Drills and drills for concrete

Features of the choice of drill

For the correct choice of a device, several characteristics must be taken into account:

• drill length;
• diameter of the working part.

The design has a reinforced filling, since it is designed to work with especially strong materials. There is a double spiral on the working part. This allows you to increase the durability of the structure, regardless of the number of applications of the drill. Some models are equipped with a special tip made of VK8 alloy. These options are suitable for processing high strength substrates.

Before choosing a drill, read the product labeling. For example, data 6 × 160 is deciphered as: working diameter is 6 mm, length is 160 mm. Be sure to keep in mind that the last indicator indicates a working length, which is slightly less compared to the working part.

Diameter indicators vary from 4 to 30 mm. The most common options range from 6 to 10 mm. Using such a drill, you can prepare a hole for mounting a dowel.

First of all, before choosing, determine the strength of the material that you plan to process. Keep in mind that for preparing a deeper hole, it is better to increase the twist of the spiral part. It also features increased drilling speed and facilitates the efficient removal of waste materials from the work area.

We offer some tips from the masters to help you quickly and correctly choose a drill for concrete:

• For the preparation of shallow holes, products with gentle spirals are suitable, which are distinguished by their strength and durability.
• It is better to buy a tool from trusted manufacturers and not save money. Poor quality products wear out quickly and may not fit the power tool.
• Concrete bases are drilled, not drilled, so the tool must be reliable.

When buying a drill, it is necessary to take into account GOST, as well as the price range. Specialty stores have expensive and cheap tools that vary in durability. The highest quality products are considered to be from the manufacturers Bosch, Sturm and Makita.

There is a division into categories according to the purpose of the drill:

Auger. Used to prepare deep holes. The design allows for minimal waste of material and does not stress the power tool.
With a high degree of slope of the groove. The use of such options allows you to work at the highest possible speed. This ensures productivity while drilling holes

When choosing, pay attention to the fact that in this case the load will be higher than when using an auger auger.
With a low degree of slope of the groove. Such products are designed for long-term operation, therefore, they have an increased resource.
Crowns

With the help of crowns, it is possible to make large holes in solid bases. Diamond drills and carbide-tipped options are available.

It is best to lubricate the shank thoroughly before installing the drill. This ensures the durability and efficiency of the tool.

Design features

Shank. It is inserted into a special fastening socket of the perforator and is securely fixed in it with the help of special longitudinal grooves. Drills have some differences among themselves in their design features, depending on the type of fastening system.

Body. Carries the main rotating load, therefore, for reliability, it is made of high-strength steel alloys.

Cutting part. Used for basic punching work.In this case, the design of the tip can be of the most different shapes.

Drill retention systems

The fastening system, which is divided into 5 types, also depends on the model of the perforator used for drilling and its design of fixing the drill in the chuck:

1. SDS - used for a drill with a shank of 10 mm in diameter, which has two transverse grooves, with the help of which it is fixed in the socket of the chuck.
2. SDS-plus is one of the popular fastening systems where a drill for a concrete hammer drill is inserted, the dimensions of which are 10 mm in the tail section. The shank itself has 4 transverse grooves, of which two are closed and are fixed by movable balls.
3. SDS-top - This system is quite rare. Used for drills in concrete for rotary hammer with 14 mm shanks. Medium power rock drills are equipped with such a fastening system.
4. SDS-max - used for fixing drills on heavy duty professional rotary hammers, working with drills, which have a mounting shank diameter of 18 mm.
5. SDS-quick is an uncommon system for fixing rotary hammer drills. Its special difference from other fasteners is in the drill shank, which does not have grooves, but instead of them there are longitudinal protrusions.

How to choose the right one

Before choosing a diamond drill for concrete, the density of the material in which the drilling will be carried out should be assessed. In this case, it is necessary to take into account the depth and pitch of the ribs of the drill spiral - the higher these values, the deeper and at a higher speed the hole can be drilled. Such characteristics allow faster removal of waste material residues from the drilled area. Naturally, all this together increases labor productivity.

The length of the hammer drill is selected taking into account the depth of the planned hole that will be drilled.

To facilitate the selection of a hammer drill, you need to use the parameters indicated on the drill marking. For example, on the drill label there is a digital designation 8x260. This will mean that it has a working diameter of 8 mm and a length of 260 mm. But it should be remembered that the markings do not indicate its total length, but only the working part of the drill, which is slightly less than the total.

If shallow holes are drilled, it is better to use drills that have a flatter spiral design, they are much stronger and more durable than long drills.

It is better to choose and buy from manufacturers who have long mastered the market of construction tools and have won high prestige. Products from little-known manufacturers are not always of good quality, especially when it comes to fastening systems for hammer drills.

The most famous manufacturers

The whole variety of drills for hammer drills can be roughly divided into two completely different categories. The first is the official one from a well-known manufacturer. The second category is non-original, which does not have a quality certificate and the manufacturer is practically unknown.

So it's better to deal with trusted companies such as:

Makita. The drills produced by this company have four cutting edges with a tapered center, which ensures the accuracy of the drilled hole along the longitudinal axis. And the longitudinal fastening grooves, in comparison with other models, have a smaller inclination of the side walls.

Bosch. Produces drills with three mountings - SDS max, SDS quick and SDS plus. The advantage of the drills of this company is the strength and the large slope of the longitudinal fastening grooves. Due to the special arrangement of the cutting edges (angle of inclination) and the centered point of the drill, they provide fast and high-quality drilling of holes in concrete.

Diager Twister. The drills are suitable for rotary hammer drills with SDS plus fixing chucks. They have a strong victorious soldering and a special guide insert. Not only concrete, but also granite is drilled well.

Concrete drill categories

The categories of elements for providing holes in solid structures depend on the characteristics of the structure:

• Sharpened during the drilling process. Made for making recesses with a large diametrical section. It is achieved due to the ability to spontaneously remove waste material, while the cutting part is not blunt, but rather sharpened against the surface.
• Spiral. Cope with a concrete surface with a fairly high strength.
• Gentle arrangement of the spiral part. Their purpose is concrete structures with low strength. The drilling process requires a lot of effort.

Diamond-coated tools deserve special attention. With their help, concrete surfaces reinforced with reinforcement are processed. With their help, work is done much faster and better.

Varieties of products differ in their purpose. Their parameters are noted in the regulatory documents. These include:

• crowns;
• shock cutting;
• screw;
• gentle.

There is an opinion that the products are used only for working with concrete. But in some cases you have to work with wooden products. In such cases, wood borax is used. Its use brings a number of benefits, the essence of which is as follows:

unimpeded chip removal;

minimum efforts are made to achieve the goal;

a special cutter eliminates the destruction of wood.

Main types

There are many types of drills from Pobedit. They differ in manufacturer and quality, price. Depending on the shape of the shank, there are:

• hex: regular or with a recess for quick installation;
• cylindrical - chambered for a standard drill;
• SDS - can be fixed in most rock drills;
• triangular - especially securely held and do not rotate.

The diameters are also different. Values ​​start at 3 mm. Victory drills are:

• for working with stone, brick, concrete;
• for gas and foam concrete;
• for ceramics, glass, tiles.

Drills for the toughest surfaces

Victory drills for stone, brick, concrete are the most popular. Most of them can be used in shock mode. The sharpening angle is usually 130 °. Some firms make the tip more complex:

• the value of the angle is greater;
• the tip is centering.

When hammer drill is selected, the tool crushes the surface like a chisel. The removed material is removed thanks to special grooves on the steel drill body. The usual number of these devices is from 2 to 4. They have other purposes as well. The grooves prevent the drill from getting stuck during rotation.

Some manufacturers, on the contrary, prohibit the use of their products in shock mode. It depends on the characteristics of the alloy and the sharpening angle.

Typically, victorious items in this category are considered disposable. At least, this is how sellers do it. However, craftsmen often sharpen them on their own and reuse them. It takes an electric sharpener and a little practice.

Sometimes you need to get a big hole. If the diameter is from 65 to 120 mm, special crowns are used. Their design also includes a similar drill.

Aerated concrete drills

Today, building products made of porous concrete are very popular:

• foam concrete;
• aerated concrete;
• silicate.

If a small hole is required, a conventional metal drill may work. Its disadvantage is that it is short-lived. Better to choose the standard win. In this case, you don't have to worry about the plaster.

If a hole of 30-120 mm is required, special soldered winder drills are used for the following materials:

• outwardly similar to feather drills for wood;
• shank - up to 450 mm, piercing through the standard block;
• the strength of the alloy is lower than for the stone;
• there is a spiral of 1-1.5 turns to eject waste;
• any drill or perforator will do, the only condition is the use of the bumpless mode.

Can be used for surfaces with external or internal finishing. The main thing is that the plaster is - without a reinforcing metal mesh.

Drills for tiles, ceramics, glass

On sale you can find products designed for other types of material:

• glass;
• tiles;
• ceramics.

They are distinguished by the following features:

• the tip of the pobedit in such cases is made in the form of a cone;
• shank - round, sometimes - in the form of a hexagon;
• used in bumpless mode;
• diameter: 3-12 mm.

Sometimes the design of this type of drill is reinforced:

• two pobeditovy plates;
• cutting edges - four;

This allows for smoother edges and increased accuracy. It is usually recommended to use a rotational speed of about 400-800 rpm during operation. Most often, products with a diameter of 10 mm are in demand.

There are more nuances when working:

1. If you need a hole of 20−94 mm, use "ballerinas" - circular drills. With their help, you can change the diameter of the hole. Consist of two victory plates. Sometimes a splinter mesh is included.
2. If small holes are required, this type of drill is also suitable for concrete. Moreover, there may be plaster on it.

Many manufacturers advise using water cooling during operation. This will help:

• extend the service life;
• increase efficiency.

Concrete drill for rotary hammer - we solve difficult tasks

Difficult tasks that the rotary hammer performs could not remain without design improvements. So, there are several types of keyless chucks, designed for different shapes of the nozzle shank and, accordingly, different loads. The most popular are two types: Plus and Max. At the same time, a single SDS standard is used for all - the ability to fix the nozzle with one hand movement. But pure SDS is rare, as is the intermediate SDS-top. In any case, the instructions for the perforator will help you to determine the type of nozzles you need - it clearly indicates which one is suitable for a specific model.

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This factor, by the way, plays a huge role in choosing the perforator itself, because having bought a tool with a rare type of consumables, you will be "tied" to a specialized store selling such equipment, which cannot be convenient in any way. A set of drills for a perforator for each class of perforators is different. Recall that all models are usually divided into light, medium and heavy. The latter are real jackhammers, and the attachments for them are appropriate. The plus shank is available for light to medium rock drills, while the max shank is found in the heavy class.

Manufacturers, striving to please consumers, produce various adapters that allow you to easily install drills of one class in a chuck of another, but this is not recommended, since each model of rock drill is designed for bits of a certain weight and size. If heavy perforators do not suffer from smaller consumables, then light and medium-sized drills will fail much faster, and repairing a perforator will cost much more.

Drill

A drill is a tool for creating holes or indentations in various materials. Most often used in drills with rotary or percussion-rotary functions and are not suitable for hammer drills.

Drills are classified according to the material to be processed.

A drill for metal is made of high-strength high-speed steel with or without subsequent processing. Protective coating increases cutting speed and drill life.

In addition to the coating, the drill is also distinguished by the type of shank (Fig. 1), which can be tapered (1) or cylindrical (2). Conical (Morse taper) are used in metalworking production.

Drills for metal, as the most durable, are used as universal drills for drilling various materials.

Drills with a sharpening angle of 80–90 ° are suitable for soft metals (fig. 2). Cast iron and steel require drills with a sharpening angle of at least 116 °. For working with hardened steel and similar hard metals, professional drills, sharpened at an angle of 130–140 °, are required.

Wood drills have a different design. To increase efficiency when working with soft fibrous material, they are equipped with a self-centering head.

Small holes are drilled with twist drills (1), and twisted single-spiral drills with a sharp edge (2) are used to make deep holes. The shanks of such drills are usually cylindrical.

To drill deep and wide holes in wood (10–60 cm in diameter), use a core drill of the appropriate diameter (Fig. 4).

For drilling bricks, ceramics, concrete, drills with a carbide insert and a cylindrical shank are used.

Drilling is performed with a drill in shock-rotational mode (Fig. 5).

A drill is a tool for drilling holes, it is used in hammer drills and is not intended to work with a drill. A drill, unlike a drill, can have a head with several cutting edges of different shapes. According to the sharpening configuration (Fig. 1), the drills are classic (the plate has criss-cross smooth cutting flat front and rear edges) and centering (the plate has a geometry that excludes the drill drift inside the hole from the axis of the initial position).

The cutting edges of the drill can be not only linear, but also, for example, wavy with a centering spike and extreme cutting protrusions: this option removes hard material in layers, which is a way to reduce the load on the hammer drill. There are also self-sharpening bits with the correct sharpening angle, which are necessary in aggressive drilling conditions (for example, abrasive rocks). The spiral groove of the drill serves to remove drilling waste and differs in the shape of the spiral: its productivity is higher, the steeper the winding. The hammer drill is used for working with hard materials: concrete and brick walls.

The shank of the drill is also different: it has a cylindrical shape, but with protrusions or recesses that ensure the grip of the drill and its reliable retention in the chuck. This design is due to the greater impact power of the perforator, which also requires greater strength of the drill itself.

The most widely used drills are SDS-plus for light rock drills and SDS-max for more powerful ones (Fig. 2).

The type of drill chuck is similar in name and structure with one or another type of drill shank. Chucks differ in size, shank diameter, number and size of recesses for fixing and transferring rotation, and, consequently, permissible loads and impact force. Various types of SDS system chucks are used in rock drills, depending on the conditions of the work being carried out and the loads or the power of the tools themselves. Chucks correspond to their own drills, different in the shape of the shanks.