How to drill a perpendicular hole with a drill

How to drill with a drill correctly and evenly

In areas such as repair, the ability to drill correctly is one of the basics. In addition to the general rules, it is important to take into account that the client has nuances when working with a specific material: concrete, tiles, metal, etc. What remains for our client to do? Issues related to drilling will be covered here.

• Selecting an electric drill:
• How to remove a drill from a hammer drill

As already mentioned, drilling is the most common activity for a repairman, if it is important to immediately learn a few basic rules associated with this activity.

• Use of suitable tools. There are many drills, each designed for a specific type of material. Therefore, you should not try to drill through wood the other way around. It is also important to consider the conditions in which the tool will be used. For example, when repairing interior spaces You can’t use industrial drills (it’s simply unsafe). It is important to take into account not resistance to moisture: for outdoor work you need a tool with IP34 class, if the climate in the area is humid, not IP32, if you have to work in good weather. IPX2/ is used indoors
• Qualified marking. Before starting any work, it is important to carefully and inaccurately mark the drilling locations with a marker. There is also the option of sticking paper tape under the marker so that the drill does not slip on the material.
• Selecting the required drilling speed. Here everything depends equally on the material and not on the diameter of the blade. If we are talking about very thin drills (with a diameter of less than three mm), then we need to work at low speeds, less than four hundred per minute. For other drills there is next rule: The thinner the drill, the faster the drilling speed required.

Today, it is important that the handle is securely attached to the shaft hand drill. The drill must also not be allowed to skew.

Subtleties of drilling for various materials

How to drill metal correctly (Video)

The first thing to start with is the selection of drills. They are distinguished by a sharp edge designed to allow the drill to easily penetrate the metal. Conventional metal drills are good for weak hard metals like copper, as it is also called aluminum, but for something harder (for example, stainless steel) you need to take products from titanium carbide or another chromium-vanadium alloy.

We should also talk about optimal speeds. A common mistake For beginners, the problem is using too many revolutions. In reality, medium speeds are used for hard metals: for example, brass one centimeter thick will be optimally drilled at a speed of 2000-2500 rpm.

Of course there are a few points that need to be covered. What you need:

• If a thin iron plate needs to be drilled, it must be secured between two pieces of wood. This is done so as not to break down.
• It is sometimes necessary to use lubricating oil, which provides cooling of the drill but does not facilitate the drilling process.
• If you need to make a hole in the pipe, it must be securely fastened. To ensure that the pipe does not flatten under the influence of the drill, a piece of hard wood should be placed inside.

If you follow these simple rules, then even a beginner will be able to perform high-quality drilling.

How to drill concrete walls (Video)

Most often you have to drill into walls, because without this it is impossible to hang a shelf, a cabinet, or install a cornice. It is better to use a hammer drill, as it is also called, for this. These tools are powerful enough to handle hard materials like concrete. in other words brick. However, if the wall thickness does not exceed 10-12 cm, then many can’t do it. However, there is no need to take risks if you only have a low-power tool at your disposal - if it comes into contact with concrete, it can simply break. When the drill is selected correctly, the following tips will be useful:

• #image.jpgBefore starting work, you should make sure that there are no other pipes at the drilling site that allow accounting (software) communications.
• The drills that are taken for such work are made of hard metals or alloys. The best option will become drills with.
• If during drilling you come across too dense areas of concrete, they need to be punched using a small hammer or a pin (punch).

Although it is eventually possible to drill using a drill, it should be done with caution. Otherwise, breakdowns are usually quite serious. It is better to use specialized tools for this purpose.

How to work with tiles using drills (Video)

Often people who do not have extensive experience in areas such as repairs are afraid to drill into such fragile material as tiles. However, this may be an urgent need, because you need something to attach a variety of cabinets and shelves in the kitchen, bathroom or toilet. Alas, to a large extent, the condition of the tile after drilling is determined not by the master who takes up the drill, but by the one who laid the tile. A competent tiler lays the tiles so that no voids form between the tiles and the wall. And then careful drilling will not harm the tile by any force. When there are “air pockets” between the wall and the tiles, the tiles are most likely to crack.

To be able to drill through the tiles correctly, you need to take a drill, masking tape, or a hammer drill (or a powerful drill with drill bits for concrete). Next you will need to do the following:

1. The drilling location is marked with a piece masking tape not a marker. The tape here was used to prevent the nail from sliding across the surface of the tile.
2. Drilling is carried out strictly perpendicular to the material. The number of revolutions should increase gradually: from minimum to 150-200 revolutions per minute. This way you will avoid damage to both the material and the tool.
3. It is important to ensure that the drill does not overheat. If smoke starts coming out, the drill needs to be cooled down immediately.

Read also

When the holes are made, of course insert dowels into them. This is done using a hammer.

Drilling cast iron - how to do it correctly (Video)

Cast iron is a fairly hard material, making it very difficult to drill. Already today cast iron products fragile, so it is important not to crumble them. Just like other materials, cast iron has its own subtleties regarding drilling.

• There's no rush. This is probably most important rule when working with cast iron. Ours needs to be done slowly, with extreme care and attention.
• The drill must be made of a very hard, not durable alloy; today, it is perfectly sharpened. If you set a goal for cast iron not to crumble, you need to take drills with an angle of 114-119 degrees.
• It is unacceptable for the drill to overheat. Sometimes they don’t pay attention to the fact that the instrument is overheated. This leads to poor quality, as it is also called, even breakdown.

How to drill a perpendicular hole with a drill | How to drill straight holes

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How to carefully drill through wood (Video)

Wood is one of the “simplest” materials to use with a drill. However, this issue, of course, has its own subtleties.

• The drilling speed directly depends on the type of wood. Loose, slightly hard wood varieties will be possible even with a low-power device. Of course, the role is not played by the expected diameter of the hole - the more complex it is, the more powerful the drill is needed.
• If you set a goal to make large holes, you need to use special core drills. Their diameter can exceed one hundred twenty mm. As for depth, approximately the crowns are suitable for materials with a thickness of up to 20-22 mm, but special models have become available that can cope with thicknesses of more than sixty mm.
• If you need to make a blind hole rather than a through one, then Forstner drills, which are available in diameters from one to five cm, are perfect for you.

We should also talk about drilling timber. Although it is convenient to fix it for further drilling, the large thickness of the material creates certain difficulties. Drilling timber for further fastening in the dowel holes. For standard timber eighteen cm thick, it would be much better to take a drill with a diameter of twenty-five mm and not a length of thirty-six cm. You will need to drill slowly, at low speeds. In terms of power, a 1300-1500 W drill is perfect. If the beam is not too long, then two holes on each side will be enough. When the length of the beam for the dowels is long enough, you will need to make an additional hole in the center. Once the holes are made, there is an option to hammer in dowels here if you have a small hammer or sledgehammer.

At what speed should you drill?

One of the important parameters when drilling is per minute. Speed, with busy) you need to drill, depends on the type of material not the type of drill. Meet general rule: the harder the material, the thicker the joint, the lower the number of revolutions per minute should be made. As for specific numbers, they can be seen in the table below.

This table is for conventional twist drills. For specific options (Frostner drill, etc.) drilling speeds various materials slightly different from those above.

How drill a hole exactly (Video)

A fairly common problem is that the drill slips off the mark without hole It is not done where it is convenient. Paper tape glued to the top of the tree helps combat this. Also, sometimes similar difficulties arise if you have to work with an overly thick drill. Then you should first make a recess in the material with a thinner drill, and then drill, resting against the mark you made.

It is important to control the quality of sharpening. If the edges are not sharp enough or sharpened unevenly, then problems with drilling accuracy may arise.

How to drill perpendicular and vertical hole

Although sometimes it is necessary to drill at an angle, most often vertical holes are made (of course, perpendicular to the surface). If your goal is to drill at a strictly ninety-degree angle, you must use special guides. They will allow you to drill perpendicularly without deviating in any direction.

The simplest guides allow you to make only vertical holes, but now there are no more complex designs allowing drilling at certain angles.

Perpendicular holes with hand drill

One not the biggest problem in drilling holes by hand drill- get perpendicular holes equal to an angle of 90°, not oval. Here is a suggestion on how to make a simple device that helps you make perfectly perpendicular holes with a drill, at the same depth, not without ovals. There is great advice to consider today that will help you decide which of the two ideas is better.

Ways to drill perpendicular holes.

First: You, you have seen this trick, when while drilling a hole you take any square wooden block without pressing the drill bit installed in the hole against it, you create the illusion that you have got a perfect straight hole . Right?

Second: Place the drill with the drill bit in the corner of the “T” shaped fixture. Align the drill bit with the hole mark, do not drill the hole. Let's take a closer look, determine the depth of your future hole, taking into account the depth of the hole and the length of the drill, cut identical rectangular wooden blocks from scrap lumber. I took two small rectangular pieces of wood. I connected them together with screws, formed a shape similar to the letter “T”, and formed a 90° angle inside. Now that the fixture is in the location of the future hole, install the drill bit without pressing it into the corner of the fixture and drill a hole. Now, as you can see, the drill is kept from tilting, rather than you just drilling the hole.

If you need to drill a hole of a certain depth? As can be seen from the photographs, of course, drill a hole to any depth, changing the length of the drill, or the height of the device blanks. As you can see from the video below, it was necessary drill holes three-quarters of an inch deep, that's what I did.

How drill a hole in the wall without tilting the drill? Homo habilis. Magazine for skilled people

Only initially it seems that drilling will not be difficult. If you need to get not a hole, specifically a hole, then the task turns out to be not so simple. A few tricks will help solve the problem.

First of all, what is the difference between a hole and a hole? The hole is drilled in a strictly defined place, and in addition has a certain size and direction. In other words, if what came out after drilling exactly corresponds to the master’s idea, then this hole. Otherwise there would be a hole.

It is especially difficult to make a good hole in the wall. You have to work with a drill in weight, often in an inconvenient place; I almost missed it - the drill didn’t go at an angle. How to drill a hole in a wall strictly perpendicular? It should be noted that the human eye quite accurately determines a right angle. When, the precision of the eye is completely sufficient for most drilling work needed in everyday life.

The whole problem is in such a section that the perpendicularity of the hole in the wall is determined by two right angles - vertically and not horizontally. But the human eye no longer has the ability to track this. The solution is to provide one of the right angles automatically, without human intervention. Then you will only have to watch one of the corners; it will be much easier not to do the job.

Most often, the horizontal drill is fixed. It is beneficial to place some kind of stand or table near the drilling site in order to move the drill along a hard supporting surface. Often, this can be done quite rarely, since the holes are made on different heights It's not often that you don't pick up a stand. A drill with a level greatly facilitates the work. After a little training, the holes turn out strictly horizontal.

Read also

If there is no level on the drill, then do not run to the store for a new one. It is quite enough to temporarily attach a small building level We attached it to the drill body with tape.

Additional original way based on the fact that the human eye can perfectly evaluate straightness various items. So, nettle, carpenters evaluate the evenness of the slats by “shooting” their gaze along the part.

For this purpose, a thin mirror is fixed above the hole drilling site. After a while, it is enough to position the drill so that the reflection of the drill seems to be its exact continuation, without bends or fractures.

If this condition is met, the drill will be strictly perpendicular to the mirror, and, therefore, not to the wall.

How to drill with a drill straight hole

Probably do-it-yourselfers use only a drill when working in other words even a screwdriver.

Therefore, the question of how to make an accurate, uneven hole with this tool does not arise often.

Most often, we need a perfectly level hole, a hole in the wall, so that the drilling goes exactly at ninety degrees. What to do if you only have a hand drill and no drill?

Here's a simple tip.

You will need a scrap of a block or board; you will probably have one at home. Its length is not at all that important, from ten cm to half a meter, the main thing is that several holes should fit on its surface. The thickness of the bar should start from three cm, thinner is not necessary because it will not be accurate, but at the same time there is no point in choosing anything particularly thick.

1. What you need is a block, then we take a ruler, as it is also called, a square, a pencil, we mark four equally spaced crosshairs in the center - these are places for holes (usually four are enough). We repeat this on a slightly different side of the block, keeping the dimensions in mind. Upon completion, you should be able to get points exactly located under each other.

2.7. Now we lay the block, try it on comfortably, do not drill, trying to keep the angle exactly.

When the four holes are ready, and this will take a couple of minutes, there is an option to check the template.

3. We turn it over and do not look at which of the holes turned out to be the most even, i.e. it exactly fell into the center of the marking on back side bar. It will be easy to determine the most ideal attempt thanks to the crosshairs (it was the first one in the photo).

In this case, in fact, everyone else, now we use the selected hole as a template for the walls, as it is also called, other surfaces.

I will add that this method is not used at other angles, but in such circumstances you will have to change the markings.

This is such a simple piece of advice, I’ve been telling it for much longer than it’s been done. He took a block, scratched it with a pencil, drilled it, selected it - it took a couple of minutes. But now you don’t know how to drill a straight hole using a drill using a “quick” homemade template.

Read also Like a regular drill and hammer drill? How's the wall? - the craftsmen probably asked this question when they had to hang shelves, cornices, etc. Concrete is a strong material and therefore can be drilled extremely poorly. Even how to drill a wall in a panel house may seem like an impossible task. Although, if you know certain secrets, this procedure...

Drilling a hole straight at a 90 degree angle is not an easy task. It may take a lot of effort to keep the drill level and vertical. BullseyeBore suggests doing this using several laser concentric rings.

The BullseyeBore drill uses a simple red laser to project three rings onto the surface where you intend to drill. To keep the drill as level as possible during the process, watch the three rings. The inner two will remain in the same position no matter how the drill is tilted, but the outer one can move. By aligning the position of the largest ring relative to the two smaller ones, you will ensure that the drill is in a strictly vertical position, and the hole will turn out just perfect.

In addition, concentric rings can provide information about the depth of the hole. The distance between the large and middle circles will precisely indicate the drilling depth. If at the beginning there is a picture like this:

In the middle of the process the circles will come closer together:

And in the end they will simply merge:

The attachment looks like a small transparent disk with a connector for easy installation on any drill. Lasers, optics and batteries are already built inside. The disc is smooth, lightweight and impact resistant.

Manufacturers are now developing a model where all the filling will be implanted into the drill chuck.

You can find out more about the project.

Drilling deep holes has always been a problem. This small device is designed to help manual and electric drill to drill deep holes through the center of a piece of wood, you know it's very hard. And the deeper the hole, the more difficult it is to drill. The problem often occurs in the hole itself and drilling
holes along the axis to the end of the bar. IN in this case, this simple device will help you confidently hold the drill in one direction and avoid the wandering center. Such drills tend to follow the path of least resistance. To solve this problem, use a special device, which is shown in the photo above. The device will keep the drill from changing direction in the wood. These drill bits are good enough to drill holes in coniferous trees wood, but they are not so good at hardwoods trees and require frequent sharpening of the drill. Drill bits are available for sale in stores and come in a variety of diameters and different lengths, they allow you to drill holes up to 400 mm deep.

How to drill deep holes correctly.

Minor drill change. When modifying an auger drill, start by stripping the guide screw. Then blunt the edges as shown in the photo below. This modification will provide a slight “bite” and without being too aggressive helps to drill deep holes in a straight direction.

Alignment. Straight metal rod, aligns V-block with inspection hole.

Start with the pilot hole. Another problem is drilling deep holes, setting a straight hole as a guide. A drill press is a seemingly logical tool that can be used to drill straight holes, but it has a limited drilling depth. However drilling machine still plays a large role in this operation and serves to drill the pilot hole. I start drilling the hole with a drill of a smaller diameter and gradually increase the hole to the diameter that I plan to use.

When the drill chuck rests on the V-block, remove it and drill a hole the full length of the drill bit or the depth of the hole.

Keep the drill straight. Once the pilot hole is ready, install the drill bit into the drill required diameter, secure the workpiece on the workbench with clamps. Remember that even if you have a good and tight hole, moving the drill bit from the center while drilling will not save it. To help guide the drill into the hole along the axis line, a V-block is made. To adjust the alignment, take a long metal rod and insert it into the pilot hole as shown in the photo above, align the V-block in line with the rod in the block and secure with a clamp. I start drilling holes with a drill at low speeds. Don’t be lazy and often clean the drill from sawdust clogging the auger, this gives easy rotation to the drill and helps to guide the drill correctly. Once the drill chuck rests against the V-block, remove it and continue drilling the hole. Performing these simple and not complicated techniques allows you to get excellent results.

In the process of drilling recesses, a situation often arises in which it is not easy to obtain perfectly straight corners. How to drill a perpendicular hole of a certain depth? To do this, you should use these tips experienced craftsmen. They offer several options for getting out of this situation.

There is practically no carpentry work that does not involve the use of a drill and fasteners. During the drilling process, it is worth knowing about the important principles of this activity:

• you only need to drill a hole at a given point;
• the hole has a set size;
• at the time of drilling, the tool should be positioned at a right angle.

If all of the above requirements are clearly met, we can speak of success in the work:

• use of special drills;
• clear fastening of the material will help to secure the work and make it significantly easier;
• uniform pressure on the drill.

So, for these purposes you can use wooden block square shape, press the drill and drill bit firmly against its base and perform the desired action.

Another method also involves using homemade device, only it looks like the letter “T” with internal corner at 90 degrees.

Drilling methods: partial holes in products in pairs (a); using an attachment plate (b); c - holes in the corner; g - in planes located at an angle; d - on a cylindrical surface; e - in hollow parts.

The drill is placed at one of these points and placed on the mark, after which drilling is performed. Taking into account the length of the drilling device, the depth of the groove is determined.

To get an accurate hole at a right angle, you can use a guide. Its strictly fixed position will allow you to avoid mistakes and deviations from the given angle. Certain varieties of such tools help to make grooves not only vertically, but also while maintaining other angles.

The nozzle has a depth-limiting device, adjustable with a stopper and a spring. The purchase of such a tool will protect against damage to workpieces and furniture.

Using a Conductor

Drill deep hole a perpendicular sample can be used using special device- conductor. Moreover, such activities are carried out not only on a flat base, but also on the rounded parts of the workpieces, in corner points.

Components of the conductor:

1. A core that allows you to make markings for a drill.
2. Plastic stencil.
3. There are 6 guide bushings, the diameters of which correspond to 4 mm, 5 mm, 6 mm, 8 mm, 10 mm, 12 mm.

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Features of the position of the jig for drilling in different areas of workpieces

1. For rounded parts, a recess without corners is used, located on the bottom of the device.
2. At corner points and on cylinders it is worth using the V-shaped element included in the kit.
3. To fix the middle end line of the part, you need to install 2 nails in the corresponding grooves at the corner points of this device. The jig is rotated so that the fasteners connect to the edge of the element. The central part of the sleeve, intended for drilling a hole, is placed in the middle of the end part of the part.

A core is taken to mark the center point of the groove.

1. Place the named element in the middle of the hole and fix the stencil on it.
2. Place the bushing on this post with the flared part up, its diameter corresponds to 4 mm, and insert it into the template. Such a part must be centered and pressed against the material using a clamp.
3. Remove the core along with the bushing from the template, which should not move.
4. The guide sleeve is placed in a stencil of a certain cross-section.
5. Using a drill, a hole of a certain depth is made.

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Making a homemade device

Devices for drilling wood: a - use of a stop for drilling holes in round blanks; b - use of a stop for drilling holes in a vertical plane; c - template for drilling the end and plane of the workpiece: 1 - workpiece; 2 - template; 3 - holes in the template; 4 - clamp with which the template is attached.

In practice, drilling a groove at a right angle can be very difficult. Often, many craftsmen use special devices for this. However, these options are often designed for specific types of drilling equipment. Some are suitable for hand drills with seats for additional pens, and others for rechargeable pens.

Meet and universal options, however they are expensive. People who make furniture cannot do without this device. For a person who makes something on rare occasions, the cost will be quite high.

You can make such an assistant yourself, from the remains of chipboard. The initial blank of such a device looks like bars stuffed on the base of this material.

Here later you need to help the drill find the correct point and angle of inclination. A small part of the material is installed end-to-end on the main panel.

Before assembling the device, it is worth making a mark for 3 holes with different sections.

Take 3 screws, the diameters of which correspond to 5 mm, 6.3 mm and 7 mm. According to these dimensions, grooves are drilled at 3.5 mm, 4 mm and 4.5 mm.

Next, the device is assembled. Holes are drilled for the first holding component, which is immediately secured. Afterwards, a groove is made for another holder. At the time of drilling, a chipboard block is placed between these two parts to create more accurate results for the second element. The device, made independently, must be strong and should not move in all directions.

Such a device will allow you to make grooves only as a drilling device to create right angle at the end of the panel. To center the drill and drill a hole on a flat base, a additional device. To do this, 3 holes with a diameter of 3.5 mm, 4 mm and 4.5 mm are drilled in a chipboard block. Next, marks are fixed on the prepared panels, the drill must pass through the object, and a groove is outlined.

As soon as the markings are made correctly, you need to lower the device onto the panel and place the drill, maintaining a right angle. Now you can drill.

The grooves in the end part are made in the same way. The drill passes through the assistant, the hole is marked, the structure is firmly connected to the side of the manufactured object, after which the drill can be used.

In the repair industry, the ability to drill correctly is one of the basic skills. In addition to the general rules, it is important to take into account all the nuances when working with a specific material: concrete, tile, metal, etc. All issues related to drilling will be covered in this article.

As already mentioned, drilling is the most common activity for a repairman, and therefore it is important to immediately learn a few basic rules associated with this activity.

• Use of suitable tools. There are many drills, each of which is designed for a specific type of material. Therefore, you should not try to drill concrete with a wood drill and vice versa. It is also important to consider the conditions in which the tool will be used. For example, industrial drills cannot be used for interior repairs (this is simply unsafe). It is also important to take into account resistance to moisture: for outdoor work you will need a tool of class IP34 if the climate in the area is humid and IP32 if you have to work in good weather. IPX2/ can be used indoors
• Correct markup. Before starting any work, it is important to carefully and accurately mark the drilling locations with a marker. You can also put paper tape under the marker to prevent the drill from slipping on the material.
• Selecting the required drilling speed. Here everything depends equally on both the material and the diameter of the blade. If we are talking about very thin drills (with a diameter of less than 3 mm), then you need to work at low speeds, less than four hundred per minute. For other drills, the following rule applies: the thinner the drill, the higher the drilling speed required.

It is also important to ensure that the handle is securely attached to the shaft of the hand drill. The drill must also not be allowed to skew.

Subtleties of drilling for various materials

How to drill metal correctly + (Video)

The first thing to start with is the selection of drills. They are distinguished by a sharp edge designed to allow the drill to easily penetrate the metal. Regular metal drills are good for not too hard metals like copper or aluminum, but for something harder (for example, stainless steel) you need to take products made of titanium carbide or chrome-vanadium alloy.

We should also talk about optimal speeds. A common mistake beginners make is using too much large quantity rpm In fact, for hard metals, medium speeds are used: for example, brass one centimeter thick will be optimally drilled at a speed of 2000-2500 rpm.

There are a few more points to cover. So:

• If a thin iron plate needs to be drilled, it must be secured between two pieces of wood. This is done so that the sheet of metal does not tear off.
• It is necessary to use lubricating oil from time to time to cool the drill and facilitate the drilling process.
• If you need to make a hole in the pipe, it must be securely fastened. To prevent the pipe from being flattened by the drill, a piece of hard wood should be placed inside.

If you follow these simple rules, then even a beginner will be able to perform high-quality drilling.

How to drill concrete walls + (Video)

Drill into walls everyday life it is necessary most often, because without this it is impossible to hang a shelf, a cabinet, or install a cornice. Of course, it is better to use a hammer drill or impact drill for this purpose. These tools are powerful enough to handle hard materials like concrete or brick. However, if the wall thickness does not exceed 10-12 cm, then you can get by a regular drill. But you shouldn’t take risks if you only have a low-power tool at your disposal - if it comes into contact with concrete, it can simply break. If the drill is selected correctly, then the following tips will be useful:

Although drill concrete wall using a drill is generally possible, but you should still do it with caution. Otherwise, the damage can be quite serious. It is better to use specialized tools for this.

How to work with tiles using a drill + (Video)

Often people who do not have extensive experience in the field of repairs are afraid to drill into such a fragile material as tiles. However, this can become an urgent necessity, because you need something to attach various cabinets and shelves in the kitchen, bathroom or toilet. Alas, in many respects the condition of the tile after drilling is determined not by the master who takes up the drill, but by the one who laid the tile. A competent tiler lays the tiles so that no voids form between the tiles and the wall. In this case, careful drilling will not harm the tile in any way. If there are “air pockets” between the wall and the tile, then most likely the tile will crack.

In order to properly drill through the tiles, you need to take a drill, masking tape, or a hammer drill (or a powerful drill with drill bits for concrete). Next you will need to perform the following steps:

1. The drilling location is marked with a piece of masking tape and a marker. The tape is there to prevent the nail from sliding on the surface of the tile.
2. Drilling is carried out strictly perpendicular to the material. The number of revolutions should increase gradually: from the minimum possible to 150-200 revolutions per minute. This way you can avoid damage to both the material and the tool.
3. It is important to ensure that the drill does not overheat. If smoke starts coming out, the drill needs to be cooled down immediately.

Once the holes are made, you can insert dowels into them. This is done with a hammer.

Drilling cast iron - how to do it correctly + (Video)

Cast iron is a fairly hard material, so drilling it is very, very difficult. In addition, cast iron products are fragile, so it is important not to crumble them. Like other materials, cast iron has its own subtleties when it comes to drilling.

• There's no rush. This is perhaps the most important rule when working with cast iron. Everything must be done slowly, with extreme care and attention.
• The drill must be made of a very hard and durable alloy, in addition, it must be perfectly sharpened. To prevent cast iron from crumbling, you need to take drills with an angle of 114-119 degrees.
• It is unacceptable for the drill to overheat. Sometimes they don’t pay attention to the fact that the instrument is overheated. And this can lead to poor quality work or even breakdown.

How to carefully drill through wood + (Video)

Wood is one of the “easiest” materials when working with a drill. However, there are some subtleties here too.

• The drilling speed directly depends on the type of wood. Loose, not too hard types of wood will be suitable even for a low-power device. Of course, the expected diameter of the hole also plays a role - the larger it is, the more powerful the drill is needed.
• In order to make large holes, you need to use special core drills. Their diameter can exceed 120 mm. As for depth, on average crowns are suitable for materials with a thickness of up to 20-22 mm, but there are also special models that can cope with thicknesses of more than 60 mm.
• If you need to make a blind hole rather than a through hole, then Forstner drills, which are available in diameters from 1 to 5 cm, are perfect for this.

We should also talk about drilling timber. Although it is convenient to fix it for further drilling, the large thickness of the material creates certain difficulties. Drilling timber for further fastening in the dowel holes. For a standard beam 18 cm thick, it would be best to take a drill with a diameter of 25 mm and a length of 36 cm. You will need to drill slowly, at low speeds. In terms of power, a 1300-1500 W drill is perfect. If the beam is not very long, then two holes on each side will be enough. If the length of the beam for the dowels is long enough, then it will be necessary to make an additional hole in the center. After the holes are made, you can drive the dowels into them using a hammer or small sledgehammer.

At what speed should you drill?

One of the important parameters when drilling is the number of revolutions per minute. The speed at which you need to drill depends on the type of material and the type of drill. There is a general rule: the harder the material and the thicker the joint, the lower the number of revolutions per minute should be. As for the specific numbers, they can be seen in the table below.

This table is for conventional twist drills. For specific options (Frostner drill, etc.), the drilling speeds for various materials are slightly different from those given above.

How to drill a hole straight + (Video)

A fairly common problem is that the drill slips off the mark and the hole is not made in the right direction. in the right place. Paper tape glued to the top of the tree can help combat this. Also, sometimes similar difficulties arise if you have to work with an overly thick drill. Then you should first make a recess in the material with a thinner drill, and then drill, resting against the mark you made.

It is important to pay attention to the quality of sharpening. If the edges are not sharp enough or sharpened unevenly, problems with drilling accuracy may occur.

How to drill a perpendicular and vertical hole

Although it is sometimes necessary to drill at an angle, it is most common to make vertical holes (that is, perpendicular to the surface). In order for drilling to take place strictly at an angle of 90 degrees, it is necessary to use special guides. They will allow you to drill perpendicularly without deviating in any direction.

The simplest guides allow you to make only vertical holes, but there are also more complex designs that allow drilling at certain angles.