How to cut a round hole in metal

How to make a round hole with a grinder

There is hardly a better way for a home craftsman than this to make a round hole in a metal or other part. The grinder will help you make an even cut and the hole will turn out almost perfect, even in a thick steel workpiece.

  Another option is to use circular drilling, but this is a fairly routine operation and is suitable if you do not have an angle grinder at home. A cutting torch or welding machine will not provide a smooth, neat edge and are best left for when rough work is needed.

There are a couple of tricks to make the cut even. More on this below step by step.

Inventors shop at a budget Chinese online store.

Tools:

• grinder 125 mm;
• new cutting disc 125 mm;
• old almost worn out cutting disc;
• hammer;
• chisel or breakdown;
• pliers.

Hole cutting

On the surface we draw a circle - the outline of the hole that we will subsequently cut through the angle grinder,

The trick is that we put not a new, but an old, worn-out cutting wheel on the grinder.

DIY electronics in a Chinese store.

It has a small diameter, so when cutting it touches the metal with a smaller area. With its help you need to cut a small recess along the contour of the hole. It is enough to go literally 1/3 of the thickness of the steel. Since the erased disk has a small diameter, the insertion will be smooth, without the formation of serifs outside the circle.

Having scratched the outline of the hole, a new cutting disc is installed on the grinder. They already cut out a square through window in the center of the circle. It should not reach the boundaries of the drawn circle by a few centimeters, maybe more.

Now you need to remove the remaining part of the metal between the outline of the round hole and the border of the square cut out in it. To do this, use a grinder to split the excess steel into sectors 1-1.5 cm wide. If the metal is thick, then when making cuts it is better to keep a small step.

Next, along the edge of each sector, blows are applied with a hammer through a chisel or punch.

The metal is bent and then returned to its original position with blows from the reverse side. It needs to be broken like a wire. It's not difficult at all. If the diameter of the hole allows, then the metal can be bent with pliers. It is necessary to break out all segments sequentially.

If the worn cutting wheel had a small diameter, and when broken, the metal dissolved into narrow segments, then the resulting hole will have the shape of an almost perfect circle. It doesn't even need to be sanded. A similar method can be used if necessary to make a hole in a tile. Only in this case will the segments be broken with pliers immediately, without bending back and forth.

Watch the video



Source: https://izobreteniya.net/kak-sdelat-krugloe-otverstie-bolgarkoj/

How to cut a circle in metal - Metalist's Handbook

How to cut a hole in metal at home

You can cut any holes accurately in metal

Unfortunately, for home workshops such high-precision equipment is a luxury if they have to use other methods, some of which are quite extraordinary.

Metal marking

The outline of the hole to be cut should be marked on the metal. Cutting a round hole in metal is not as difficult as drilling a hole in glass, but it is more troublesome.

Marking is carried out using a marker, a ruler, or a marking compass. For a hole consisting of straight lines, marking is carried out using a ruler and not a marker. A compass is used to mark a round hole.

To make the oil more visible, it is pointed with a marker.

Hole cutting

A rectangular hole in metal is much easier to cut with a grinder. For this purpose, a circle with a thickness of 0.8 to 1.4.5 millimeters is installed on the machine.

The carving is carried out along the intended straight lines until the sheet of metal is cut through.

You should use the grinder carefully in the corners, since it is easy to make a cut here than is simply necessary.

Round holes are cut in most cases with a gas cutter:

• It is necessary to light the burner;
• The torch should be well adjusted;
• The torch should be guided with slow movements along the intended contour.

The rare home craftsman has a gas cutter; in this case, a round or oval hole is cut using a welding machine. How to cut a circle from a hole in metal with a grinder .

How to cut a circle “pancake” came out good and I made a hole in it according to the template using a grinder. The device is set to the maximum possible current. How to cut a round hole in metal: instructions. The ignited arc is installed in any populated area of ​​the hole contour.

After a while, a hole will appear in the metal, then the electrode should be guided along the contour while burning the metal.

How to cut a circle with a grinder part 1

How to cut a straight hole in metal with a grinder . How to cut a circle from metal in 2018 how to cut. My method is suitable for metals approximately 1-5 mm larger.

The metal has different thicknesses and not all of them can be taken by any device. So, with a device with a power of no more than one hundred and fifty amperes, it will be possible to cut metal with a thickness of no more than four millimeters.

The cutting speed in this way greatly depends on the thickness of the electrode. The work is carried out most quickly with thin electrodes, but they have their drawback - rapid combustion, leading to frequent replacement of the electrode. When replacing the electrode, the metal has time to cool down and has to be heated first.

Round hole in metal with an angle grinder

You can try cutting a round hole with a grinder. How to cut a circle with a grinder, part 1, how to cut a straight hole in metal with a grinder.

Numerous short cuts are made along the perimeter of the entire intended contour until they merge into a single contour.

In this case, the hole is a polygon with a large number of sides, and the more sides there are, the more the polygon will resemble a circle . It is worth noting that this option is chosen only in the case of thin metal - a maximum of three millimeters.

The finished hole necessarily needs additional processing, which allows it to obtain a more regular shape. If the hole is large, it can be processed with a grinder with a thick disk.

To do this, place the circle inside the hole and make sure that it is in the same plane with the metal sheet. How to cut a circle with a grinder part 1. By turning on the grinder, you can sharpen the outline.

Unusual metal cutting option

If you don’t have a grinder, a gas cutter, or a welding machine, an electric drill will help you make a hole in the metal. This method should be used only as a last resort, since it is considered the most labor-intensive.

59 how to cut a round hole in metal with a grinder. How to cut a straight hole in metal with a grinder. At a distance of half the drill selected for work, another circle should be drawn inside the desired circle.

Drilling locations are marked in a circle of smaller diameter. The distance between such markings should be the diameter of the drill. In the marked places, through drilling is performed, and the remaining part is knocked out of the sheet of metal with a hammer.

With this option, inside the hole , which can be removed with a file or grinder .

Source: https://ssk2121.com/kak-vyrezat-krug-v-metalle/

How to properly cut metal with a grinder, cut round holes, saw pipes, cut corrugated sheets

There is an opinion that the very concept of “grinder” came into our everyday life because this instrument was first brought from Bulgaria. This is partly true. But they developed it and began producing it in Germany. It first came to us from Bulgaria, where it began to be produced in the seventies. Angle grinder is the correct name for the tool.

When working with an angle grinder, it is imperative to follow safety precautions, namely: wear goggles, gloves, a helmet and a protective apron.

The resulting sections can be ground, polished, and sharpened. A large selection of interchangeable attachments makes this tool indispensable and versatile.

At the same time, it is the most dangerous tool.

To cut metal with a grinder you will need:

• mask;
• glasses;
• disks;
• Bulgarian;
• metal.

How to choose the right grinder

The grinder should fit comfortably in your hand.

The correct choice and quality of the grinder itself determines the quality of work and the safety of the worker.

When choosing a machine, you should focus on its main parameters: power and diameter of the cutting abrasive wheel. Its weight is also important, since you often have to work “in weight,” and its dimensions so that you can do work in inconvenient and hard-to-reach places.

Most buyers, when they see a powerful grinder, are somewhat frightened by the fact that it is more difficult to cope with it than with a low-power one. This is a misconception. With low-power grinders, disks jam more often, i.e. They physically cannot “pull out” the disk under heavy loads.

The situation, how the disk and the machine itself will behave after reducing the load, is unpredictable. Most likely, the grinder will be torn from your hands. The consequence of this will be a fracture of the disk, damage to the machine and injury to the cutter.

Therefore, it is better for beginner craftsmen to purchase an angle grinder for a 125 mm disc with a power of 800-1000 W and a spindle speed of 10,000 rpm. This power is enough to cut iron.

For cutting metal, there are machines for 115 mm discs powered by batteries, but, as practice shows, given their high cost, they do not justify themselves in solving everyday problems.

The handles of the grinder should be rubber or made of a material that will dampen vibrations from the machine.

But no technical characteristics reflect convenience and safety in operation. The grinder should fit comfortably and securely in your hand so that when working with metal, you can focus your attention on it, and not on how to hold the tool in your hands. It is desirable that the handles be rubber or vibration-damping material with indentations for the fingers.

Low-power grinders, as a rule, do not have an additional handle.

If you find any inconvenience when choosing, you should look for an angle grinder of a different model.

How to choose the right wheels

There are symbols on the circle that will help you choose the right circle.

https://www.youtube.com/watch?v=yNYDu6XSIAw

When choosing disks, you need to know what they will be used for, pay attention to their diameter and thickness. These are the main parameters of the disks.

The smallest diameter is 125 mm, and the maximum publicly available is 250 mm. In professional grinders, the discs may have a larger diameter.

The thickness of the cut part and the maximum depth of the cut depend on the diameter of the disk.

If you plan to cut only metal, you need to purchase a cutting disc. It has the smallest thickness from 1 to 1.2 mm, for industrial angle grinders - up to 2.5 mm. This will ease the physical load on the grinder and the worker. The cut is neat.

If you plan to carve shapes on thin metal, then it is done with a disk of the smallest diameter or an old, almost used disk.

Many people believe that you need to use a diamond blade to cut metal. This is a completely wrong opinion. The diamond blade will simply get stuck in the metal and will be unsuitable for further work.

Experts say that even beginners do not encounter any particular difficulties when cutting metal with a grinder.

Basic rules for safe work when cutting metal with an angle grinder

Layout of the most dangerous sectors when working with an angle grinder, taking into account rebound and destruction of the disc.

The most necessary condition when cutting is strict adherence to safe work rules.

Manufacturers of angle grinders are constantly trying to minimize the risk of injury and injury by inventing and improving various protection systems. But no one will take care of the employee like he himself.

The main dangers that arise when cutting metal are the flying out of fragments of a broken disk, a flow of sparks and tiny abrasive particles, and the inability to hold the tool in your hands.

If the disk breaks or gets jammed, the angle grinder can break out of your hands at the most inopportune moment and with great force, so even before starting work, you should foresee the direction of its possible movement.

Safety rules cannot be neglected even when performing minor work.

Before starting work you should:

1. Protect your face, eyes, hands and, if possible, all parts of your body.
2. Remove all flammable materials and objects that are in the direction of the sparks.
3. If possible, secure the part being processed with a grinder in a vice. It is prohibited to hold the workpiece with your free hand or press it with your feet.
4. If you are installing a new disk, you need to “scroll” it with a grinder at maximum speed, placing it further away: the disk may turn out to be defective and fly into pieces.
5. Install, adjust and secure the protective cover.

It is best to protect your face with a special shield when working with an angle grinder.

During work you should:

1. When replacing disks during rest, you must disconnect the angle grinder from the network.
2. Use goggles or a face shield to protect your eyes and face—professionals use both during long periods of work.
3. Hold the grinder firmly during all work.
4. To replace the disk, you need to wait until it stops completely.
5. Work in protective gloves. It is not advisable to use cotton mittens; they do not provide sufficient protection, they can catch fire, and the threads can wrap around the grinder spindle or disc.
6. During work, you need to position yourself so that your face, and, if possible, all parts of your body, are not in the plane of rotation of the disc.

Upon completion of work you should:

• wait until the rotation of the disk has completely stopped and only after that put the tool on the floor with the disk facing up so as not to damage it;
• disconnect the grinder from the network;
• make sure there is no smoke or other signs of fire.

A typical mistake made when cutting metal: if the diameter of the new circle is larger than the size of the protective casing, it is removed. The casing is a protection in case the disk breaks and falls into pieces during metal cutting.

Instead of a disk, many people use cutters, saws or other available materials. Doing this is strictly prohibited.

If long pipes lie on supports, you need to cut off their overhanging edge. If you cut them in the middle, then due to its own weight the metal will bend and jam the disk.

If you do not have the skills to handle an angle grinder, then before starting work you should learn how to cut unnecessary parts.

The cutting wheel only takes radial forces. Attempting to change the cutting plane while the blade is inside the metal part will result in its failure.

The heel of the disc (the near lower part of the circle) cuts metal more efficiently.

In order for the grinder and discs to serve for a long time, every 5-7 minutes of work you need to take a break for 20-30 minutes. This rule is especially important for low-power angle grinders who are afraid of overheating.

To increase the service life of discs, especially expensive ones, and to cool the metal, the cut area should be watered with water. It is advisable to carry out the work together.

Aluminum is a very viscous metal. When cutting a piece of large thickness, you need to drip kerosene into the seam, observing fire safety rules.

For molding, cutting tin, and figured carvings, you should use worn out disks - “bits”, so you shouldn’t throw them away right away.

It is correct to cut the corner not in one step, but separately both shelves.

If pipes, angles, or fittings are long enough to rest on supports, cut the overhanging edge correctly. If you cut between the supports, the part will bend due to its own weight and jam the disk.

Parts of large thickness are cut only in a straight line. If you need to cut out a shaped part, first straight cuts are made, then the remaining unnecessary parts are removed.

You should not put pressure on the grinder. This will lead to jamming or breakage of the disc and overheating of the angle grinder. If the cutting process is slow, the blade should be replaced.

The resulting cut should not be processed with the side of the disk. A different type of disk is used for this.

Molten particles of metal and abrasive, falling on plastic products, glass and car headlights, stick to them, and then it is almost impossible to remove them. Therefore, they must be removed or protected before work begins.

Is it possible to use a grinder for cutting metal tiles and corrugated sheets?

At the time when metal tiles and corrugated sheeting had just begun to be used, the instructions stated that using a grinder to cut these roofing materials was strictly prohibited. This is explained by the fact that on both sides they are protected with zinc and polymer coatings and painted.

The abrasive disc heats and melts the material. The cuts are torn. Flying sparks will also damage the paint. All this causes corrosion of the material and a decrease in service life.

However, recently builders have begun to use an angle grinder for this work. This makes the work much easier; it can be done directly on the roof. After cutting, the edges must be treated with anti-corrosion agents, primed and painted.

Brief conclusions

Cutting metal correctly with a grinder is not difficult. Everything can be learned. The main thing is to follow safety rules and follow recommendations.

Source: https://qteck.ru/kak-pravilno-rezat-metall-bolgarkoj-vyrezat-kruglye-otverstiya-pilit-truby-obrezat-proflist.html

How to cut a round hole in glass? — Metals, equipment, instructions

If you need to drill glass, the easiest way is to entrust this task to a specialist. But firstly, such services are not cheap, and secondly, there are people who like to make things on their own. Let's try to figure out how to make a hole in glass without damaging it. Let's look at what tools you can use and how quickly and accurately you can complete the work ahead.

Preparatory work

Before drilling glass at home, you need to carefully prepare it:

• Using ethyl alcohol or turpentine, wipe the surface. This is necessary in order to degrease it.
• During work, it is unacceptable for the sheet to slip, so this point must also be taken into account.
• Choose a base so that the entire sheet rests on it.
• Before starting work, mark the place where you will drill. Use construction tape or a marker for this.
• If drilling glass yourself is a new job for you, then practice on small pieces first to avoid damaging the main sheet.
• The drilling process is quite slow. There is no need to press on the glass to get the job done faster.
• Position the drill at right angles to the plane. Don't try to make the hole right away. Let the glass cool periodically.
• Once the perforation is almost done, turn the sheet over and finish the work on the other side. This will allow you to obtain perforations of the correct shape, and at the same time avoid chipping and cracking.
• If small roughness or irregularities have formed on the surface, treating the glass with fine sandpaper will help get rid of them.

How to drill glass at home with a regular drill?

To successfully complete this task, you will need:

1. A set of drills used for metal or ceramics.
2. Screwdriver or low-speed drill.
3. Plasticine.
4. Turpentine.
5. Alcohol.

Operating procedure:

• Place the glass sheet on a flat surface.

Important! Be careful not to overhang the edges.

• Set the screwdriver or drill to the lowest rotation speed.

Important! The drilling speed ranges between 250 and 1000 rpm.

• Clamp the desired drill bit into the chuck.
• Using an alcohol solution, degrease the surface, and then make a plasticine depression in place of the future hole.
• Pour some turpentine into it and start working with a drill.
• Do not press too hard on the tool as this may cause cracks.

Using sand

This is a fairly old method. It was used when screwdrivers and drills were not available. To drill glass with your own hands using this unusual method, you will need:

1. Petrol.
2. Sand.
3. Tin (can be replaced with lead).
4. Gas-burner.
5. Metal mug.
6. Sealing wax.

The algorithm of actions is as follows:

• Degrease the surface with gasoline.
• In the place where the hole is to be made, pour a little moistened sand.
• Using a sharp object, make a hole in the sand, the diameter of which is equal to the size of the future perforation in the glass sheet.
• Melt tin or lead in a metal mug using a gas torch.

Important! If you don’t have a burner, you can heat the metal in a mug and on a gas stove.

• Pour molten lead into the prepared hole.
• When the metal has hardened, remove the sand and remove the frozen glass. The resulting hole will be perfectly shaped and will not need to be processed.

How to drill a hole in glass at home using a homemade drill?

To make a homemade drill, you will need a diamond roller from a glass cutter and a metal rod:

1. Saw a groove in the rod to insert the roller into. It must be secured so that it is motionless in relation to the metal rod.
2. Fix the drill made in this way in a screwdriver or drill and start drilling. This is the same as using a diamond-coated drill bit to perforate.

Important! If for some reason you cannot buy a factory-made drill, then you can make it yourself.

There is another way to independently prepare a drill for work in order to drill glass at home:

1. Clamp a regular drill bit in pliers and hold it over the flame of a gas burner for a few minutes.
2. After the instrument is white-hot, cool it with sealing wax.
3. After the drill has cooled, remove any remaining sealing wax.
4. With this simple manipulation, you get a durable tool that can be used to make holes in a tempered glass sheet.

Helpful Tips:

• To avoid cracking of the material, apply a little turpentine or honey to the surface at the drilling site.
• Do not press the screwdriver or drill while working, do not swing the tool from side to side.
• Take breaks of 5-10 seconds. During breaks, place the drill in a container of cold water to cool.
• If you choose between a drill and a screwdriver, give preference to the latter, since the drilling mode in this case will be more gentle.
• To treat the surface, you can use either a solution of ethyl alcohol or acetone.
• Do not forget about safety precautions - you need to wear safety glasses and gloves when working.
• Minimum distance from the drilling point to the edge of the sheet: 15 mm - for fragile types, 25 mm - for ordinary glass.
• It is advisable to place the glass sheet on a wooden surface.

Application of glass cutter

With this tool you can create holes of large diameter or complex shapes. The algorithm of actions is as follows:

1. Using a marker or felt-tip pen, draw contours for subsequent processing.
2. Press the tool smoothly and evenly; do not make sudden movements.
3. To make the cut part fall off, gently tap the surface with the handle of the tool.
4. To remove any remaining glass, use special tweezers.

Important! Before you start working with glass, check the condition of the tool. It is necessary that the roller is in the center of the glass cutter and rotates freely and evenly.

Making holes in unusual ways:

1. To drill tempered glass, prepare a special coolant. It must be prepared in this order. Dissolve aluminum alum in acetic acid. You can prepare the liquid in another way: mix camphor and turpentine in equal proportions.

   Treat the glass with a solution and start drilling a hole.

2. If you don't have a drill, you can use copper wire clamped into the drill.

   In this case, the following composition must be applied to the drilling site: camphor (1 part), turpentine (2 parts) and a little abrasive powder, scraped off with coarse sandpaper.

3. Instead of a drill, you can use a piece of metal pipe. Make a ring from plasticine (diameter 5 cm, height 1 cm). Pour a mixture of sandpaper powder, turpentine and camphor into it. After that, start drilling.

material

We hope that the tips outlined in this article will be useful to you. Good luck!

Source: https://spb-metalloobrabotka.com/kak-vyrezat-krugloe-otverstie-v-stekle/

How to cut a circle from a stainless steel sheet?

Any design, whether in your home or in production, involves working with metal.

Often, during the operation of this material, the question may arise: how to cut a circle in metal?

It deserves attention, since the labor intensity of the work process and the quality of its result directly depend on the choice of the right tool and technology.

Methods for cutting a circle from thin metal

Metal circles

Metal can be thin or thick and durable, so a variety of tools are used to cut it.

The choice of materials and cutting technology also depends on what diameter the circle is needed and how even it should be.

Using a jigsaw

If you need a perfectly even circle, you can use an electric jigsaw to cut it out.

The work is carried out in several stages:

• First, the thickness of the metal is determined and the appropriate saw blade for the electric jigsaw is selected.
• Before cutting a circle in metal with a jigsaw, the outline of the circle that will be cut is drawn on the working plane.
• Using a drill and a drill (with a diameter of eight to ten millimeters), a hole is cut out from which work will begin.
• A jigsaw saw blade is placed in the resulting gap and cutting continues according to the intended drawing.

Cutting using this tool does not take much time and effort. Moreover, using a jigsaw you can get a circle with perfect edges. But this tool is used only for working with metal of minimal or medium thickness (for example, 2 - 3 mm).

Using an angle grinder

The grinder is used when working with thin metal. You can create a round hole with this tool by following these step-by-step tips:

• Before cutting a circle in metal with a grinder, markings are made so that its contours are clearly visible.
• Along the entire length of the intended drawing, short sections are cut with a grinder disc, which will eventually be connected.
• The figure will look more like a polyhedron than a circle. Therefore, after cutting is completed, the product is processed and cleaned until the edges become sufficiently even and smooth. You can also use a grinder for processing. If the circle has a wide diameter, you can sharpen the contours with a large disk.

When processing a cut circle using a grinder, you should be careful that the disk is inside the hole and, at the same time, is located in the same plane with the work sheet.

Cutting a circle in thick metal

Cutting a circle with a grinder

In order to outline the exact contours of the figure that will be cut out of metal, you should use a ruler, a marking compass and a marker.

First, using a ruler, set the required width of the compass connector so that it matches the required diameter of the circle.

Then the center point of the circle is determined on the metal plane.

Contours are drawn from it using a compass.

So that they are clearly visible during the work, they should be drawn with a marker.

Application of cutting torch

A circle in medium-thick metal can be cut using a gas cutter. The work takes place in several stages:

• The outline of the circle is outlined.
• The instrument burner lights up.
• The combustion torch is adjustable.
• The torch is carefully and slowly drawn according to the drawn drawing.

Using this method, you can cut a hole in metal that is about four or five millimeters wide.

Application of welding machine

Welding machine

If you don’t have a gas cutter at home, you can use a welding machine.

It needs to be adjusted to the highest current level.

Then the burning arc is placed against the contour and held there until a hole is formed.

Then you just need to slowly move it along the drawing until you get an even circle.

But the most important thing is to correctly adjust the power of the tool.

For example, if metal about four millimeters thick is used, a device operating at about 150 amperes is required. If the metal is thicker, the power of the tool will be greater.

To speed up the work process, it is better to use thin electrodes. However, they burn out quickly and need to be replaced. Because of this, there will be a need for frequent heating of the metal, since during the replacement of the electrode it will have time to cool down.

How to cut an even circle from metal with a cutter is shown in the video:

Select it and press Ctrl+Enter to let us know.

Source: https://varimtutru.com/kak-iz-lista-nerzhaveyki-vyrezat-krug/

How to make a hole in a metal sheet?

Any design, whether in your home or in production, involves working with metal.

Often, during the operation of this material, the question may arise: how to cut a circle in metal?

It deserves attention, since the labor intensity of the work process and the quality of its result directly depend on the choice of the right tool and technology.

What and how to drill deep and large holes in metal parts

Drilling large holes is not a problem if you choose the right tool. For example, such work may be necessary to secure a channel or metal corner. The easiest way is to use an electric drill, but getting a hole with a diameter of, for example, 15 mm requires a lot of effort. To drill a large diameter hole in metal, special devices and core drilling technology are used.

Features of creation

When drilling, it must be taken into account that the crown or stepped cone nozzle must be selected in such a way that it has a smaller diameter than the hole being created.

When using different tools, it is also necessary to take into account their features. For example, when drilling with conical products, smooth edges are obtained.

Drill accessories

There are several accessories for drills that can make the process easier and make a large hole smooth:

• Drilling jig. This device is a housing in which there are several guide bushings for drills of different diameters. The material used to create the bushings is harder than drill bits, so you don't have to worry about the tool moving to the side while drilling and widening the hole.
• Drill guide. This product allows you to fix the tool in such a way that it does not deviate to the side during drilling. If such a product is not available, the tool may move to the side, resulting in an uneven edge. It can also be mounted at an angle. But when drilling metal products, this is usually not required.
• Drill stand. A DIY product like this can be an inexpensive replacement for a drilling machine, as it allows you to carry out work more comfortably. When using a stand, a fixed tool moves along the bar using a lever. In this case, displacement is completely eliminated, since the workpiece being drilled is securely held due to the presence of a clamp.

Using these products, you can greatly facilitate the process of drilling metal products.

Feature of deep holes

To drill a deep hole in metal, it is best to use a lathe. Cooling must be done during this process. In this case, the chips must be forcibly removed. Periodically, the tool is removed from the workpiece to remove chips.

When working without specialized devices, you should not recess the nozzle more than 2/3 of its length. Water must be used for cooling during operation. If the work is done in several approaches, changing the angle is not allowed.

Features of large diameter holes

This procedure is more complex than deep drilling. Cutting work is carried out either using a crown or using a cone drill. Crowns for metal are similar to products for concrete and drywall. The only difference is the material used to create the cutting edge.

Drilling can also be carried out with standard products in several stages. To do this, first use a nozzle of small diameter. Then a larger tool is selected.

The most convenient way is to use cone drills. Such devices allow you to drill a large hole in one go. To do this, the tool is simply recessed into the material.

Hassle-free drilling

During work, you can use a small section nozzle, as well as a used grinding wheel for an angle grinder. It is important to remember that it should have a smaller diameter than the hole being created.

Before carrying out work, a circle for the hole is marked on the workpiece, and the second circle will be smaller than the first by a distance equal to the diameter of the drill used. After this, 2 holes are marked in opposite places of the circle. It is necessary to retreat 3 mm from them and mark the places for drilling.

Thus, drilling occurs along the entire drawn circle. If additional work is necessary, some areas will have to be processed with a chisel. This will create jagged edges that will then need to be filed down. It is important to ensure that during work the circumference does not increase, i.e.

do not expand the planned diameter.

Cone drill

The described types of drills are made from tool steel. The shanks of such products can be hexagonal or cylindrical. The cutting edge removes all burrs, so the edge is smooth. The end of the drill head has a sharpened point that allows pre-drilling of the material.

Using these products you can:

• create cuts with a diameter of up to 30 mm;
• forget about jagged edges;
• carry out boring of various diameters without changing the nozzle.

Thanks to step drills, you can create cuts of various diameters in sheet steel up to 4 mm thick. Unlike a simple cone drill, when using such products, the drilled diameter is fixed.

The disadvantages include:

• the need to use tools with low speeds and high torque;
• sensitivity even to small distortions.

Despite these disadvantages, this attachment allows you to conveniently work with metal plates, quickly drilling circles of the required diameter.

Metal crown

Metal processing is a complex process, so such work is usually carried out using specialized equipment. To carry out work at home, you can use core drills.

Such products allow you to make the edges round and centered. In this case, a standard drill is used for drilling. The products consist of several parts:

• crown;
• centering attachment;
• product shank;
• screws that are necessary for fastening.

When using a core drill, the speed of work increases up to 10 times. Another advantage is the ability to accurately drill in the range from 1.2 to 15 cm.

In this case, there is no need to perform alignment during drilling. It is also worth noting that such drills have higher wear resistance compared to twist drills.

Before starting work, a centering drill is installed in the center of the circle, after which drilling is carried out. After this, the drill is retracted and the work is carried out with a crown.

Hole press

One of the common methods is punching using a special press. It happens like this:

1. First, the workpiece is placed on the press table and grabbed by several clamps.
2. The metal is then moved under the punching tool. At this stage, additional fastening of the material occurs using a clamping ring.
3. At the last stage, penetration occurs using a punch.

The revolver can have several nozzles of different diameters, which allows you to quickly create holes of different diameters. Such equipment is usually not used for working with metal in domestic conditions.

If you plan to do the work at home, you should choose a universal tool. This will allow you to easily process metal without worrying about purchasing additional parts. The video presented will introduce you in detail to the technology of the process.

Source: https://oxmetall.ru/sverlenie/glubokie-i-bolshie-otverstiya

2 ways to cut an even circle from metal using an angle grinder

You can cut an even circle from a sheet of metal using an angle grinder (grinder). However, for a better quality cut you will need a device that is easy to make with your own hands.

In this review, the author shows two ways to cut an even circle from metal using an angle grinder.

For the first method, you will need to make a simple rotating stand with a magnet for the grinder.

We recommend reading: a homemade angle grinder for cutting metal workpieces.

Main stages of work

The first step is to make a mount for the grinder. To do this, the author cuts off two metal plates, drills holes in them and attaches them to the gearbox housing using bolts.

After this, you will need to cut another plate and weld it to the first two plates.

Next, the author welds a steel strip to the resulting fastening, the end of which is fixed to the body of the angle grinder using a clamp.

A bolt will need to be welded to the angle grinder mount (in the center of the top plate).

In the next step, the author cuts a piece of a round tube. You need to put a sleeve (from a larger diameter pipe) on the tube with a fixing bolt, and weld nuts to the ends. The author welds two pieces of tube to the bushing.

Next, you need to make another bushing with a lock. It must be welded to a round magnet (can be removed from the old speaker).

Then you can start assembling the device. For convenience, the author screws the handle from the angle grinder into the tube. We install the stand on a sheet of metal, set the desired size and you can cut out a circle.

Turntable manufacturing process

There is also a second way to cut a circle evenly. For this, a previously made rack is used, and it will also be necessary to make a rotating platform.

First, the author cuts a piece of a thick-walled round pipe into which two bearings must be pressed and welded.

After this, a piece of pipe with bearings will need to be welded to a square plate. Four mounting holes must be drilled in the plate.

The author attaches the resulting turntable base to the workbench using bolts.

Next, the author disassembles the second round magnet. A piece of round steel must be welded to the metal plate, the diameter of which is equal to the internal diameter of the bearings in the pipe.

Then the magnet itself needs to be glued back to the plate (the author uses quick-drying glue for this).

The author cuts a circle from a sheet of metal. A magnet with a metal rod is installed in the center. After this, four sections of profile pipe must be welded to the circle.

In each section of the profile you need to drill one hole and then weld the nuts.

The author tightens the bolts into the nuts. Then pieces of a round rod are welded to the bolt heads (you can use square pieces). We insert profile sections of smaller diameter and fix them.

The turntable is attached to a base screwed to the table. The author places a sheet of metal on top, and then installs a stand with a grinder.

For more information on how to cut an even circle from metal using an angle grinder, see the video below.

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Source: https://sdelairukami.ru/2-sposoba-kak-vyrezat-rovnyj-krug-iz-metalla-s-pomoshhyu-ushm/

How to cut a round hole in tile or metal with a grinder - Review

How to cut a round hole with a grinder? Quite often, the question of how to make a hole in a tile accurately and quickly can take home craftsmen who have little experience by surprise. But in fact, there are quite a lot of interesting implementation options. Indeed, the need to create a hole in ceramic tiles may appear at any stage of repair work, even long before everything begins.

This, as well as the diameter of the circle being made, will largely determine how to act in each situation and which tool is best to use to make a round hole in the tile.

Using hand tools

If you do not have electric tools and you do not know what to use to make a hole in the tile, then you can use the simplest method - a tile cutter and tongs (or pliers).

The sequence of actions will be as follows:

1. Before you start cutting a hole in a tile, you should mark the boundaries of the future hole on its surface.
2. To make the material softer, you should soak it in water for a short time beforehand.
3. If you use a glass cutter, make sure to follow the markings and do not tear the cutter from the base. To be able to cut a groove, you should apply enough force to the handle, but so that the tile is intact and does not crack (this is especially true if you have a glossy glazed tile).
4. Along the cutting line, tap the groove with the back of the tool so that it is as deep as possible.
5. Using pliers, break off the material, piece by piece, until you are left with an even cut along the markings.
6. If jagged edges remain, the cut circle should be sanded using fine-grain sandpaper.

The method is labor-intensive, but it will be a great help if you don’t have the right tool at hand. Now let's look at how to use an electric jigsaw.

Using an electric jigsaw

A tool such as an electric jigsaw, which has a diamond wire, has proven itself quite successfully on ceramic material.

When using it, it is possible to create any end-to-end shape in the tile, both in the central part of the tile and on the edge. The latter is sometimes required to install an outlet.

But for the first case, it would be great to have an electric drill and a drill on hand to cut holes in the tile in the place where the outlet will be located.

So, how can you make a round hole with an electric jigsaw?

1. Draw a round hole on the outside.
2. Immediately after this, you should start cutting it out if the element to be cut is located near the edge.
3. In order for the hole to be centrally located, you should first use a drill to drill a small diameter hole on the ceramic in the place where there will be space for installing the socket. A cutting thread should be passed through it and the tool should be brought to the edge of the cutout.
4. Slowly insert the device along the marking line. You should gradually retreat inward from the line, while trying not to capture additional areas. You should use the same method to cut the hole with a standard hacksaw, but then do not count on good quality of the cut.

As you can see, the method is quite simple and convenient.

Grinder and its use

The grinder is an absolutely excellent tool. Often, thoughts about how to create a hole in the tiles appear precisely at the moment when laying the tiles is required and it is necessary to place it under the pipes, toilet and faucet. The grinder makes it possible to process ceramics when they are not yet attached to the wall. such a tool will also be appropriate for performing figured cutting on the edge of a tile square.

How to cut a hole in a tile using a grinder:

1. Mark a line that will serve as a guide when cutting.
2. The grinder should be equipped with a diamond disc, which is used for the dry method.
3. You should start cutting from the side where you feel most comfortable. Insert the instrument slowly, moving it slightly away from you to the side.
4. If it is inconvenient to work, make a semicircle, and then start moving with the tool in a different direction. But keep in mind that in this case you should make sure that the cutting points coincide.

The grinder is the most convenient for creating round holes.

Scouring tiles

The second option for creating tiled holes assumes that the tile will be fixed to the wall. in this case, you should use the classic method, in which the wall is scored with a drill. When working on cladding material, use either a cone drill or a typical twist drill.

To create holes in a tile using a simple drill, you will need to do the following:

1. To reduce the sliding of the cutter, you should cover the ceramic surface to be treated in the drilling area using masking tape. This will make it possible to keep everything in its original position.
2. Place a point where you want to drill.
3. Drill with a rotary drill at low speed.
4. To avoid overheating of the nozzle, you should wet it a little from time to time. You can also spray the trim, but only after you have gone a little deeper into the wall so that the drill does not slip off. If you need to create a large hole, you should do it a little differently. The beginning of the work will be similar, but after that you should replace the drill with another one with a larger diameter. We recommend gradually widening the drill, and this will help reduce the risk of chipping to zero.

Please note that there is another way to create a larger notch. For the border of the future hole, use a thin drill to make many holes. After this, you should carefully knock out the central part and sand the nicks.

Working with special attachments

So, what else can you use to make a round hole? In addition to standard glass and tiled surfaces, there are other alternative attachments for the drill.

Diamond-coated bits can be used if you need to cut out a socket outlet, tap out a faucet in a bathroom, or other areas. Drilling is performed by rotating the crown, which is placed on the guide drill.

 The accuracy of creating an opening will be largely determined by the properties of diamond-type sputtering and the size of the grains. The disadvantage of this method is that the cost of the crown is quite high.

Using a crown, the hole is made as follows:

1. Place some masking tape on the ceramic.
2. The cutting contours are drawn.
3. Attach the tool with a crown, and then begin to smoothly insert it deeper and deeper.
4. To prevent overheating, the crown should be periodically moistened.

A tile drill, otherwise called a “ballerina”, makes it possible to create round holes with a large diameter. The principle of operation of such a device is reduced to the following - the electric tool is activated, which is reflected in the drill simultaneously with the cutter, which is movable and mounted on a rod.

Due to this, it is possible to move the cutter and shift it along the rod, and you also have the opportunity to set the parameters of any circle within the reach of the rod size. The convenience is that you do not need to spend a lot of money buying many crowns with different diameters. Another advantage of the method is that the cost of the device is affordable for a wide range of users.

The operation is performed as follows:

1. A dot is placed in the center of the diameter of the circle.
2. Adjust the circular drill according to the diameter you choose.
3. They pass through the glazed thickness.
4. Make a recess on the second surface of the element.
5. They cut the circle from the outside.

Despite the fact that this method has many advantages, there are also disadvantages, namely:

• You can't make many cuts with this device.
• The number of cuts is limited and equal to 30-40.
• The drill should be used with extreme caution, and should only be turned on at low speeds, as otherwise it can easily chip.

If you are going to use any of the methods described above, you should never use a percussion instrument. Its use can negatively affect the integrity of the tiled element.

Knowing the methods for drilling tiles will help you choose the one that will be best suited for the job you are doing. During repairs, you may repeatedly need to create holes in the tiles for pipes or sockets.

Moreover, such a need may arise both after installation and during.

Let's look at how to deal with both situations and what tools you can use. When doing tiling work, you can’t do without drilling tiles. Most often, in order to make a round hole in the tile, you need to do it at the installation stage. Until the material is attached to the surface, this cannot be done. The tool will come in handy more than once when tiling walls and floors. It is also suitable for curly cutting along the edge of the tile.

How to make a hole in a tile using a grinder:

1. Select the outlines.
2. Arm yourself with a diamond blade for dry cutting.
3. Start cutting from the edge that is most convenient for you. The tool should be guided smoothly, away from you, and also hold the tile with your hand so as not to damage your fingers.
4. If the working surface is not comfortable, you should stop in the middle and bring the grinder from the other edge, but in this case there is a high risk that the cut line will come off. You should only work on the front side of the tile to avoid chipping.

As you can see, everything is not so complicated, and you have the opportunity to choose the tool that will be appropriate in your case.

( 8 average 3.13 out of 5 )

Source: https://domsdelat.ru/instrumenty/kak-vyrezat-bolgarkoj-krugloe-otverstie.html

How to cut a hole in large diameter metal? — Machine tools, welding, metalworking

Any design, whether in your home or in production, involves working with metal.

Often, during the operation of this material, the question may arise: how to cut a circle in metal?

It deserves attention, since the labor intensity of the work process and the quality of its result directly depend on the choice of the right tool and technology.

How to Cut a Circle in Metal with a Grinder

How to cut a hole in metal at home

You can cut any holes accurately in metal

Unfortunately, for home workshops such high-precision equipment is a luxury if they have to use other methods, some of which are quite extraordinary.

How to cut an even circle from metal

How to cut a circle in metal: best methods and valuable tips

Any design, for example in your home, in production, involves working with metal.

Often, during the operation of this material, the question may arise: how to cut a circle in metal?

It deserves attention, since the complexity of the process of performing the work and the quality of its result directly depends on the choice of the right tool and technology.

How to cut a circle with a grinder part 1

How to cut in a circle with a grinder , without any tools. Photo in mine:.

When processing a cut circle using a grinder, you should be careful that the disk is inside the hole and, despite this, is located in the same plane with the work sheet.

How to Cut a Circle in Metal with a Grinder - Basing

How to cut a circle in metal: best methods and valuable tips

Any design, for example in your home, in production, involves working with metal.

Often, during the operation of this material, the question may arise: how to cut a circle in metal?

It deserves attention, since the complexity of the process of performing the work and the quality of its result directly depends on the choice of the right tool and technology.