Usually, in order to cut an even circle from a piece of plywood or board, craftsmen resort to different kind routers, use manual or electric jigsaws, and, at worst, take up a hacksaw. Meanwhile, with a simple fixture You can cut a completely even circle with a circular saw. How to put it into practice, read and see the detailed step-by-step instructions.

materials

Before you cut an even circle with a circular saw, make sure you have the right materials. You will need quite a few of the latter:

• a piece of plywood;
• meter;
• the circular saw itself;
• nails or screws.

Step 1. Take a meter and measure the depth, length and width of the gutter on the working part of the table circular saw. Based on the parameters obtained, cut a block of suitable thickness from a piece of plywood.

Step 2. Insert the timber into the gutter and adjust the edges if necessary. The timber should slide easily along the gutter without catching it.

Step 3. Leaving the block in the gutter, place a square piece of plywood on top of it. Install it so that it does not interfere with the operation of the saw itself.

Step 4. Fasten the plywood firmly to the bar with self-tapping screws. When choosing fasteners, pay attention to their length. Self-tapping screws must not damage the surface of the desktop when screwing in.

Step 5. Take a piece of plywood or board from which you need to cut an even circle. Fit it into a square shape. Install plywood over the prepared structure and drive a nail exactly in the middle. Don't drive the nail all the way in. The plywood from which the circle is to be cut should rotate freely, and the nail itself will need to be carefully removed upon completion of the work.

Step 6. Rotating the square in a circle, cut off its corners so that you get an octagon.

Step 7. Continuing to rotate the square further, cut it sharp corners. At the end of the work, carefully sand the slightest bumps. Yes, without extra effort you will get an even circle cut out of the board with a regular circular saw.

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?

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

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 needed and how even it should be.

Jigsaw application

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

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 to be cut is outlined on the working plane.
• With the help of 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 slot and cutting continues as planned.

Cutting with 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 minimum or medium thickness (for example, 2 - 3 mm).

The use of grinders

The grinder is used in working with metal of small thickness. You can form a round hole with this tool by following these step-by-step tips:

• Before cutting a circle in metal with a grinder, marking is carried out so that its contours are clearly visible.
• Along the entire length of the intended drawing, short segments are cut through the angle grinder disk, which will eventually connect.
• 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 are sufficiently even and smooth. For processing, you can also use the grinder. If the circle is wide, you can grind the contours with a large disk.

When processing a cut circle with 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

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, with the help, the required width of the compass slot is set so that it corresponds to the required diameter of the circle.

Then on a metal plane is determined central point circle.

Contours are drawn from it with the help of a compass.

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

Cutting torch application

A circle in metal of medium thickness can be cut with a gas cutter. The work takes place in several stages:

• The contour of the circle is outlined.
• The tool burner ignites.
• Burning flame is adjustable.
• Gently and slowly, the torch is carried out according to the drawn drawing.

With this method, you can cut a hole in the metal, which has about four or five millimeters.

Welding Machine Application

If there is no gas cutter in your home arsenal, you can use a welding machine.

It needs to be adjusted to high level current.

Then a burning arc is substituted for the contour and held on it until a hole is formed.

Then you just need to slowly lead 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 is used with a thickness of about four millimeters, a device operating at a power of about 150 amperes is needed. If the metal is thicker, the power of the tool will be greater.

To speed up the 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 it will have time to cool down during the replacement of the electrode.

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

A jigsaw is a very useful power tool. With the right file, a little experience and confidence, and most importantly, proper body position, you can do anything with it. You can do a lot of things that you can't do with other instruments. The machine is used for cutting straight lines, curves, profiles and cutting circle. Great for cutting wood, metal and plastic.

The master showed how to cut a perfect circle with a jigsaw. He made a device out of wood. Its design is unpretentious, and the device itself is easy to manufacture. To get an idea of ​​this, see this image.

Material used:

12 mm plywood sheet. Wooden strip. Nails.

How to do

First of all, measure the size of the jigsaw base plate. The next step is to cut plywood sheet in the shape of L, as shown in the image.

After cutting the plywood sheet into exact size the next step is to cut a wooden strip to attach this sheet with nails. This strip is used to hold the jigsaw in its position.

Make sure that there should not be any type of opening between the strip and the base plate of the jigsaw.

The next step is to drill small holes in the sheet. The distance between these holes is, for example, 10 cm. These holes are used for cutting different diameter circle.

After that I drew it so that it looks good. Now it's ready to be used for cutting perfect circle clamp.

Advantages:

This is very easy to do.

Easy to use.

Less cost.

Used for cutting round discs of various diameters.

For a better understanding, watch the video below.

Often the question of how to cut even circles from plywood with a jigsaw confuses novice craftsmen. After all, it is much more difficult to do this than a simple straight cut, no saw will help here.

Most often, a jigsaw helps to cope with the task of figured cutting. Jigsaws are manual and electric. A manual jigsaw consists of a frame with clips for the blade and a handle. Main disadvantages manual jigsaw: low mechanical strength canvases and small size framework. As a result, the blade is often torn and it is impossible to cut at a large indent from the edges of the part. Such jigsaws are usually used for processing wooden products. Jigsaws are ordinary, in which the saw is located vertically, and for artistic cutting, where the cutting element is a steel sheet. Electric jigsaws usually used when working with thick material.

Key Rules

To make the sawing process simple and fast, you must follow the basic key rules of work:

In order for the edges of the plywood to be even, it is better to cut along the canvas.

• you can only work with dry material, as moisture increases the resistance of the material, as a result of which the veneer may begin to delaminate;
• it is necessary to change the cutting blade immediately after the first signs of blunting of the teeth appear;
• it is better to work with an electric jigsaw along the fibers of the material, so the edges will be more even;
• with a hand jigsaw it is necessary to cut across the fibers of the veneer.

To work safely, you must adhere to the following recommendations:

• firmly fasten the sawing table and saw blade in the frame;
• the jigsaw must be with serviceable and well-fitted handles;
• you should not press too hard on the jigsaw, trying to "help" it, this will only lead to faster blunting of the working blade;
• straight and long cuts are best done with a wide blade, so the sawing process will go faster;
• it is necessary to always see the markings, so the sawdust from the material being cut must be removed by hand, in no case should it be blown off, as they can get into the eyes.

Compliance with these simple rules will help a beginner learn how to cut circles with a jigsaw and facilitate his work.

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Cutting instructions

Before starting work, you need to drill a hole in the plywood for the jigsaw blade.

To cut even circles with a jigsaw quickly and beautifully, it is not necessary to be an expert in this field, but for a beginner it can be a very difficult task. In this case, the main thing is patience and, of course, the availability of the necessary accompanying tools, such as the jigsaw itself, a file, compasses, a simple pencil and surface polishing devices.

The first thing to do is to draw a circle on the surface of the material you will be working with. It is best to use a compass or choose a suitable circle and circle. It is necessary to trace with a pencil so that traces of it can be erased in the future.

If it is necessary to cut a circle inside the surface, then a through starting hole should be made. Next, you need to insert a jigsaw blade or file into this hole and fix the free end of the file with a clamp. Cutting is recommended in a sitting position. First of all, you need to fix the file in the jigsaw with a key, while keeping in mind that the teeth of the file should be pointing down. It is necessary to cut in the direction from top to bottom. The tool should be held level to avoid nicks and bevels.

The main thing in this process is not to rush and cut smoothly without sudden movements.

In the process of sawing, it is necessary to take small breaks, as the file can overheat and break. Here is the circle and ready. Now it is recommended to align the edges with a file, erase the markings left by the pencil and polish the part. Can be varnished if necessary.

Of course, it requires some skill and skills, but everything comes with experience. Therefore, following the recommendations described above should help the novice master in mastering this interesting and exciting activity.

• Date: 25-08-2015
• Views: 661
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• Rating: 41

Electric jigsaw - popular hand tool used for pattern cutting. The jigsaw, along with the hammer drill and the electric drill, is considered the most essential tool to work with wood. A jigsaw is used to make straight and curved cuts in tree species different hardness, other natural and artificial materials. The tool can be used to cut a circle, rectangular cuts along a complex path, high-precision cuts. To reveal the question of how to work with a jigsaw, how to cut a circle, the principle of operation, the advantages, disadvantages of the tool, some tips and tricks will help.

Jigsaw is considered the best option for cutting circles of various diameters.

Tool Specifications

Jigsaws are divided into household and professional. With the help of household tools with a power of 350-620 W, they perform a small amount of work on wood up to 70-80 mm thick, sheet steel up to 4 mm thick. The professional power tool is designed for a large amount of work, provides continuous work for 8 hours, productivity does not decrease. The tool is designed to work with wood material thickness 80-130 mm, steel material up to 10 mm thick, aluminum up to 20 mm, has a power of 580-750 watts.

Household models have a smaller set additional features. Important working functions - stroke rate, power, saw blade attachment method, pendulum movement, saw blade turning device, stroke adjustment to optimize work with different materials. Single-speed jigsaws without stroke adjustment are used for sawing wood.

A jigsaw is often used when carrying out finishing works, for curved sawing, creating internal holes, figured parts in the manufacture of furniture, while the material with which they work needs to be fixed. Clamps can be used to fix the material, cuts are pre-marked on the material, then the tool is turned on and sawing begins. The principle of operation is to convert the rotational movement of the shaft into the translational movement of the working mechanism - the file. The file is fixed on a rod - a round plate, the quality of which determines the durability of the part. When choosing a power tool, you should pay attention to the round shape, thickened rods.

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Advantages and disadvantages

The universal tool has many advantages:

• capable of making cuts on almost any material: wood, stone, plastic, sheet steel, ceramic tiles;
• fast change of saw cloths is possible;
• used for sawing circles of various diameters, rectangular cutouts;
• easy to operate;
• to work with the tool there is no need to obtain the appropriate education, some simple skills are enough;
• wide range of saw blades with different steps, the shape of the teeth, used for processing all kinds of natural and artificial materials, contributes to the implementation of many types of work on one tool;
• thanks to the reliable fastening of the blade, cuts are made at any distance from the edge of the parts;
• sufficient depth of cut makes the tool versatile in use;
• rare damage to the canvases in the process.

Disadvantages:

• the slow process of the tool, due to the short stroke of the blade;
• the likelihood of injury;
• the possibility of damage to the cord in a power tool powered by cord power;
• control over the level of battery charge.

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Features of work

The tool is produced with built-in protection systems, pneumatic and electric drives. The introduction of innovative technologies helps to improve the functions of jigsaws, reduce vibrations, noise, increase productivity, and equip the tool with convenient functionality. Tools can be classified according to the method of attachment of the saw: saws with a hole detail, saws with a cruciform detail, smooth saws. A jigsaw can perform some of the functions of a router, hand saw, reciprocating, circular, chain saw, angle grinder; The tool is a good help in the household.

During the operation of the jigsaw, the current that comes from the power source drives the jigsaw motor. Through the motor and gearbox, rotational motion is transmitted to the gear that fixes the rod. rotational movement The shaft is transformed into a reciprocating movement of the working mechanism (up and down), the saw blade cuts through the material. The tool is indispensable for woodcarving. The blades are fastened with screws or clamping devices, this allows you to conveniently and quickly change the blade without using a special tool.