How to cut a circle in metal with an angle grinder

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

Metal can be thin, or thick and strong, 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 required and how smooth it must be.

Using a jigsaw

If there is a need for a perfectly flat circle, you can use an electric jigsaw to cut it.

  • First the thickness of the metal is determined and the appropriate saw blade for the electric jigsaw is selected.
  • Before you cut a circle in the metal with the jigsaw, the contour of the circle to be cut is outlined on the working plane.
  • Using a drill and a drill bit (eight to ten millimeters in diameter), the hole with which the work will begin is cut out.
  • The saw blade of the jigsaw is placed in the obtained slot and the cutting continues according to the outlined drawing.

Cutting with this tool does not take much time or effort. over, with a jigsaw, it is possible to obtain a circle with perfect edges. But this tool is used only for work with metal of minimum or average thickness (for example, 2. 3 mm).

Using an angle grinder

The angle grinder is used in work with metal of small thickness. To form a circular hole with this tool, you can follow these step-by-step tips:

  • Before cutting a circle in metal with an angle grinder, a marking is carried out so that its contours are clearly visible.
  • Along the entire length of the planned drawing the disc of the angle grinder cuts short sections, which finally join.
  • The shape will be more like a polyhedron than a circle. Therefore, once the cut is complete, the product is machined and deburred until the edges are sufficiently flat and smooth. You can also use an angle grinder for work. If the circle has a wide diameter, you can sharpen the contours with a large disc.

Machining the cut out circle with an angle grinder, you should be careful that the disc is inside the hole and, at the same time, was located in the same plane with the working sheet.

What to work with?

Using a hand tool

If you do not have electric tools available, and you do not know with what to make a hole in the tile, it is possible to use the simplest way. a tile cutter and pliers (or pliers).

The sequence of actions will be as follows:

  • Before you begin to cut the hole in the tile, you should mark the borders of the future hole on its surface.
  • Soak the material in water beforehand in order to make the elements softer.
  • If you are going to use a glass cutter, that it is necessary not to tear off the cutter from the base. To get to cut a groove, you should put enough effort on the handle, but so that the tile is intact and does not crack (this especially applies to the situation if you have a glossy glazed tile).
  • Along the line of the cut, with the back of the tool, tap the groove to make it as deep as possible.
  • Use pliers to break off material, piece by piece, until you have a straight cut along the marked line.
  • If the edges will remain jagged, then the cut circle should be sanded with fine grit sandpaper.

The method is labor-intensive, but a great help if you do not have the right tool at hand. Now let’s look at how to use an electric jigsaw.

Using an electric jigsaw

Such a tool as an electric jigsaw, which has a diamond wire, has proved to be quite successful on the ceramic material. When using it, it is possible to create any through figure in the tile, and in the central part of the tile, and on the edge. The latter is sometimes needed to install the socket. But for the first case, it would be great to have an electric drill and a drill bit on hand to cut holes in the tile where the outlet will be.

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

Marking the metal

Before you cut a circle in the metal, you must mark it. For this you will need a mallet, a puncher, a compass and a marker.

  • Place the workpiece on a flat surface.
  • Mark the center of the hole with a punch and a mallet.
  • Use the compasses to draw a circle on the metal with the required diameter.
  • Draw the outline with a marker.

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Please note! The cutting line for the trimmer should be on the outside of the circle. This is needed to get the part with the desired diameter.

Using a welding machine

If you don’t have a gas torch in your home arsenal, you can use a welding machine.

It should be set to the highest current level.

Then a burning arc is inserted into the contour and held until a hole is formed.

Then you just need to slowly run it along the drawing until you get a smooth circle.

But most importantly. Adjust the power of the tool correctly.

For example, if you use metal that is about four millimeters thick, you need a device that operates at about 150 amps. If the metal is thicker, the tool will have more power.

To speed up the work process, it is best to use thin electrodes. But they burn out quickly and need to be replaced. This will make it necessary to heat the metal frequently, because it will have time to cool down during the electrode change.

How to cut an even circle of the metal cutter shown at

Marking the metal

Before you cut a circle in the metal, you need to draw a marking. You will need a mallet, a puncher, a compass and a marker for this.

  • Place the workpiece on a flat surface.
  • Mark the center of the hole with a punch and mallet.
  • Use a compass to trace a circle on the metal to your desired diameter.
  • Draw the contour with a marker.

Notice! The cutting line for the trimmer should be on the outside of the circle. This is necessary in order to get the part with the required diameter.

How to cut a round hole in tile or metal with an angle grinder. Review

How to cut a round hole with an angle grinder? Quite often the question of how to make a hole in the tiles neatly and quickly, can take home craftsmen who have little experience. And in fact there are quite a few interesting options for implementation. Indeed, the need to create a hole in a ceramic tile can appear at any of the stages of repair work, even long before the whole.

This, and also the diameter of the prodelogo circle will largely determine how to act in each situation and what the best tool to use to make a round hole in the tile.

How to cut a circle with an angle grinder

in metal: best practices and valuable tips

Any construction, such as in your home, production, involves working with metal.

Not infrequently, in one’s time of using this material, the question may arise: how to cut a circle

It deserves attention, because the choice of the right tool does not technology directly depends on the labor intensity of the process of implementation of the work not the quality of its result.

How to cut a circle of thin metal

Metal is thin, as it is also called thick not strong, for its cutting a variety of tools are used.

The choice of materials not cutting technology also depends on how well you can pick up the studio, what diameter is necessary The circle

Jigsaw use

If there is a need for a perfectly flat circle, use an electric jigsaw for its cutting.

  • First determine the thickness of the metal is not selected appropriate saw blade for jigsaws.
  • Beforehand, before you cut a circle in the metal with the jigsaw, on the working plane the contour of the circle to be cut out is outlined.
  • By means of a drill not a drill bit (in diameter ranging from eight to ten millimeters) cut a hole, with which the work begins.
  • In the obtained slot is placed a saw blade of the jigsaw not cutting continues according to the outlined drawing.

READ Grinding wheel for angle grinder on concrete

Cutting with the application does not take a long period of no effort. In addition, using a jigsaw, you will obtain a circle with perfect edges. Alas This tool is used only for metal of minimum or average thickness (nettle two. three mm).

Using an angle grinder

angle grinder is used when working with metal of small thickness. There is an option to form a round hole with this tool by following these step-by-step tips:

  • Beforehand before cut out circle in the metal angle grinder, a marking is made so that its contours are clearly visible.
  • Along the entire length of the outlined drawing, short sections are cut out, which will eventually join together.
  • The shape will be more like a polyhedron than a circle. Therefore, once the cut is complete, the product is machined not deburred until the edges are sufficiently flat not smooth. For machining there is also an option to use an angle grinder. If the circle has a wide diameter, trim the contours of course a large disc.

How to cut a circle with an angle grinder part 1

to cut in a circle. Without any gadgets Picture in my :.

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Machining the cut circle with an angle grinder, you must be careful that the disk is inside the hole is not, in spite of this, was in the same plane with the worksheet.

Cutting a circle in thick metal

In order to outline the precise contours of the figure that will be cut from the metal, you should use a ruler, a compass marker not a marker.

First, using a ruler, set the required width of the circular socket, so that it corresponds to the required diameter of the circle.

Then on the metal plane is determined by the central point of the circle.

From it, using a compass, the contours are outlined.

To make them clearly visible in the robot, they should be drawn with a marker.

Using a gas torch

You can certainly cut a medium-thickness circle in metal with a cutting torch. The work is done in stages:

  • The contour of the circle is drawn.
  • The torch of the tool is ignited.
  • Adjust the burning torch.
  • Carefully and slowly the torch is carried along the drawn outline.

The hole in the metal, which has a width of about four or otherwise five millimeters.

Using a welding machine

If you do not have a cutting torch at home, use a welding machine.

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It needs to be adjusted to the highest level of current.

Then the burning arc is brought to the contour and held at it until a hole is formed.

Then you just need to slowly guide it along the drawing, until an even circle is impossible.

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

Nettle, if the metal thickness of about four millimeters is used, you need a device that operates at a power of about one amp. In that case, the metal is thicker than the power of the tool simply will not.

To speed up the process of work, it is better to use thin electrodes. However, they burn out quickly and do not need to be replaced. Because of this there will be a need for frequent heating of the metal, because in time to replace the electrode it will have time to cool.

What is actually how to cut an even circle out of metal with a cutter, presented at

How to cut a round hole in metal with an angle grinder

Greetings friends. angle grinder, as we used to call it in everyday speech, is one of the most useful and necessary tools in the arsenal of any handy man. And today we will look at such an interesting topic, and how the angle grinder can cut a round hole in the metal. For example we will take a piece of 12 channel and a piece of sheet metal, 2mm thick.

Nakernili, and using a caliper marked two circles with a diameter of 80mm. The photo calliper, it is undesirable to draw on the metal, for this purpose there are special calipers and simply a pair of compasses on metal. But once every five years they can mark something, will not fade, by the way this picture will be 15-20 years old, and still fit, although occasionally do them marking. Our job will be to cut a round billet out of the sheet metal, and we will make a round hole at the base of the channel. The thickness of the base of the shelf is 5 mm.

For this we need to pick up the disc with the angle grinder with the smallest possible diameter. We choose and put it on the angle grinder.

Then we do as accurately as possible shallow sawing by the already marked circle on the channel and a sheet metal. At the same time, try to file by driving the angle grinder at the same speed and constantly turning it in the direction of the circle.

Then we do this. In sheet metal we cut a piece with our circumference and make a few cuts-completely cut through, from the edge and to the edge of the circumference. And in the channel on the contrary, we cut a window in the center of the circle and also full cuts and go to the circle itself, we get these segments.I’ll tell you right away that in thick metal it is better to make a notch for the segments more often. it will be easier to remove them. I made too big segments on the channel, but I have a device. a crocodile, which will help me break them off.

We start to remove the unwanted segments of the metal sheet at 2mm using pliers, you do not have much trouble, everything is easy to remove. a few times I bend up and down and that’s it. There is more work to be done with the thicker channel metal. Break off unwanted segments with a hammer and in my case a crocodile tool. So it is better to saw these segments smaller, so you can only use a hammer, but it is better to use two of them, you put one on and hit it with the other.

And so we have reached our goal. We have cut the circle in the metal in 2 mm, and cut a circle in the metal 5 mm.

But there is another way, without cutting out these small unnecessary segments.

We also take a piece of thick metal. 5mm. Mark the circumference with a caliper and make a precise cut with a small disc, as in the first case. Then along this notch simply continue round after round to make a kerf angle grinder, trying to move at the same speed and constantly turn the angle grinder to the side of the circle. And that’s how we cut the metal circle to the end.

Here are some ways to cut a round hole in metal with an angle grinder. What we have going on with the dimensions we originally set with these cutting methods?

When you cut a circle out of the metal like in the first case, then this circle will not particularly move away from the size of the marking, well, maybe a couple of millimeters. But if you cut as on the last photo, that way the jigsaw will take a lot of metal, and if you need to make a more accurate size of this pancake, it is safely possible to add when marking to the desired diameter of 6-8 mm.

How to cut a circle in metal with a welder

Note! Welder with a maximum amperage of 150 amps can cut sheet metal up to 4 mm thick. To work with thicker workpieces, you need a power tool with increased capacity.

Thin electrodes are used to cut circles in the metal with welding machines. This saves time. But the thin electrodes must be changed often. This requires warming up the metal after installation of new consumables.

Pictured : Heavy Duty Domestic Welding Machine (Maximum Amperage 400A)

How to cut a circle in metal with a jigsaw

You can cut a circle in a sheet of metal of small to medium thickness with a jigsaw. The process looks like this.

  • Match thickness of metal with appropriate jigsaw blade.
  • Equip your power tool with a fixture.
  • Before you cut a circle in the sheet metal, mark out the workpiece.
  • Drill a hole with an electric drill where you will begin to cut the circle.
  • Turn on the jigsaw and get to work. Cut circles in the metal strictly on the contour.

Important! Consider the following features of using jigsaws to cut circles in metal.

  • The fewer the teeth on the blades, the better. The trimmer blade will cut more accurately.
  • Cutting circles in sheet metal with the jigsaw is reciprocating.
  • Carefully control the angle of the blade to avoid errors and inaccuracies.
  • When cutting a circle in metal, the likelihood of blade breakage is greatly increased. Acquire some cutting accessories just in case.

Picture : cutting out a circle in metal with a jigsaw

One more thing! Do not forget to use coolant.

How to cut a circle in thin metal

Metal can be thin or thick and strong, so different tools are used for cutting it.

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

Using the jigsaw

If you need a perfectly flat circle you can use an electric jigsaw to cut it.

  • First determine the thickness of the metal and select an appropriate electric jigsaw blade.
  • Before you cut a circle in the metal with the jigsaw, the contour of the circle to be cut out is outlined on the working plane.
  • Use a drill and a bit (eight to ten millimeters in diameter) to cut a hole, which will begin the work.
  • In the obtained gap is placed a saw blade of the jigsaw and cutting continues according to the outlined drawing.

Cutting with this tool does not take much time or effort. over, you can get a circle with perfect edges by using a jigsaw. But this tool can only be used to work with minimal or medium thickness metal (for example, 2. 3 mm).

Using an angle grinder

The angle grinder is used when working with metal of small thickness. Form with this tool a circular hole can be formed by following these step-by-step tips:

  • Before you cut a circle in the metal with an angle grinder, a marking is made so that its contours are clearly visible.
  • Along the entire length of the outlined drawing with the disc of the angle grinder cut short segments, which will eventually join.
  • The shape will be more similar to a polyhedron than a circle. Therefore, once the cut is complete, the product is machined and deburred until the edges are sufficiently flat and smooth. You can also use an angle grinder for machining. If the circle has a wide diameter, the contours can be ground with a large disc.

Machining a cut circle with the angle grinder should be careful to keep the disc inside the hole and, at the same time, was located in the same plane with the worksheet.

How to cut a circle in metal with a welder

Note! A welding machine with a maximum amperage of 150 ampere can cut sheet metal up to 4 mm thick. Larger power tools are needed for thicker workpieces.

To cut circles in the metal welding machines use thin electrodes. This saves time. But thin electrodes need to be replaced often. This necessitates warming up the metal after installing new consumables.

Picture: powerful household welding machine (maximum amperage. 400 amps)

How to cut a flat hole in metal with an angle grinder

в. My method is suitable for metals from 1 to 5 mm approximately, more

Metal has different thicknesses, and not all thicknesses can be handled by any welder. So with a device of no more than one hundred and fifty amps you can cut metal with a thickness of no more than four millimeters.

How fast you can cut with this method depends greatly on the thickness of the electrode. The fastest work is done with thin electrodes, but they have their own drawback. rapid combustion, leading to frequent electrode replacement. How to cut with an angle grinder without only in this case to cut a pipe large. During electrode replacement, the metal has time to cool down and has to be heated up first.

Working safely with an angle grinder

It is the angle grinder most often used for cutting circles in metal at home, t. к. this tool has become as widespread as possible. Let us tell you about the important features of the correct processing of blanks.

Preparing for work

  • Wear protection. You will need:
  • Clothes made of thick fabric;
  • protective gloves (cotton accessories are not recommended; they do not provide reliable protection and are easily flammable, the threads sticking out may become wrapped around the rotating mechanisms);
  • Wearing safety glasses or goggles;
  • Respirator (optional).

Photo : Protective clothing and accessories for cutting metal with angle grinder

  • Remove all combustible materials and objects that can catch sparks.
  • Clamp the workpiece securely, e.g., in a vice or with a clamping clamp. Do not grip or press the workpiece with your foot.
  • If you are clamping a new disc, spin it idle at maximum rpm beforehand. That way you can be sure there are no defects.
  • Before you cut a circle in metal with the angle grinder, install the safety guard and adjust it.

Cutting metal safely and correctly with an angle grinder

  • While working, keep your face and most of your body out of the plane of the disc rotation if possible.
  • Hold the tool as tightly as possible.
  • Avoid sudden movements. Cut the metal smoothly.
  • The change of discs is made on completely stopped tools.
  • Unplug the machine before servicing.
  • Take a break (20-30 min) every 6-7 minutes if you work continuously. It will extend the life of the equipment and consumables.
  • Use coolant. To cut a straight circle out of metal with an angle grinder, plain water will work great. If you are cutting aluminum, use kerosene.
  • Do not overpressure the angle grinder. This leads to tool overheating and disc breakage.

Finishing work

  • Wait until the rotating mechanism has come to a complete halt.
  • Place the tool with the disc facing upward.
  • Unplug the angle grinder.
  • Check that there is no smell of burning.
  • Remove the disc (if necessary).
  • Put the tool in storage.

Picture : A great way to store your angle grinder

Recommendations for cutting metal pipe

Cutting pipes of different metals is a popular operation in repair and construction work. Products have to be cut when installing sewer and heating systems, water lines. In this direction, the angle grinder copes well with various tasks. Disks for work are chosen according to the material from which the pipe is made.

The use of an angle grinder makes it possible to

  • To re-saw the pipe at different angles, such as 45 and 90 degrees;
  • cut large-diameter products;
  • Evenly cut square or rectangular tubes;
  • make longitudinal cuts in tubular workpieces
  • Saw cast iron pipes;
  • to cut thin-walled pipes.

If it is necessary to cut a pipe of large diameter, then the use of angle grinder allows to perform this work without considerable expense. But in this case, the productivity of work is small, and the risks are considerable. When long pipes are resting on supports, only the overhanging parts are sawed off. If you cut in the center, the edges of the cut will jam the cutting wheel, which will lead to jamming the tool and possible injury.

Specialists not only cut pipes from different materials at the desired angles, but also cut holes in them in the desired shapes. Work with profile and round billets is performed in a similar way, with the mandatory observance of safety rules.

Sawing pipes at different angles

To cut at an angle of 45 and 90 degrees round and profiled pipes is necessary when laying various utilities. In any case it is necessary to saw off the pipe exactly, so that the elements that need to be connected, as tightly as possible joined to each other.

Cut at an angle of 45 degrees cylindrical section pipes spend as follows:

  • Take a normal square piece of paper;
  • Fold it exactly diagonally;
  • this template is used to wrap the pipe;
  • with a chalk or other marking device draw the future line for the trimmer of the cut;
  • remove the template;
  • Clamp the workpiece in a vise;
  • Cut off a marked piece of pipe.

When putting the template either of two short sides of this triangle must be parallel to the central axis of the pipe.

When it is necessary to make a cut at an angle of 90 degrees, pipes are simply wrapped around the circle (cylindrical) or around the perimeter (profiled) with a sheet of paper. After that mark the line for the cut trimmer. It is also very easy to mark a profile pipe using a standard angle piece.

If it is necessary to cut at an angle of 45 and 90 degrees a considerable quantity of profile pipes make corresponding templates from the same material, only of a larger section. This allows the required measurements to be made only once. Herewith building angle or protractor are used for initial marking. When the template is made, the pieces to be cut are inserted inside it, marking the cut lines. Then the sawing is done.

Templates are also made for other corner dimensions. this way increases the efficiency of work.

Features of cutting cast iron and thin-walled pipes

Cast iron is a fragile material. To saw a cast iron pipe with an angle grinder, act in this sequence:

  • Mark the line for the trimmer cut;
  • Place a wooden block under the pipe which will support it;
  • make a kerf on the contour to a depth of a few millimeters;
  • insert a chisel into the hole;
  • the chisel is struck with a hammer hard and sharp.

After impact, the pipe will split along the kerf line. Its edges will be sufficiently flat. If necessary, they are further processed.

To make a longitudinal sawing of a pipe, it is also important to accurately mark the pipe. Various devices are used for marking, for example, a construction thread (“chisel”). The whole process of sawing should be done accurately, slowly, so as not to lose the marked line.

Thin-walled pipes are one of the varieties of this type of product. They are often made of nonferrous metals such as copper or aluminum. Cutting them is difficult. Use grinding wheels suitable for the workpiece material.

Sawing thin-walled tubes must be done very carefully, because they can easily deform even when a light load is applied.

To reduce the likelihood of bending the cut part, she poured inside a variety of loose fillers, such as ordinary purified sand.