Devices for a manual router: what you can do with your own hands or buy. The master cuts perfect circles with a jigsaw Device for sawing a circle out of wood

Often, when repairing or installing various wooden products You need to drill a perfectly round hole. In this article we will try to highlight all the ways in which such a hole can be cut. Options will be considered with the use of special tools, as well as without them.

How to cut plywood

A hacksaw with a very narrow blade, a jigsaw, a drill saw and a round file are those hand tools, which can be cut along a curve.

It is the narrow blade that provides the hacksaw with maneuverability, but for the same reason it is extremely difficult to guide. It is necessary to have a firm hand and an attentive eye in order to prevent deviations from the markup. At the same time, do not try to work quickly. On the contrary, it is better to advance in small jerks. This will help you more confidently hold the handle of the saw and guide it exactly along the given line.

Saw small round or oval holes and "narrow" curves are better with the help of special tools - a drill saw and a round file, which can also be used to clean rounding.

However, the most suitable tool for cutting rounded parts and holes is to recognize an electric saw. Its advantage is not only that it saves time and effort. The included set of interchangeable blades with different teeth allows you to choose a blade for sawing almost any type of workpiece, whether it is wood, plywood or chipboard. In other words, the electric saw can rightfully be called a universal tool.

Round corners of furniture

blow on sharp corner tables can even get hurt. Therefore, we recommend cutting corners where possible. At homemade furniture they need to be rounded off from the beginning.

Cutting circles and curved lines is no more difficult than making a completely straight cut on a workpiece, but on one condition: you have right tool and you are good at it.

Mark drop-down parts

It may happen that the holes that you drilled to insert a narrow blade of a manual or electric saw will be in useful areas. To avoid such errors, you should mark all the drop-out parts of the workpiece with hatching.

What is suitable for the template

You can make a circle on the workpiece not only with a compass. For this purpose, any object of a similar shape will do. It can be a saucepan, a plate, a cup or a bowl. However, when undertaking work related to the repair of furniture or some piece of furniture, calculate in advance the need for details of rounded contours or with round holes. It may be sufficient to make only minor changes to the design.

Instead of a compass

A school compass can also be useful in a home workshop, but its radius of action is small. And if you need to draw a circle of large diameter?

An easy way is to do it with string, a nail and a pencil. The nail is carefully driven into the workpiece, the rope is fixed on it at one end, and the pin is fixed at the other end. The length of the rope determines the radius of the circle being drawn. The only condition is that the rope must be taut along the entire path of the pencil. Then the distance from the center (nail) to the circumference in all sections of the markup will be the same.

Strip of cardboard or slats

No less simple, but more reliable way- use a strip of cardboard instead of a rope or, even better, a wooden plank. Drill two holes in this bar (strip) - one, smaller, for a nail, the other, larger, for a pencil. The distance between their tips should correspond to the radius of the desired circle. It remains only to install a nail in the right place and turn the bar around the axis.

Two sharpened nails and a wooden plank or a strip of thick cardboard can replace the compass.

How to draw ellipses

An ellipse is a rather complicated shape, but to draw it on paper, you only need two buttons, a piece of string and a sharpened pencil.

Fix two buttons on the surface of the workpiece at a certain distance from each other. Take a piece of string, tie both ends in a knot and hook the string around the button heads. Now draw a line with a pencil that allows you to describe taut rope. You can change the shape of the ellipse as you wish.

The distance between the two focal points of the ellipse is indicated by buttons. If you lead a pencil within the boundaries allotted to it by a rope, then an ellipse outline will appear on paper.

The shape of the ellipse can be larger or smaller, thicker or narrower, depending on the distance between the buttons and the length of the rope.

Templates

Wine glasses, cups, plates, pots or baking dishes - in any household there are many round-shaped objects that can be used to mark a circle. If you are making something and decide to give your product a rounded shape, then first look to see if there is a suitable template among the household utensils. To be sure, select a few items and take them to the workshop. There you can immediately try them on the workpiece and determine what is most suitable. After some practice, you will be able to make rounded lines from several round objects with different radii. Arcs of a circle can be drawn sequentially, or you can draw bridges-transitions between individual arcs.

preliminary drawing

Before attempting to draw a curve on a workpiece, design it on a large piece of paper or piece of paper. corrugated cardboard. Only after a satisfactory result has been achieved in all positions, can you cut out a template from paper and mark it on the workpiece.

You can draw circles and fragments of a circle using a cup or plate, simply tracing them with a pencil.

Sink insert according to the template

Washing is one of essential elements kitchen equipment. If you decide to embed the sink into the countertop of the kitchen worktop yourself, then the first thing to do is to prepare an exact template.

First, transfer the outer contour of the sink onto a thick sheet of paper. Next, measure the width of its sides, with which it will rest on the countertop. Usually it is 2-3 cm. Now step back from the outline drawn on the paper, inward to the width of the rim and draw a parallel line. This will be the cutting line.

When marking, make sure that the position on the plate of the template itself is correct. Of course, if all the corners of the shell are symmetrical, then nothing terrible will happen if it turns out to be, according to the markup, as if in a mirror image. But if the shell is trapezoid and the roundings at the front corners are different from the roundings at the back, then in no case confuse the front and back.

In a similar pattern, make templates and cut holes for wall lights or for a speaker mounted on wooden panels.

The line drawn around the sink is auxiliary. The second, drawn parallel closer to the center, is the sawing line.

electric hacksaw

If you need to cut a rounded part and saw through a round hole in the workpiece, then an electric saw is the most suitable tool. With its help, you will save time and effort, since such a saw has great advantages over a manual one. So, the blade of the electric cutter is narrower, which provides increased maneuverability. Further, it has interchangeable blades with different teeth, which allows you to process workpieces of any type, that is, wood, plywood, chipboard (it is no coincidence that the tool is also called a jigsaw).

To cut a section inside the workpiece, a hole is first drilled for a hand saw. But if you have an electric saw, then this is not necessary. The tool is brought to the workpiece with a slight forward inclination and is turned on in this position. The saw cuts the hole itself. Just do not put too much pressure on the body - this can lead to breakage of the saw blade.

Lead in a circle

This device, simple in design, makes it much easier to cut round holes or arcs. It is enough to mark the center of the circle on the workpiece, fix the fixture at the mark and connect the rod coming from it with the electric saw. The divisions on the rod help to set the saw blade at the distance from the center of the circle, which is necessary. As a result, without preliminary marking, you can cut a circle or saw through an arc with a radius of 5 to 20 cm.

The device (more precisely, its “sole”) is attached to the surface of the workpiece with screws. They must be well tightened. If the mount is not rigid, starts to hang out, then an even circle will not work.

Suitable for lefties too

Left-handers can also use the device, since the guide rod is attached to the movable unit both on the left and on the right. So saw at your own discretion - clockwise or counterclockwise.

Using such a device, it is possible to cut a round hole in the workpiece with a diameter of 10 to 40 cm without preliminary marking.

jigsaw

When cutting holes or curves in small workpieces, sometimes a jigsaw is indispensable. Interchangeable blades with teeth of different shape and arrangement allow you to work with wood of various densities. However, it should be borne in mind that the depth of cut is limited by the arc of the jigsaw, that is, the saw blade will not be able to move further than 30 cm from the edge of the workpiece.

Very thin, narrow saw blades can be easily damaged if the jigsaw is not used correctly. It is necessary to drive the saw with neat, methodical movements. The main thing is to prevent the canvas from skewing. Otherwise, small and light workpieces will begin to move with the saw, which may eventually cause the blade to burst.

The thinnest jigsaw blade will “master” the narrowest curve, but only in small workpieces, since the advancement of the blade is limited by the jigsaw arc.

Boring saw

Neither a manual nor an electric saw will help if you need to cut a small hole in the workpiece - less than 10 cm in diameter. A jigsaw can also be useless if the workpiece is large. In this case, the most suitable tool is a drill saw. With its tip, it bites into a tree like a drill and thus makes a “starting” hole for further cutting. Outwardly, the saw is similar to a round file, with the difference that its core goes around the cutting edge in a spiral.

Drill saws are available with interchangeable nozzles different diameters, designed for processing both softwood and hardwood, as well as a variety of materials from it.

The working body of a drill saw is a metal rod with a cutting edge, like a gimlet, and cutting edge, which goes around the rod in a spiral.

This is what the narrowest of hand saws looks like. Thanks to the fastening unit, the blades in the hacksaw can be changed depending on the nature of the material being processed.

Drill nozzle

One of the most popular and convenient options hole cutting is a special nozzle on the drill. It is made in the form of a crown crest and has a rounded shape. With this nozzle, holes are cut quickly and they are quite even.

hole drill bit

Nozzles come in different diameters, which allows you to cut a hole of the required diameter. If you have already prepared a hole, we can advise you to try yourself in options trading.

Drill

To cut big hole You can also use a drill. To do this, it is necessary to pre-mark the contour of the drilled hole. Next, with a small drill, drill along the contour prepared in advance, through holes. Next, with a jigsaw or a very sharp knife, we cut off the holes, thereby connecting the holes. After that, you can smooth the circle with the help of skins of various grain sizes.

Chisel

To cut required hole you can also use a chisel. It is enough to remove the wood along the contour layer by layer. This option is the least suitable for interior design. The hole must be even, which cannot be achieved using improvised and unsuitable materials. The best option will be the application of the crown on the drill. The hole is smooth and has smooth edges.

Thus, summing up, it becomes clear that you need to choose a tool for cutting a hole based on your goals. If you need a high-quality cut, then without special tool not enough.

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

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:

Bench tool properties

The jigsaw is intended for household and professional needs. Devices of the first type are characterized by low power and are designed for work in small volumes. The purpose of using special equipment is the professional orientation of the tool, its productivity and a long period of work.

Usually Appliances have a standard set of functions:

frequency of moves;
method of fixing the sheet for cutting;
pendulum type movement;
saw rotation.

The electric jigsaw is used for finishing surfaces, sawing out uneven edging, holes in the internal position, and making furniture. The processed material is reliably fixed on the basis. Marks are made on it in advance, then holes are sawn. The rotational vibrations of the shaft are converted into translational movements. The saw is fixed on the rod, its quality determines the period of use of the product. When choosing a device, preference should be given to round shapes and thickened stems.

The jigsaw is different positive qualities, How:

Cutting holes in any samples.
A simple device allows for quick replacement of saws.
Possibility to make round or rectangular cuts.
Ease of use.
Does not require special knowledge and skills.
The presence of a significant number of saws with different step limits of action, tooth shapes makes it possible to carry out various types of work in the conditions of one device.
Reliable fixation of the sawn sample allows any distance from the edge of the product.
device universal action allows you to cut to any depth.
At the time of work, the material is practically not damaged.

Drawbacks:

The shortened movement of the web provides a slowdown in the operation of the device.
Possibility of injury.
Probability of cable failure.
Perform a battery level check.

The jigsaw has a built-in protection system, pneumatics and an electric drive.

Released new items are equipped with advanced features: reducing the number of vibrations, improving work productivity, equipping the device with convenient functions. Depending on the method of fixing the cutting part, saws are:

with holes;

with a cruciform element;

with a smooth base.

A jigsaw in some way can replace a milling cutter, a hand saw, a circular saw, chain saw, angle grinder. The tool is necessary in any household, it allows you to carve wood.

The current supplied to the device from the network gives an impulse to the engine, setting it in motion. Together with the gearbox, it transmits momentum to the gear, which secures the stem. The circular action of the shaft is modified into the movement of the working element of a reciprocating nature, moving up and down. Saws are fixed with screws or clamping mechanisms. Such fasteners help to change canvases in a short time.

Back to index

Rules for working with an electric jigsaw

To understand how to properly cut a circle in wood, it is important to study the features. This carpentry tool helps to cut ovals, wavy patterns, figures with uneven outlines, non-standard carved caskets, shelves with patterns of a through plan. In order for the interaction with the jigsaw to be organized and safe, it is important to adhere to the rules:

In order for the work with the jigsaw to be quick and safe, do not forget to fix the product before work.

To avoid inconvenience, special stands should be prepared during work. A slot is made to the middle of the support, somewhat resembling a lock hole.

The stand is fixed with clamps or screws to the workbench.

At the time of work, you need to sit down, place the file strictly vertically relative to the floor and perpendicular to the surface.

The workpiece is placed in the middle of the stand, holding it with your left hand, you can cut plywood with your right hand. The location of the cuts should be in the middle of the support hole.

The tool does not tolerate strong pressure: just a little touch and a gradual movement up and down, and it will begin to work effectively.

Attributes:

pencil;

drill;

drill;

jigsaw.

Plywood, unlike other sheet materials, due to its dense and not loose structure, lends itself to easy sawing and obtaining various decorative complex shapes. With a standard set of tools, anyone House master is able to cut any desired, and even complex elements. However, in order for the blanks to have a presentation and not violate the intended decor element, you need to take into account some of the nuances of working with plywood. How to cut an even circle from plywood?

Many saw parts out of plywood more than once, but mostly they had to make straight cut lines. It is not often necessary to cut out rounded or wavy details, few people dared to make a circle out of plywood. Therefore, this task at first glance may seem impossible. For curly sawing, you will need the following tools:

The jigsaw is normal. A tool often used for do-it-yourself cutting of thin sheet materials. However, thick thicknesses are beyond his power;
Electric jigsaw. Such a power tool is divided into two types of devices: the usual one, in which the file is located vertically, and for artwork, in which the working element is a steel sheet, as seen in the photo. An ordinary electric jigsaw is suitable for working with thick plywood, but it will not work to make an even circle of plywood with it. But curvilinear elements, such as letters, can cut out an artistic jigsaw, which is equipped with band saw. So for quality performance different kind works, the appropriate device is selected.
With more sophisticated equipment, such as a router, a circle of plywood can be cut very evenly. Of course, it is more difficult to manage it, but with it you can cut off a circle of plywood from sheets with a sufficiently large thickness. The quality of work on such a machine is superior to other cutting methods, and the cut of the circle is even.

Patterns of drawings should be located on the sheet of the workpiece so that the places with damage and flaws then fall into the waste, and the clean areas are under the drawing, that is, they later become the finished product;
Before cutting a circle out of plywood with a jigsaw, you need to make sure that the material is completely dry. Since moisture increases the resistance of plywood, and as a result, either the veneer can delaminate or the tool breaks;
In order for the cut edges to be without nicks and burrs, it is necessary to cut with an electric jigsaw along the veneer fibers. Hand jigsaw on the contrary, it is necessary to cut across the veneer fibers, although chips may form, but there is no risk that the file will deviate from the cut line;
As soon as it became noticeable that the cutting teeth became dull, it is immediately necessary to change the working blade or saw.

Curly sawing methods

Getting started with sawing with a jigsaw, a sketch of the drawing is first applied to the sheet using carbon paper. The drill drills the original holes. A file or a working element of a jigsaw is inserted into it and the free edge of the file is fixed with a clamp or screw. Next, sawing is performed according to the template transferred to the plywood. Then they are removed necessary elements, and the workpiece is sanded along the edges sandpaper, or processed with a file. The video shows this process.

A furniture router is not suitable for cutting complex shapes, but cutting a plywood circle evenly is very simple. In the center of the circle, the standard ruler of this machine is fixed with a self-tapping screw. When the cutter begins to rotate along a given radius, a completely even circle is cut out. To correctly calculate the diameter of the circle, it is necessary to take into account the dimensions of the cutting cutter. You can correctly navigate this issue by first studying the instructions for the equipment.

How to make figured blanks using various tools and machines is described above, and if there was nothing at hand, how to cut a circle out of plywood without a jigsaw.

Here the simplest technology cutting a circle out of a plywood board with a few simple items:

A wooden plank and two nails are taken. The first nail is driven into the center of the planned circle through the bar. The second nail is driven into the plank so that its sharp edge extends five or ten millimeters beyond the plank;
The distance between the fixed nails will be the radius for the required circle;
Making rotational movements, a line is made on plywood. By wrapping the bar many times, the furrow is made deeper and deeper.
The sharper the nail is chosen, the sooner the drawn line will receive a recess;
The bar is easily replaced with a cord, the following cutting steps remain unchanged.

The above method is one of the most ineffective, but also has the right to exist. And if you have an electric jigsaw, cutting a circle with your own hands will not be difficult.