How to sharpen a hammer drill correctly

How to sharpen a drill bit for concrete? — Metals, equipment, instructions

To make holes during construction work, it is recommended to use a drill and pobedit drills. They are characterized by precision in operation and long service life. When the drill wears out, you can sharpen it yourself

Basic rules for sharpening

Before sharpening a concrete drill at home, you need to familiarize yourself with the basic rules for this procedure:

• Sharpening a drill for concrete should be carried out in compliance with the optimal body temperature. It is strictly forbidden to overheat it, as this will lead to damage to the product. This rule must be followed if the drill is made from a titanium-based hard alloy.
• If the drill accidentally overheats, it is strictly forbidden to lower it into water. It should cool down naturally.
• The work needs to be done gradually. Initially, a small part of the drill is sharpened. After the sharpened section has cooled, we proceed to the next one.
• During the work process, it is recommended to focus on equality of angles.
• The cutting edges of the drill must be of the same length, since under high loads the tool will be pushed to the side, which causes breakage.

Sharpening of drills used in a drill or hammer drill must be carried out in strict accordance with the rules, which will ensure their excellent performance.

Methods

When drilling into hard materials, only the edges should come into contact with them. That is why the back surface is sharpened at a certain angle. As a result of this operation, a gap appears between the edge and the bottom of the hole.

Using a conical sharpener

The drill is inserted into a special prism of the sharpening machine, which moves around its axis. The prism is positioned at a certain angle in relation to the grinding wheel. The back of the drill is shaped like a cone. It is located in the place where the working surface of the grinding wheel intersects with the swing axis.

In order to properly sharpen the drill, you need to first configure the parameters. The axis of the sharpening cone should be located at an angle of 45 degrees relative to the axis of the drill itself. Cone sharpening can be performed using two methods:

1. The top of the cone that will be sharpened should be located below the top of the sharpening cone. It is first recommended to carry out the adjustment in accordance with the specified parameters: a - 45 degrees, b - from 13 to 15 degrees, n - 1.9d. the drill axis and the cone must intersect at an angle that is less than the angle of the grinding wheel and drill. If we sharpen using this method, we need to make sure that the tip of the drill is located above the top of the sharpening cone. The tip and the drill should be 1.06 in apart. The axis of the drill and the axis of the cone should intersect at an angle of 90 degrees.
2. In order to ensure the rear angle for the peripheral point, it is necessary to provide indicators - a-5-7 degrees, angle 2f - from 116 to 118 degrees. the cutting transverse edge should be at an angle of 55 degrees.

Using screw sharpening

If there is a need to automate the process of sharpening drills, then the use of the screw method is recommended. It lies in the fact that translational movements are coordinated with the rotations of the grinding wheel. With its help, you can simultaneously sharpen the front and rear corners.

When screw sharpening, the rear angles of the working part increase as they approach the center. When using this method, there is a decrease in the strength of the transverse edge of the drills, which leads to their breakage when drilling excessively hard materials.

Two-plane sharpening

Using this method, it is recommended to sharpen drills that are intended for drilling non-hard materials. If the diameter of the drill is less than 3 mm, then the use of this sharpening method is recommended. Using this method, drills are sharpened at an angle of 60 degrees. Thanks to this method, products are improved rather than errors are corrected.

Features of pobedit drills

To produce products, high-strength metals are used - tungsten, cobalt, which are mixed with carbon. With the help of such tools, drilling is carried out in brick, stone and other materials of a high level of hardness. The Pobedit plate is fastened to the steel tail using copper soldering. The diameter of the drill is measured in cylindrical sections.

The drill has a conical surface and is characterized by abrasion resistance. The product is resistant to high temperatures. But, it is characterized by fragility, so sharpening work must be done carefully. In pobedit drills, only the trailing edge is most often sharpened.

How to sharpen a pobedite drill bit?

When sharpening, you need to pay attention to symmetry, since in its absence the tool will wear out. Pobedite drills require sharpening only the back edge at an angle of 60 degrees. During work, you need to ensure the uniformity of the plane. It can be identified by its reflection. Several reflections indicate that the drill is sharpened in several planes. In this case, repeated sharpening is carried out until one plane comes out.

If the leading edge of the Pobedit drill is covered with solder, then you need to sharpen it too. The work consists of removing excess metal along the axis of the tool and opening the vibrator. It is not recommended to overdo it in this case, as this can lead to loosening of the fastening of the plate to the steel axle. When sharpening, you need to ensure that there is a bridge between the front and rear edges.

Sharpening at home

When sharpening drills with your own hands, the user is advised to adhere to safety rules. When working on sanding wheels, safety glasses must be worn. This will protect your eyes from abrasives and pieces of scale. Glasses must be used even if there is a protective screen on the sandpaper.

It is strictly forbidden to carry out work wearing gloves. The drill may get caught in the thread, causing hand injury. It is recommended to carry out work in tight-fitting clothing, the buttons of which are pre-fastened. It is recommended to adjust the support so that the gap between it and the stone is small.

Sharpening drills can be carried out in various ways, which allows a person to choose the most suitable option for himself. To avoid injury, you must adhere to safety precautions during work.

Source: https://spb-metalloobrabotka.com/kak-pravilno-zatochit-sverlo-po-betonu/

How to properly sharpen an sds plus and sds max drill for concrete for a rotary hammer

A concrete drill is a specially designed drill whose cutting part is made of alloys based on tungsten and titanium. A drill of this design is designed to drill brick, concrete, stone and marble. A properly sharpened sds drill is the key to quick drilling and savings. The drill has two functions simultaneously:

1. It acts as a twist drill.
2. Breaks material like a chisel.

Most often, concrete drills are a rod with a soldered tip made of carbide material.

Unlike a drill for concrete and stone, the sds plus drill is used when working with a hammer drill. The tool is affected not only by the force in the plane of rotation, but also by the impact force. The drill operates under very harsh conditions.

During operation, any cutting tool becomes dull, including drills and drills. Tools heat up and drilling time increases.

In a hammer drill, the drill also experiences shock load and the question arises of how to sharpen the drill for concrete.

A few tips during the drilling process to extend the life of the concrete drill:

1. Constantly monitor the heating of the tool, preventing it from overheating.
2. Do not cool a heated drill or drill by sudden immersion in water.
3. When drilling ceramic tiles, do not use the hammer drill mode.

Tips for sharpening a drill bit at home

Before you learn how to sharpen a drill or drill for concrete, you need to clarify the main design features of the tool.

The working edge of the drill is formed by the convergence of the front and rear edges. The angle between the front edge and the axis of the drill is 30°. The angle between the rear edge and the axis of the drill has a value of 60°.

The working edges of the drill should form an angle of 120°.

This is what a sharpened drill looks like

There is an opinion that the sds+ drill for concrete does not require sharpening and is replaced with a new one after complete wear. This version is especially warmly supported by workers in construction tool stores.

But by learning how to sharpen a drill or auger correctly, you will see that the life of the drill can be significantly extended.

Sharpening a drill involves setting the cutting edge of the drill to the desired shape. Both the front and back edges of the drill are sharpened.

When inserting a drill into a material, only the cutting edges of the tool should work, and the back of the drill should not touch the surface being processed.

At any time during the drilling process, the back surface of the drill must have a gap with the surface being machined.

Otherwise, the tool not only drills poorly, but also quickly heats up, becomes dull, and collapses.

Important tips on how to sharpen a metal drill correctly.

Methods for sharpening drills for concrete

How to sharpen a drill bit for a hammer drill and with what?
Pobedit is a very strong alloy and cannot be sharpened with regular sandpaper and a stone. Correctly sharpening a drill or auger for concrete can only be done with diamond or abrasive wheels made of silicon carbide or CBN. We highly recommend buying a diamond wheel for sharpening the tool; it will last a long time and the tool will be sharp.

Work order

The wheel must be installed on the sharpening machine. Sharpening on a sharpening machine is carried out in strict compliance with safety precautions. The thrust bearing is installed with minimal clearance, work is performed without gloves, and the eyes are protected by a special shield or glasses.

Before sharpening, it is necessary to correct the peripheral surface of the wheel using a CBN insert, that is, to level the sharpening surface of the stone.

Before moving on to the answer to the question of how to sharpen a drill bit for concrete at home, let’s take a closer look at the sharpening process.

Drill bit with insert for working on concrete

We will carry out standard sharpening of drill bits for concrete.

Having secured the device, place the drill on it and bring it to the surface of the sharpening stone so that the cutting edge is parallel to the plane of the sharpening stone.

We sharpen both edges, checking their symmetry for clearance and the angle between them at 120°.

Let's move on to sharpening the leading edges

The drill rests on a fixture that provides an angle of 30°. The drill is brought to the stone plane to be sharpened at an angle of 30° and the front edge is sharpened.

Turning the drill 180°, we also sharpen the second front edge.

Now the drill must be brought to the surface of the stone to be sharpened at an angle of 60°. This is achieved by placing the drill on another part of the fixture.

Sharpening the rear edges is done in a similar way.
If after sharpening you end up with cutting edges of different sizes, sharpening should be repeated in full.

To fully understand the sharpening process on a sharpening machine, watch the instructional video.

Everything is clear with the sharpening machine. Or you can use a used diamond blade for an angle grinder.

But in order to sharpen a drill on a grinder, the latter must be carefully secured.

To ensure high-quality sharpening of the drill, it is necessary to equip the machine with a thrust bearing, on which the drill should rest when sharpening. A piece of corner, firmly attached to a grinder or table, can serve as a thrust bearing.

If the diamond disc is not placed on the grinder, then it can be easily secured by performing the simple manipulations shown in the video about sharpening the drill.
When sharpening, it is necessary to give the back surface of the drill the required shape.

The cutting edges of the drill are sharpened and the back surface is removed. Any point on the back surface of the drill should not touch the material being processed.

Source: https://sdelalremont.ru/eshhe-raz-o-pravilnoj-zatochke-bura-po-betonu.html

How to sharpen a drill bit for concrete

Drills designed to perform work on such complex materials as concrete are made using carbide plates, which are soldered onto their cutting part.

Like any other, such a tool wears out during use, which is when the question arises of how to sharpen a drill for concrete.

To restore the geometric parameters of the working part of a concrete drill without damaging the tool itself, you can try several methods of sharpening it, each of which is relevant under certain circumstances.

A pobedite drill with blunt edges takes a long time to drill but overheats quickly

Sharpening rules

Sharpening a drill for concrete can be carried out on a corundum grinding wheel installed on appropriate equipment. Such drills are sharpened in the same way as regular ones, but there are a number of nuances that should be taken into account.

Carbide inserts, which are equipped with the cutting part of concrete drills, are very critical of severe overheating. The latter can cause the plate to crack or even separate from the main body of the tool at the point where it is soldered.

That is why, in the process of sharpening drills for concrete, they should be cooled with water as often as possible, without bringing the cutting part to overheating.

It should be taken into account that a very hot tip of a concrete drill, if it has reached this state, should under no circumstances be immersed in water: it must cool slowly under natural conditions. Sudden cooling of carbide inserts can cause them to simply burst.

The cutting edges of the drill should be sharp without roundness

The concrete drill should be sharpened in such a way that its worn cutting edges become straight, and the place where they intersect exactly coincides with the axis of rotation of the tool. In addition, it is necessary to ensure that the machined cutting edges of the carbide insert are of the same length. In this case, the load perceived by each of these edges will have the same value, and accordingly, they will wear out evenly.

A difference in the length of the cutting edges of a concrete drill can also cause the tool to be pushed to the side during the drilling process under the influence of the higher load created on the longer cutting part, which will ultimately lead to its breakage.

The sharpening angle of the cutting edges is another important parameter that you should pay attention to. If the uniformity of this parameter for two edges is not maintained, then the edge with a larger sharpening angle will work and, accordingly, be actively loaded. This will also lead to rapid tool failure.

Knowing the basic principles of proper sharpening of drills for concrete, you can sharpen the tool quite well even in the most “field” conditions. The main thing is to exercise extreme caution so as not to get injured!

How to sharpen a drill

During the drilling process, the tool used to perform such an operation must contact the material being processed only with its cutting edges. That is why the back surface of any drill must be sharpened at a certain angle, which ensures the presence of a gap between it and the bottom of the hole being formed (cutting surface).

Today, three main methods of sharpening drills for concrete are used, which make it possible to give the back surface of the tool a certain shape. Let's consider these methods in more detail.

Conical sharpening

The most common way to restore the geometric parameters of drills used for concrete work is conical sharpening.

The tool to be sharpened is installed in a special prism, which has the ability to move (swing) around its axis, located at a certain angle to the working surface of the grinding wheel.

The rear surface of the cutting part of the concrete drill takes the shape of a cone with the apex located at the intersection of the working surface of the grinding wheel with the axis of the prism's swing.

A sharpening device, even a relatively simple homemade one, allows you to evenly sharpen the cutting edges of the drill

To sharpen a drill using this method, you must configure the parameters indicated in the table.

• the distance between the axis of the sharpening cone (the axis of the tool’s swing) and the axis of the drill itself (h);
• distance from the top of the sharpening cone (H) to the axis of the drill;
• the angle at which the drill axis (o) and the sharpening cone axis intersect;
• half the value of the angle located between the sides of the sharpening cone (b).

Scheme of conical sharpening of a drill

For conical sharpening of a concrete drill, you can use two methods:

1. The top of the tool to be sharpened is located lower than the top of the sharpening cone. When sharpening a drill for concrete in this way, use the following settings: a – 45°, b – 13–15°, H – 1.9 D, h – (0.05–0.08) D. In this case, the “o” angle located between the axis of the drill and the guide of the cone, is less than the angle between the axes of the tool and the circle forming the shape of the grinding wheel (φ0).
2. The top of the drill being sharpened is located higher than the top of the sharpening cone. For this sharpening, the following parameters are used: the distance of the top of the cone from the top of the drill (H) – 1.16 D; half the angle at the apex of the sharpening cone (b) – 30–35°; the angle at which the drill and cone axes are located (o) – 90°; displacement (h) – (0.05–0.08) D; angle φ0 > 0.

A tool for working on concrete sharpened using these methods has the parameters indicated in the table.

Table from text

Drill sharpening angles

The value of the rear angle of the cutting part is changed by adjusting the value h - the distance between the intersecting axes of the sharpening cone and drill.

To change the angle of inclination of the transverse cutting edge (φ), it is necessary to rotate the drill being sharpened around its axis, and to change the angle in the plan, the angles “o” and “b” must be changed.

If you increase the distance between the axis of the sharpening cone (h) and the axis of the drill, then the angle “a” will increase, and the angles “φ” and “2φ” will decrease. An increase in the parameters “o”, “b” and “H” leads to a decrease in the values ​​of φ, 2φ, as well as the angle “a”.

Geometric parameters of the cutting part of drills with pobedit plates

The conical sharpening method is preferable, since it creates a sharper increase in the back angle of the drill. When drilling concrete, the tool performs a rotational movement and at the same time moves along its axis, so the trajectory of movement of each point of the cutting part is a helical line.

The value of the angle “m” at which such a helix is ​​located to the cutting plane without taking into account the axial movement of the tool is determined by the following formula: tg m = S0/nD, where S0 is the drill feed, measured in mm/rev. From this formula it becomes clear: the closer the point on the surface of the cutting part is located to the axis of the drill, the smaller the clearance angle in the plane under consideration will be.

This property of conical sharpening, which assumes that the clearance angle in areas of the working surface of the drill approaching its axis increases, helps to increase its durability.

Screw sharpening

If the task is to automate the process of sharpening drills for concrete, then it is best to use the screw method, which assumes that, in addition to rotation, they are also provided with two translational movements coordinated with the rotation of the grinding wheel.

One of these movements, called oscillating, is directed along the generatrix of the grinding wheel, parallel to the cutting edge of the tool; during its execution, back angles are not created.

The backing movement, during which the rear corners of the working part are formed, occurs along the axis of the drill.

Screw sharpening drill

When performing screw sharpening, two areas of the working part of the drill must be treated especially carefully:

• 0-1, located on the diameter of the tool core and processed by the edge part of the grinding wheel;
• 1-2, processed by the generatrix of a circle.

Screw sharpening, like conical sharpening, is characterized by an increase in the rear angles of the working part as it approaches the center of the drill. This feature of this method allows, by setting even small values ​​of the clearance angles for the peripheral region of the cutting part, to obtain the clearance angles of the required value in its central zone.

The transverse cutting edge of drills subjected to screw sharpening is characterized by low strength. This leads to the fact that when drilling hard materials (including concrete), they are subject to active wear. Meanwhile, when processing materials that are not too hard, such drills perform very well.

How to properly sharpen an sds plus and sds max drill bit for concrete for a rotary hammer. Sharpening a drill bit for a hammer drill

A concrete drill is a specially designed drill whose cutting part is made of alloys based on tungsten and titanium. A drill of this design is designed to drill brick, concrete, stone and marble. A properly sharpened sds drill is the key to quick drilling and savings. The drill has two functions at the same time: it acts as a twist drill, breaking the material like a chisel.

:

Most often, concrete drills are a rod with a soldered tip made of carbide material.

Unlike a drill for concrete and stone, the sds plus drill is used when working with a hammer drill. The tool is affected not only by the force in the plane of rotation, but also by the impact force. The drill operates under very harsh conditions.

During operation, any cutting tool becomes dull, including drills and drills. The tools heat up, drilling time increases. In a hammer drill, the drill also experiences shock load and the question arises of how to sharpen the drill for concrete.

A few tips during the drilling process to extend the life of the concrete drill:

1. Constantly monitor the heating of the tool, preventing it from overheating.

2.When drilling ceramic tiles, do not use the hammer drill mode.

3. Do not cool a heated drill or drill by sudden immersion in water.

How to sharpen a concrete drill at home

» Screwdriver » How to sharpen a drill bit for concrete at home

A concrete drill is a specially designed drill whose cutting part is made of alloys based on tungsten and titanium. A drill of this design is designed to drill brick, concrete, stone and marble. A properly sharpened sds drill is the key to quick drilling and savings. The drill has two functions simultaneously:

1. It acts as a twist drill.
2. Breaks material like a chisel.

Most often, concrete drills are a rod with a soldered tip made of carbide material.

Unlike a drill for concrete and stone, the sds plus drill is used when working with a hammer drill. The tool is affected not only by the force in the plane of rotation, but also by the impact force. The drill operates under very harsh conditions.

During operation, any cutting tool becomes dull, including drills and drills. Tools heat up and drilling time increases.

In a hammer drill, the drill also experiences shock load and the question arises of how to sharpen the drill for concrete.

A few tips during the drilling process to extend the life of the concrete drill:

1. Constantly monitor the heating of the tool, preventing it from overheating.
2. Do not cool a heated drill or drill by sudden immersion in water.
3. When drilling ceramic tiles, do not use the hammer drill mode.

DIY hole drill from a hammer drill

Without a doubt, every person who lives in a private house or spends his free time in the country has such a power tool as a hammer drill. Unlike an ordinary electric drill, it has a hammer drilling function.

Thanks to the use of this power tool, you can make holes of different diameters in a hard and durable surface without much effort and in a short period of time. In some cases, to drill holes in the ground under fence posts or piles, a power tool such as a hammer drill is used as a hole drill.

Materials and tools for manufacturing

Sometimes people who live in a private house or are owners of summer houses need to carry out a variety of earthworks. Often there is a need to dig holes, which are necessary for the further arrangement of fence posts or so-called pile supports. To perform drilling and carry out similar work, hand tools (drill) are mainly used.

It is worth noting that using hand tools takes a lot of time and requires huge labor costs. In some cases, when there is a need to carry out a large amount of work, digging holes, special equipment is used, which is equipped with an electric or fuel type drive.

The use of special equipment during various excavation works, such as digging holes for pile supports, significantly reduces the amount of labor costs. However, purchasing or renting such equipment is not cheap. It is for this reason that a large number of people use homemade hole drills to perform such excavation work, which can be made independently from the most ordinary hammer drill.

As a rule, such homemade drills are used for drilling shallow holes of small diameter. The design of a homemade pit drill consists of the following parts:

1. Adapter (a reducer can be used as an alternative).
2. An ordinary earthen auger.
3. Rotary hammer (it is recommended to use a power tool with a good power reserve).

You can make an earth auger and adapter yourself. However, it should be noted that in construction stores you can purchase a ready-made auger (special attachment), which is designed directly for drilling holes on the ground surface. To make a hole drill yourself you will need to use:

• welding machine;
• angle grinder (grinder);
• hammer drill;
• electric drills;
• metal rod or fittings (used to make a rod);
• material for making the cutting part;
• cable and socket (used to make an extension cord).

For a homemade hole drill, it is recommended to use a power tool with a power of 2 kW or more. It is worth noting that such a device is not recommended for drilling holes in very hard soil. Using a homemade hole drill, drilling can be carried out continuously or with periodic removal of excess soil from the hole.

How to make a hole drill from a hammer drill

The work associated with converting a hammer drill into a device used for making holes in the ground involves only the creation of a special attachment. To create such a nozzle, you must perform the work in the following sequence:

1. A grinder is used to cut a piece of tube or ordinary metal rod of the required length (if the power of the hammer drill is 2 kW, you need to cut off 1 m of rod).
2. Cutting knives need to be welded to the bottom of the tube. To make knives, you can use a dull circular saw blade. To do this, it needs to be cut in half and welded to the tube at a slight angle (25-30 degrees).
3. You need to cut off the base from the hammer drill and weld it to a tube with cutting knives. Thanks to this, the structure can be connected directly to the power tool itself.

After making the nozzle, it must be inserted into the chuck of the power tool. When drilling holes in the ground surface, it is recommended to use minimum speed. It should also be noted that to perform such tasks, it is preferable to use a power tool whose power varies from 2 kW.

Making a hole drill yourself will not take much time and will not require a lot of effort. Thanks to its use, the process of performing excavation work associated with digging small-diameter holes in the ground is significantly simplified and accelerated.

Source: https://tehnopanorama.ru/instrumenty/yamobur-iz-perforatora-svoimi-rukami.html

Concrete drill bits for rotary hammer

When performing construction and repair work, it often becomes necessary to make a hole in a concrete, stone or brick wall. An impact hammer with a special cutting tool - a concrete drill - will help with this.

Since concrete is a fairly strong and dense material, you need to drill a hole in it with a special drill, making not only rotational, but also impact movements. To withstand such heavy loads, the concrete drill is made from high-quality material using an industrial method.

The quality of the drill used affects the life of the hammer drill

What is a hammer drill

Hammers, unlike a drill, do not drill the surface, but pierce it. Therefore, concrete drills for hammer drills differ not only in material, but also in shape. Each cutting element has a specific cutting edge design and a different number of outlet grooves.

What does a drill consist of?

Drills for hammer drills for concrete have several important parameters:

• landing shank;
• spiral rod;
• cutting part.

The shank is the part of the drill that secures it into the clamping hole of the hammer drill.

They differ in the number of edges, the size of the recesses and are divided into five main types:

• 3-sided;
• 4-sided;
• 6-sided;
• cylindrical;
• SDS.

Main types of drill shanks for rotary hammers

Depending on the type of impact machine cartridge, select the appropriate type of shank. The clamping mechanism transmits torque to the drill under heavy loads, so the parts must be securely and tightly secured. Pay attention to the type and size of your hammer drill chuck and buy drills only with a suitable shank.

The spiral shank is the main part of the drill that has one or more spiral flutes. Waste chips and sludge are discharged through them; they can have varying degrees of curl.

Every manufacturer wants to create a drill that creates holes as quickly as possible, while remaining wear-resistant and durable. The more twisted the design of the drill, the faster it will punch a hole, but the less strong and durable the cutting element will be.

Therefore, manufacturers are experimenting with the composition of the material and the shape of the drill bit, balancing between durability and productivity of their products.

The cutting part also differs in the shape and number of cutting plates. This part of the drill begins the drilling process and should be the first to cut into the concrete or stone surface. It is this that punches the hole, not the spiral rod. A drill is a cross between a drill and a chisel. Some options can be sharpened at an angle and have different groove radii.

Drills and drills: what is their difference

A drill and a drill are cutting tools. They help make cylindrical recesses or through holes. They differ only in the surface they work with. If we are talking about dense, non-shock-absorbing surfaces such as stone, concrete or brick, then, as a rule, this is a drill. Drills are available for wood, plastic, and metal. Metal, although a fairly dense and durable material, is springy. Therefore, they work with it using metal drills.

Crowns, drills and drill bits for concrete

This is not to say that drills are not drills. Drills are much stronger than drills, and they are used in impact or non-impact hammer drills. Drill bits are used in drills. Drills can have a head with different edges and several cutting inserts. Some drills have special geometry that helps keep the element in the center of the recess.

Drills and augers available on the market today can be classified as follows::

• metal drill (made from a special alloy that has high strength and can quickly cut metal surfaces);
• wood drill (distinguished by the presence of a self-centering head; for wide holes, drills have a feather shape);
• drill for brick and concrete (elements have a reinforced insert, designed for impact modes);
• earth drill for a hammer drill (an element for drilling holes and holes in the ground).

How to choose the right drill bit for a hammer drill

A correctly selected drill will not only make your work easier, but will also extend the life of the hammer drill. After all, the faster and better the drill drills holes, the less stress the impact equipment will experience.

The first thing you need to pay attention to when purchasing hammer drill elements is what material the drills are intended for. You cannot drill into concrete using an element for wooden surfaces, just as it is not recommended to use a drill for concrete on soft and pliable walls. You can choose hammer drills for metal, concrete, stone, wood, plasterboard, and ceramics.

How to choose the right ceramic drill

The next important parameter is the type of shank. As noted above, it must match the size of the cartridge. Today, the most popular standards are drills of the SDS plus type (diameter 10 mm) and SDS max (diameter 18 mm). The second type of shank is used in professional and more powerful models of rotary hammers.

Depending on the depth of the holes, drills are divided into:

• screw;
• spiral;
• flat.

An auger drill for a hammer drill is capable of creating deep holes. It has a self-sharpening pobedit tip. These drills are designed to work with heavy and very dense surfaces.

Spiral drills can also create deep holes, but with a small diameter. They are indispensable for fastening and installation/dismantling work (for example, they are used to install air conditioners and heating radiators).

Flat drills are quite hardy and are designed for shallow holes. They have a less twisted spiral, so the sludge is discharged slowly. You will appreciate the flat angle drill bits for demanding work.

Categories of drill bits

When working with concrete surfaces, you have to make holes of different lengths, depths, widths and shapes. Therefore, the cutting elements also have their own variety. In addition to drills and drills, you can use crowns.

Concrete drills SDS +

They are a glass with pobeditov or diamond teeth and a centering drill. Such elements allow you to create a wide and regular-shaped hole. The diameter of the crown can be in the range of 35–120 mm. They do an excellent job of cutting out recesses for sockets or creating air duct openings. Like drills, crowns can be impact or unimpacted.

Another interesting assistant in creating recesses is chisels. They do a good job of removing tiles, creating grooves for wiring, and widening window or door openings. To work with them, the hammer drill should be set to impact mode without rotation. Chisels can be in the form of a pike, a crowbar, or have a chisel-shaped or grooved end.

Subtleties of working with a drill

It would be useful to once again recall the main points that must be observed when working with a drill:

1. Drills should be used for their intended purpose. If the drill is intended for a metal hammer drill, then we use it specifically in the hammer drill and specifically for working with metal surfaces. Conscientious manufacturers always indicate the purpose on the packaging: for granite, reinforced concrete, brick, etc. They have different inserts, tips and profiles. Don't neglect this information.
2. Do not use a cutting element if the shank is not your type. You can not only damage the equipment, but also damage the drill. Not to mention that the fixation of the two parts will be unreliable. If you still need to use an SDS-plus drill on a professional hammer drill, use a special adapter. But not the other way around: it is absolutely forbidden to use SDS-max drills on household models. They have different power requirements.

   Breach drill Bosch SDS Max 65x450 mm

3. Check the serviceability of the impact equipment chuck. If you notice any play or mechanical wear, replace the chuck immediately.
4. Don’t forget about lubricant: it should be applied to the drill shank before starting work to reduce heating of the part.
5. The hammer drill operates under high load conditions, so take regular breaks. It is better to remove the drill from the hole every 10 seconds. It will not heat up as much and will last longer.
6. Keep your work straight. If you are tired, don't work too hard. Give yourself a break and a break. After all, if the hammer drill is moved even slightly to the side from the working hole, the drill can instantly break.
7. Try not to allow the drill to come into contact with reinforcement or metal mesh. This can create cracks and burrs on the drill, which will damage the cutting tool at the most inopportune moment.

After using the hammer drill, clean it with a dry brush to remove dust and working husks. Under no circumstances should the tool be washed so as not to provoke corrosion of electrical equipment. If the drill becomes bent or dull during operation, it cannot be restored. The drill will have to be replaced with a new one.

By following these recommendations for the operation of hammer drills, you will extend the service life of the equipment and create the safest conditions for repair work.

Source: https://pobetony.expert/tekhnika-i-materialy/bur-po-betonu