large number of work cycles, the drill itself quickly fails and needs to be replaced. In cheap Chinese tools, the fastening screws very often do not fix the drill in the cutter, and it turns during operation. This leads to the formation of poor-quality holes in the wood. The connection of parts during such processing will not be reliable enough.

But there are also good drills made in China. You can find a good Chinese drill for furniture ties only by trial and error, or by getting advice from a happy owner of such a tool.

A drill for domestically produced furniture screed is slightly higher quality than the cheap one made in China, since good grades of steel are used in production.

If you use a tool in professional activities, you may want to pay attention to American, Western European and Scandinavian brands. These companies produce reliable tools and provide them with a warranty of up to a year. Brands such as Brigadier, DeWault, Hafele, Archimedes are definitely trustworthy and time-tested.

The best manufacturers

The unsurpassed leader in production remains Hafele, the brand that was the first to supply these fasteners to the market. The company's products are made of high-quality steel and are excellent for installing hardware.

Products from the German company Hammer Werkzeug GmbH are also trusted. Among Russian manufacturers, one can note the Praktika company.

How to choose a drill?

Before you start assembling furniture, you need to prepare all the tools. Information about the Euroscrew itself will help you choose which drill to use for the confirmation. If you have a ready-made device of the right brand, then there will be no problems.

However, often in the practice of home craftsmen there is a situation when they have to work with what is available. It is strongly not recommended to use drills of a smaller diameter - for confirmations 5x40, 5x50 this size is 3.4 mm, and for products 7x40, 7x50, 7x60, 7x70 - 4.5 mm.

The fastening element does not screw into a hole that is not large enough in size and becomes jammed. If you work with furniture parts made of chipboard or LMDF, then at best they will swell, and at worst they will crack.

The head of the confirmat is measured, the part that is inside the product but does not have a thread. It may vary slightly between different manufacturers. The diameter ranges from 6.3mm to 7mm. Which confirm drill should I choose in these cases? The factory device is designed for a diameter of 7 mm.

It is universal because the size of the head does not play any role in ensuring the reliability of the connection. This part of the Euroscrew is located in the upper, pressing part. The load falls on the confirmation cap, which centers the fastener and tightens the structural elements.

A little play is sometimes even convenient. If there are minor errors, you can loosen the connection, adjust the position of the part, and tighten the screw again. Even a hole a millimeter larger than 8 mm will not impair the reliability of the fastener.

What holes should I drill for the Euroscrew? — Metals, equipment, instructions

A single-element screed is a fastener loved by professional furniture makers and ordinary DIYers.

Widely known since the 90s under different names: “Euroscrew”, “Confirmat” and others. The German company Hafele was one of the first to produce products. The brand name was Confirmat.

To insert fasteners, a special drill for confirmat .

A hole is required for the euroscrew. The difficulty lies in the fact that its design is heterogeneous: the outer diameter of the thread and the size of the head are different. There is also a hat. All this must be taken into account for reliable fastening. You can do the following:

Drill a hole corresponding to the length of the confirmat. Its diameter is made slightly smaller than that of the external thread.
The head of the European screw is slightly wider. It should fit tightly into the hole, but not too tightly, otherwise cracks may appear. The upper part of the hole already made will have to be expanded with a drill of the required diameter.
In order for the hat to fit well, you need to make room for it . To obtain the desired socket, additional processing is carried out using a countersink. Although some masters omit this step: it is enough to twist the confirmation a little more tightly.

That is, in order to insert one euroscrew, you need to have two suitable drills and, preferably, a countersink. You will need to perform several operations, each of which may end in failure, especially for a beginner:

the position of the hole and its angle may be taken incorrectly, which will affect the reliability of the connection;
When countersinking, chips are possible.

A special confirmation drill can significantly simplify the process and save time and nerves. Usually it replaces all the tools described above and allows you to make a hole quickly, in one motion. Good examples do not damage the edges of the hole or do so only slightly. A small defect can usually be closed with a cap or plug. Products fit:

for hard and soft wood;
for chipboards with and without coating;
for plastic.

Dimensions

The confirmation holes correspond to the following drill sizes:

HSS 7x70;
HSS 7x50;
HSS 6.3×50;
HSS 5x50.

HSS from English High - Speed Steels, that is, products are made of high-speed tool steel. The foreign brand HSS 4341 or Russian ones are best suited for their manufacture:

The hole should be stepped, since the confirmat has parts of different diameters. Therefore, special drills for it should follow the shape of the fastener. This can be achieved with the help of an appropriate design.

The fastening part is connected to the drill chuck. It has a hole (blind) for a removable drill. The latter has a sliding fit and is made with a slight gap. This prevents bending and breakage. The cutting part is stepped, allowing you to make a hole with several diameters at a time. The design may not be dismountable.

The Euroscrew drill has the following structural features:

The front part is made at an acute angle. This is necessary for better fit and ensures centering of the hole.
The angle of the helical groove is the same as that of the thread in the confirmation. The fastener fits well and holds more securely.
The position of the thrust part can be adjusted. This helps to avoid over-drilling: there is no need to additionally monitor the depth of the hole.
Polishing the surface of feathers is given special importance. This reduces friction and improves chip removal. The latter is removed through the holes in the end of the stop.
The contact area of the stop is made as small as possible so as not to crush the side surfaces of the hole. The drill life remains within acceptable limits.
The stop not only centers, but also performs countersinking, which is necessary for better fit of the head. That is, the hole is turnkey, you can immediately insert the confirmation.

Main characteristics

A high-quality drill bit for a furniture euroscrew should have the following characteristics:

impact strength (kc): 150−165;
temperature resistance 120−150 °C;
hardness: 61−64;
resistance to bending at a given level.

These parameters are required:

for quickly creating the desired hole;
to prevent the formation of defects, such as chips;
for long service.

When choosing a drill for a furniture euroscrew, you need to pay attention first of all:

for sizes;
to the manufacturer;
for the cost.

There are a lot of Chinese products on sale. It usually has a very attractive price, but the quality leaves much to be desired. The lack of reliability is usually explained by the following:

the steel used is not suitable for the working conditions;
the material has not been processed correctly.

Manufacturers from the Middle Kingdom often use any tool steel. As a result, the hardness quickly decreases and the drill becomes dull. When working, the master has to increase the pressing force. The material often breaks down and crumbles.

If the heat treatment of the drill is carried out incorrectly, it will be subject to bending. This usually occurs when you need to make several holes in succession.

Much more reliable are Russian confirmed drills made by:

LLC "Tula Tool Plant";
LLC "BSI-instrument"

From foreign ones , for example:

Archimedes (Switzerland);
DeWalt (USA).

Foreign products are at least twice as expensive. It is important to immediately determine some characteristics when purchasing:

The size of the smooth part of the confirmat and the depth of the drill seat must be the same.
It is desirable that there are as few roughnesses on the feathers as possible.
Part of the countersink stop is at an angle of 45°, the transition to the thread is smooth.
The quality of the holes in non-demountable and collapsible designs is the same. However, the last option is more convenient. It is suitable in different cases, since the confirmation varies.

Only a tool with high power is suitable for the job. Euroscrews can also be tightened “according to the old-fashioned method” described at the beginning of the article. However, this will require significantly more effort, time and skill. Therefore, many people opt for confirmed drills. From the variety of products you can always choose something suitable.

How to choose a drill for a Euroscrew (confirmed)

Screws, screws, self-tapping screws, etc. are used everywhere, however, to assemble furniture you need not only the skills and experience of a craftsman, but also high-quality specialized fasteners. One of the most popular methods of fixing parts is the technology using a Euroscrew (confirmat).

This fastener allows you to securely attach to the material in one operation. You just need to make a geometrically correct hole. To do this, you need a special drill for confirmat (euroscrew). Its dimensions are strictly defined. The product is unified to a single standard, therefore, it can be easily replaced with a similar one from another manufacturer.

Externally, a Euroscrew resembles a screw, from which it fundamentally differs in the diameter and shape of the cut tooth. This design feature allows you to increase the area of contact with the body of the fastened part several times. As a result, connection reliability increases significantly.

One confirmat replaces 3-4 screws of the same length. For furniture made from chipboard, the figures are even more impressive. The middle of the sheet is the loosest part of the material. A thin screw is not able to securely fix itself. The Euroscrew, due to its larger diameter, grips harder layers of chipboard and it is no coincidence that manufacturers clearly give preference to it.

Manufacturers offer a line of products with different sizes for different types of connections. Not all models can be found in the store. Some are used only for special purposes. They can be ordered or purchased at specialized retail outlets.

The method of twisting the confirmat depends on the shape of the head. It can be hexagonal or cross-shaped. For euroscrews of small diameter (5 mm) a 3 mm wrench is used, and for large products (7 mm) a 4 mm wrench is used.

In accordance with the table, the dimensions of the drill are determined. Depending on the material, the hole for the thread is made either 3.5 mm or 4.5-5 mm. The confirmatory head requires a diameter of 5 mm and 7 mm, respectively, depending on the brand.

Design features of drills for confirmations

Among imported products, products made from HSS 4341 have excellent performance. The abbreviation stands for High-Speed Steels, that is, just like P9M5 and P18, it is high-speed steel.

It is most convenient to use a finished product, where the diameter of the drill is precisely selected for the confirmation and there is an additional cutting edge for the head, where there is no thread, and to create a chamfer for the head. The design increases productivity several times.

Three operations are performed in one pass. You can use a set of drills of the required diameter. However, for better performance it needs to be improved. The factory device has a sharper sharpening angle of the cutting edges. This makes the approach easier and more accurate.

How to choose a drill for a Euroscrew (confirmed)

However, often in the practice of home craftsmen there is a situation when they have to work with what is available. It is strongly not recommended to use drills of a smaller diameter - for confirmations 5x40, 5x50 this size is 3.4 mm, and for products 7x40, 7x50, 7x60, 7x70 - 4.5 mm.

The head of the confirmat is measured, the part that is inside the product but does not have a thread. It may vary slightly between different manufacturers. The diameter ranges from 6.3mm to 7mm. Which confirm drill should I choose in these cases? The factory device is designed for a diameter of 7 mm.

A little play is sometimes even convenient. If there are minor errors, the connection can be loosened, the position of the part adjusted and the screw tightened again. Even a hole a millimeter larger than 8 mm will not impair the reliability of the fastener.

How to drill a hole for placing a confirmat

The confirmat is screwed into a previously prepared hole, so the question of how to drill such a hole is quite relevant. To do this you will need the following tools and materials:

screwdriver or electric drill;
bit of the appropriate size;
drill for confirmation;
a measuring tool, which can be a ruler (or a construction tape);
pencil;
awl.

To facilitate marking and maintain a strictly perpendicular position of the drill, use a template for drilling holes for confirmat

Hole dimensions for Euroscrew

For furniture assembly, Euro screws are usually used, the dimensions of which are 6.4x50 mm. To make holes for such a confirmat, the outer thread diameter of which is 6.4 mm, and the cross-sectional size of the screw body is 4.4 mm, a drill with a diameter of 4.5–5 mm is used. Drilling holes for confirmation of this type should be performed to a depth of at least 50 mm. If the diameter of the hole is larger than the specified value, then the Euroscrew simply will not hold; if it is smaller, it can tear the furniture element into which it is screwed.

The step drill is selected based on the dimensions of the specific Euroscrew model

The drill used to make holes for the confirmation must be equipped with a special working head. On the one hand, she prepares an expanded hole for the neck of the screw, on the other hand, she countersinks the place where the screw head will be placed. To place the confirmat, you can also use a regular drill, but in this case it is necessary to prepare places for the neck of the fastener and its head.

Marking drilling locations

The reliability and quality of connections made using confirmats largely depend on the accuracy of marking future holes for them. On the element that will overlap the end of another element of the furniture structure, two types of markings are made:

drilling depth (5–10 cm);
the center of the future hole (if the thickness of the joining part is 16 mm, it should be at a distance of 8 mm from the edge of the slab).

Drilling diagram for Euro screws

To mark the drilling locations as accurately as possible, you can use the following simple technique: after preliminary marking, a through hole is made in the applied part, through which, by attaching the first part to the second, a rotating drill is used to mark the location of the second hole for the European screw.

Making holes

In order to make the holes for placing confirmations as efficiently as possible, it is advisable to follow the recommendations below.

Before drilling a part, you need to place a piece of unnecessary chipboard under it: this will prevent chips from appearing at the exit of the hole being created.
The formation of places for the neck and cap of the confirmat in an already made hole can be done by holding the workpiece in weight.
When drilling both in the layer of the part and at its end, the drill is positioned strictly perpendicularly. This will allow you to get a high-quality result and not damage the part.
When drilling two parts simultaneously, they must be securely fixed in the required position, for which you can use clamps and other clamping devices. This is the most accurate and fastest way to create confirmation holes.
When drilling holes for dowels, it is advisable to equip the tool used with a depth limiter, which will prevent damage to the workpiece by drilling through them.

Recently, the confirmat screw, or as it is often called, the Euroscrew, has become a common furniture fastening. This is a simple but fairly reliable type of fastener that can significantly speed up the furniture assembly process. However, despite their simplicity, there are certain subtleties when working with Euroscrews regarding the preparation of holes for them.

What kind of drill to drill for a Euroscrew?

The main fastening element in furniture assembly is the confirmat. It is screwed in with pre-drilled holes. It is the drilling of assembly holes in chipboard for confirmations that we will consider in this article.

Necessary tool

To assemble the chipboard parts we will need:

Screwdriver
Confirmation bat
Ruler or tape measure
Pencil and awl

Hole depth and width

When usually using confirmat, size 6.4 * 50, because the thread diameter is 6.4 mm, and the diameter of the confirmation body is 4.4 mm, then for high-quality fastening of parts, the hole diameter must be in the range of 4.5-5 mm, and at least 50 mm deep.

If the thickness of the hole is greater than the specified one, the confirmat will not hold the parts well; if it is less, its thickness can tear the chipboard.

For drilling, use a confirmat drill with a diameter of 4.5 mm, which is equipped with an additional head for drilling an enlarged hole for the neck of the confirmat, which also makes a countersink for its head.

Of course, you can use a regular drill with a diameter of 5 mm, but for high-quality fastening, you will additionally need to make space in the hole for the neck of the confirmat and its head.

In order to perfectly fasten two parts, it is necessary to mark the places of their fastenings as accurately as possible.

On the part that will be adjusted to the end (the one on which there will be a through hole), you need to make two measurements - along the length (usually 5-10 cm) and from the edge - exactly 8 mm (this is if the thickness of the plate is 16 mm).

On a part that lies perpendicular, mark the drilling point at the end. Here you need to maintain the same distance in length (5-10cm from the beginning), and in width - strictly in the center (8 mm from the edge).

Markings must be done as accurately as possible, especially along the length, because If the markings are incorrect, your parts may have extra gaps or protrusions when joined.

It is better to make a through hole in the first part, attach it to the second and immediately use a drill to mark the drilling location at the end of the second part, and then separately, calmly drill the hole.

We make a hole at a distance of 8 mm from the edge, the drill must be held strictly perpendicular to the surface.

Before making a through hole, place a piece of unnecessary chipboard under the part, this will prevent chips from appearing on the back side.

When the through hole is made for drilling holes for the neck and cap of the confirmat, the part can be drilled while hanging.

As you know, the main fasteners in assembling furniture with chipboard or MDF are confirmats. And they are screwed in with preliminary drilling of holes of the required size. It is the drilling of an assembly hole in a chipboard for confirmation that we will consider in this article.

Necessary tool

To assemble parts with chipboard you will need:

Electric screwdriver;
Bit or key for confirmation;
Special confirmation drill;
Measuring tape or ruler;
Awl and a simple pencil;
The required number of confirmations (in accordance with the details).

Depth and width of holes

1.	Diameter	6.3 mm	7.0 mm
2.	Thread pitch (B), mm	2,40	3,00
3.	Thread diameter (D), mm	6,10 — 6,30	6,72 — 7,05
4.	Body diameter (d), mm	4,40	4,70
5.	Tip diameter (d2), mm	4,20 — 4,30	4,45 — 4,55
6.	Length of threadless section (T), mm	2,40 — 4,80	3,00 — 6,00
7.	Head diameter (P), mm	9,50 — 10,30	9,50 — 10,30
8.	Head height (H), mm	7,00 — 9,00	10,00 — 12,00
9.	Wrench size (M), mm	4,02 — 4,12	4,02 — 4,12
10.	Slot depth (h), mm	2,72 — 3,20	2,72 — 3,20

To assemble furniture, as a rule, confirmats measuring 6.4x50 millimeters are used, since the full diameter of the thread is 6.4 millimeters, and the diameter of the body of the confirmat itself is 4.4 millimeters.

Therefore, for high-quality fastening of furniture parts with chipboard, the diameter of the holes for confirmations must be at least 4.5 millimeters and at most 5.0 millimeters and the depth, respectively, is not less than 5.0 centimeters.

Otherwise, for example, if the diameter of the hole is larger than the designated one, then the confirmat will not hold the part properly; if it is smaller, then there is a very high risk that the confirmat, with its thickness, will tear the part from the chipboard.

To drill holes, use a special confirmation drill, the diameter of which is 4.5 millimeters. This drill is equipped with an additional head for drilling an enlarged hole for the neck of the confirmat, and which also performs a countersink for its head.

Naturally, you can use a regular wood drill with a diameter of 5 millimeters, but for high-quality fastening you will have to additionally make a hole with a larger diameter drill for the neck of the confirmat, and then a countersink for its head. All this is possible, but very troublesome.

Marking the places for drilling holes for confirmations

In order to ensure high quality, you need to mark the places of their attachment as accurately as possible.

For example, for parts that are adjusted at the end, these are those on which there will be through holes, you need to take two measurements, one along the length, usually 5.0-10.0 centimeters, and the second from the edge exactly 0.8 centimeters (since the thickness of our part with chipboard is 1.6 centimeters, you may have a different one).

The hole in the part, which lies perpendicular to the end, is drilled accordingly and the marking occurs at the end of the part. Therefore, we maintain exactly the same distance in length, namely 5.0-10.0 centimeters, and in width strictly in the center of the end of the part, 0.8 centimeters from the edge, respectively.

The most accurate marking is needed not only for high-quality joining of parts, but also if the marking is incorrect, and subsequently the joining of parts, there may be extra protrusions or gaps.

Therefore, in order not to make mistakes with the calculations, drill a through hole, then correctly join the parts and use a drill to mark the drilling point at the end. Then remove one part and confidently drill a hole in the end of the part.

Drilling in the plane of the part

Make a mark (0.8 centimeters from the edge and 5.0-10.0 centimeters along the part) and then use an awl to make a recess at the intended point, this is necessary so that the drill does not “run” at the beginning of drilling.

When drilling, make sure that the drill is strictly perpendicular to the surface of the part.

And in order to prevent a chip from forming on the back side during the through drilling process, you need to place a piece of chipboard you don’t need under the part.

When you drill the part, remove the placed piece of chipboard all the way through and place something thicker under the part so that the part is suspended, and continue drilling a hole for the neck and cap of the confirmat.

Drilling holes in the end of the part

As in all cases with drilling holes, the most important rule is that the drill must be strictly perpendicular to the part. In the case of drilling at the end of a part, everything is even more complicated and you need to act extremely carefully, otherwise the drill may “go” to the side, thereby ruining the part.

When drilling a hole in the end of a part with chipboard, it is necessary to pull out the drill so that chips do not clog into the hole.

Drilling holes in two parts at the same time

This drilling option is considered the most accurate and, in addition, the fastest. Before you start drilling two parts at the same time, you need to securely fix them, and for this you will need special clamps, a clamp or other device.

Drilling accessories

In order not to waste time each time marking 08 centimeters from the edge both in the plane and along the end of the part, you can use a special device, which, by the way, is very easy to make yourself. This device can be described in a few words - it is a kind of wooden template with a metal tube for a drill inside.

It looks something like this:

Naturally, there are more professional tools, for example, like this “drilling jig”

Installation Rules

Many who come across confirmations for the first time have a logical question regarding which holes to drill for the Euroscrew being used and how this procedure is generally performed.

There shouldn’t be any problems with how to drill holes if you have previously worked with a drill and understand the principle of its operation.

Before installing the confirmation in the furniture body, it is necessary to make the appropriate markings. To apply it you will need a jig or a template. With their help, you can significantly speed up the work and also achieve a high level of accuracy. If you are doing simple markings, you will not need a jig (template).

For proper installation of the confirmat, it is recommended to find out in advance about the material of the furniture itself, as well as about the design features of the euroscrew. A total of 3 holes are needed:

under the threaded screw part;
for the smooth part of the euro head;
under the hat.

A drill of the appropriate diameter is used for each hole. It is the time required to create several holes that makes you spend much more time assembling furniture.

But there is a solution. It is presented in the form of a special drill, which is intended specifically for confirmations. Finding it in Leroy Merlin or in any other furniture fittings store will not be difficult. The peculiarity of a special drill is that it allows you to prepare 3 different holes simultaneously in one go. This is due to the design of the drill itself.

Nuances of fasteners

Carrying out even the simplest work of fastening two pieces of furniture requires the performer to have special professional skills. The holes for the screed are created with drills, the sizes of which are 4 and 6 mm. A stepped cutter is used under the head. Experts advise turning to this option - it makes it possible to make the required hole of the correct size in one movement. It is advisable to use tools with high speeds. Low ones will lead to the formation of chips in the hole - the drill will pull them there.

It is recommended to pay attention to removing the drill - unwanted chips may appear. They will not be critical if the screw has a wide head that hides all the defects of the work. Such fasteners will provide the highest degree of adhesion. When working with confirmats for the first time, you should do everything manually; if high resistance to the screw occurs, you can easily remove it from the mating parts of the furniture without damaging them.

The quality of the connection will also depend on the accuracy of the markings on the furniture. All specialists approach this step with full responsibility. On a part of a part placed overlapping the end of another, two types of markings are performed:

the depth of the drilled hole is 5-10 cm;
the central part of the hole should be located from the edge at a distance of ½ part of the thickness of the part being connected.

On the part to be joined, the markings are placed on the end part, strictly in the center of the furniture board.

The most accurate marking can be done by drilling a through-type hole in the applied part. Next, by attaching a second element to it, mark the location of the hole intended for the European screw. This way the assembly will be as smooth as possible. At the marking stage, to make work easier, a template is used to drill holes for confirmation

Plugs for confirmation

This type of plug allows you to completely cover the caps that remain on the surface of furniture parts. Used to give furniture a finished look or for decorative purposes. It can also be used to hide existing holes, and in case of detection of minor defects on the surface of furniture.

The types of plugs are:

self-adhesive;
plastic.

Color variations of the plugs are selected based on the basic tones of the chipboard. Self-adhesive plugs are more popular than plastic ones. They are completely faceless, but extremely easy to use. Their cost is almost the same. Plastic is used to make plastic plugs. The product has a diameter of 1.2 cm and a round shape. They are attached to a small ledge (hexagon), which leaves a confirmation behind it. Self-adhesive elements are considered more universal and are made of melamine. They also have a round shape. Another advantage of the plugs is their thickness, which does not exceed 0.4 mm and makes them almost invisible against the general background.

Confirmation sizes

The required parameters are usually calculated based on the external thread.

The disadvantage is that the fastener is not closed, the cap is visible.

When assembling furniture, confirmat 6.4*50 is used.

The most popular sizes of euroscrews:

length: 40 (mm), thread diameter: 5 (mm);
length: 50 (mm), thread diameter: 5 (mm);
length: 40 (mm), thread diameter: 6.3 (mm);
length: 40 (mm), thread diameter: 6.3 (mm);
length: 40 (mm), thread diameter: 7 (mm);
length: 50 (mm), thread diameter: 7 (mm);
length: 60 (mm), thread diameter: 7 (mm);
length: 70 (mm), thread diameter: 7 (mm).

The cost, in relation to any product, is a pittance.

It is not advisable to buy such a drill for “one-time” use.

The main thing here is to maintain all sizes. Otherwise, the confirmation will fall out, or, on the contrary, it will tear the chipboard, and you will ruin the furniture. The confirmation drill also makes a recess for the head. The holes are made strictly according to the markings and the drill must be held parallel to the surface. To avoid chipping, a sheet of chipboard or plywood is placed on the reverse side. An important point: when drilling the end of a part, the drill must be strictly perpendicular to its end, otherwise, if it deviates, the drill will move to the side and the part will be damaged. When drilling into the face of a part, the perpendicularity of the drill to the part is important. To avoid the drill coming off, use a regular awl. Using it, a small notch is made in the face and end. After connecting (pulling) the two parts together, they can be adjusted with a rubber mallet.

The connected parts on the screw will not sit tightly enough. Due to the fragility of chipboard, the use of screws does not meet expectations.

The use of such a drill is rational in case of a large volume of work and repeated use.

Another option is to drill the parts together. This method is not only fast, but also accurate. Only for this it is necessary to securely fix the parts using clamps. This way you save your time and speed up the assembly process.

Read also: Specific heat of fusion of brass

To connect two parts made of laminated chipboard (the thickness of one sheet is 16 mm), a euroscrew is used.

If you have a “confirmed” drill, the work is reduced significantly, but such a drill is quite difficult to find.

As a result, the use of confirmation is completely justified. No special tools are needed to install it. All you need to do is order the required number of confirmations. It is unlikely that you will get a high-quality screed the first time, but after making a couple of screeds, everything will work out. As they say, the eyes are afraid, but the hands do.

It is necessary to tighten two parts with a thickness of 16 mm.

On the second part we do the same, only we take a drill with a diameter of 4.5 mm.

It is unlikely that you will get a high-quality screed the first time, but after making a couple of screeds, everything will work out.

Confirmation drill – three in one

Working with a special confirmat drill (cutter) is much easier, since it has a special stepped geometry, and the entire operation is performed in one pass. An additional advantage of using it is that it simultaneously chamfers the countersunk head of the hardware. In fact, it replaces two drills and a countersink of different diameters. In addition, the confirmatory cutter has an insertion part with a sharp tip, which ensures precise insertion of the tool and eliminates the risk of it being pulled to the side at the beginning of drilling.

How to fasten with Euroscrews

To use confirmations, certain skills in working with such fasteners are required, as well as knowledge of the characteristics of the material from which the products being connected are made. Drilling for confirmation is performed with a tool whose diameter is 4.5–5 mm. In this case, it is best to use drills that have a stepped cutter attached, which allows you to immediately chamfer the location of the screw head. Using such a tool, you can get a finished hole in one pass. In this case, the cutter forms an ideal surface for the screw head, which cannot be said about the drill, which, when removed, can leave chips on the edges of the hole (they, however, will subsequently be covered by the confirmat head).

Euroscrew installation sequence

Euroscrews, when compared with other types of fasteners, provide more reliable fixation of the parts being connected. This is explained by the wider arrangement of threaded elements, which reliably cut into the material. Install confirmations manually, as well as using an electric drill with appropriate attachments or a screwdriver. For those who do not have experience working with such fasteners, it is better to install them manually, so that in case of excessive resistance of the screw, they can be able to remove it from the furniture elements being connected at any time.

Drills for confirmation (euroscrew)

The specific shape of the confirmat drill, with a characteristic expansion from a diameter of 5 mm to a diameter of 8 mm, allows you to make two holes at once in one go, for the narrow and wide part of the Euroscrew with a countersink for the head. “work” with this type of drill with both frontal and horizontal parts, drilling the end of furniture panels and front parts. It is important not to confuse the “face” with the “wrong side” during the process - otherwise, it will be difficult to hide untidy chips instead of a neat countersink into which the confirmation cap will “sink.”