How to cut a circle from plywood with a cutter
The master cuts perfect circles with the jigsaw. How to cut a straight circle with only a circular saw How to cut a straight circle out of plywood
Any construction, 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 the choice of the right tool and technology directly depends on the labor intensity of the process of performing the work and the quality of its result.
Metal can be thin, or thick and strong, so for its cutting a variety of tools are used.
The choice of materials and cutting techniques also depends on how big a circle is needed and how smooth it should be.
Using a jigsaw
If there is a need for a perfectly flat circle, you can use an electric one to cut it out.
- First the thickness of metal is determined and the appropriate saw blade for the electric jigsaw is selected.
- Before you cut a circle in the metal with a jigsaw, the contour of the circle to be cut out is outlined on the working plane.
- Using a drill and drill bit (with a diameter of eight to ten millimeters) to cut a hole, which will begin the work.
- In the obtained slot is placed a saw blade of the jigsaw and the cutting continues along the planned.
Cutting with this tool does not take much time and effort. over, with a jigsaw, you can get a circle with perfect edges. But this tool is only used to work with a minimum or medium thickness metal (eg 2. 3 mm).
Using an angle grinder
The angle grinder is used when working with metal of small thicknesses. To form a round hole with this tool, you can follow 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, the disc of the angle grinder cuts short sections, which will eventually join.
- The shape will look more like a polyhedron than a circle. Therefore, when the cut is complete, the workpiece is machined and deburred until the edges are sufficiently flat and smooth. You can also use an angle grinder for machining. If the circle is wide. You can grind the contours with a large disc.
Editing the cut circle with the angle grinder, be careful to keep the disk inside the hole and, at the same time, be in the same plane with the worksheet.
How to cut plywood with a jigsaw?
Before you cut a circle out of plywood, you should remember a few general tips for working with this material. Sawing can only be done on dry material. Wet plywood has an increased resistance, and when sawing the veneer will begin to flake, leading to damage to the saw, or even the entire tool in the case of electric models. At the first sign that the teeth are not sharp enough or any part of the blade is warped, the saw should be replaced.
When sawing plywood with the jigsaw, if possible place the main cutting lines along the fibers of the veneer.
This will contribute to clean cut edges. When working with a hand jigsaw is easier to cut across the fibers. This will not prevent chipping, but it will be less likely that the saw will get jammed or move away from the outlined line by the chipping.
Before a circle can be cut, its contours must be transferred to the plywood. Care should be taken to ensure that areas with defects, chips, stains, and knots fall outside of the cut out outline. It is possible to transfer the outline on plywood by tracing it through a tracing paper, by cutting out a paper outline for tracing or just by drawing a circle of necessary radius with a compass. If necessary, the starting hole in the plywood is made with a fine drill.
To cut a circle with the jigsaw, a blade is inserted into the hole. The free end of the hand model is again fixed in its place with a clamp or fixing screw. Workpiece to the workbench is clamped by clamps, the cut is made according to the transferred line. When the circle is closed, the central element is detached from the sheet and the edges are worked on with sandpaper or a file.
Before you cut with a motorized jigsaw, you need to install a narrow saw on it. There is a special improvement for this tool, called the circular cutter, it is set in the center and start work. When working, the tool should not be pressed, it does not contribute to faster running. Pressure can bend and break the jigsaw blade and even its mounts. If the circle to be sawed has a small radius, it is better to perform the work in several steps, as steep turns can break and bend the blade.
Often, when repairing or assembling various wooden products is required to drill a perfectly round hole. In this article we will try to highlight all the ways in which you can cut such a hole. Variants with and without special tools will be considered.
A hacksaw with a very narrow blade, a jigsaw, a hole saw and a circular file are the hand tools you can use to cut through curves.
It is the narrow blade that gives the hacksaw its maneuverability, but for the same reason it is extremely difficult to drive. It is necessary to have a steady hand and an attentive eye to avoid deviations from the marking. Do not work too fast. On the contrary, it is better to move forward in small increments. This will help you to hold the handle of the saw with more confidence and guide it exactly along the set line.
It is better to saw small round or oval holes and “narrow” curves with special tools. a circular saw and a circular file with which you can also deburr roundings.
But the most suitable tool for sawing rounded details and holes is an electric saw. Its advantage not only in terms of time and effort savings. The included set of replaceable blades with different teeth allows you to pick up a blade for sawing almost any type of workpiece, whether it’s wood, plywood or chipboard. In other words, the electric hacksaw can be rightly called a universal tool.
With what to make a round hole in a particle board?
I have a couple of loudspeakers to make, but I have not learned how to saw straight with a jigsaw. The Fiolent is stable in that respect, too. How is it possible to make a hole for the speaker with a diameter of about centimeters? With a jigsaw with a circular jig!
That’s just do not know whether there is such a device to the Chinese. With a cutter, with a similar device if you have a router. Well actually the jigsaw is the easiest. Only take a new saw and without a strong feed to cut. If you have a milling machine, you can use it. It comes with a special lever for circular cuts. And take a small finger cutter. You mill halfway on one side, then the other. There are also special circular cutters for drills.
For 25 cm is enough. But you need a good support for the drill, preferably a stand. Again, if the chipboard is wide, there may not be enough depth of cutter. Then you can try on both sides. And actually to make a good speaker is a great skill, in t.
I meant what you said. “and I have not learned how to saw straight with a jigsaw”. Making for myself, so any will be good. No router. Where to find them, approximate cost. Such circulars are called “Large Diameter Hole Cutter,” or large diameter drill jig. In short, it is a special sleeve with a shank under the drill and a cone for alignment.
There’s a through hole in the sleeve across, where you put a long rod. At the end of the rod there is a rectangular hole for the chisel with a screw to tighten it. Diameter of the hole is adjusted by the position of the rod in the sleeve. You set it right and fix the rod in the sleeve with a clamping bolt.
And then you drill. We have seen such devices repeatedly in construction markets. That’s where you need to look. This is not a do-it-yourself machine, someone is making one on an industrial scale. If you want to make a neat recess for recessing the flange of the heads, that is correct, and for tweeter it’s even mandatory. It’s probably only with a router. As for the front panel, take the right advice Nickel. Also, in the body itself does not interfere with the spacer.Cycles. Especially if it is large, and the walls are thin, and a coating of vibration and sound absorbers Made this.
To make the process of sawing was simple and fast, you need to follow the basic key rules of work:
To make the edges of the plywood even, it is better to saw along the blade.
- You can only work with dry material, as moisture increases the resistance of the material, as a result of which the veneer can begin to delaminate;
- It is necessary to change the cutting blade as soon as the first signs of blunting of the teeth appear;
- it is better to work with the jigsaw along the fibers of the material, so the edges will be more even;
- the jigsaw should cut across the grain of the veneer.
To work safely, it is necessary to adhere to the following recommendations:
- firmly fasten the sawing table and saw blade in the frame;
- The jigsaw should have serviceable and well set handles;
- do not push the jigsaw too hard, trying to “help” it, this will only lead to an acceleration of blunting of the working blade;
- Long, straight cuts are best made with a wide blade to make it easier to saw;
- it is necessary always to see the marking, that is why the sawdust from the material to be sawed should be removed by hand, not to blow it away in any case, because it can get in the eyes.
Following these simple rules will help a beginner learn how to cut circles with a jigsaw and make his work easier.
Homemade device for extending the capabilities of the router
The tool will be enriched with new possibilities, thanks to the following uncomplicated device. The basis of it will be a narrow and long piece of fiberboard. And its width should be equal to the width of the machine’s soleplate. The outline of the sole is transferred to the end of this piece, and holes are drilled for fastening. These holes must be countersunk, so that the screw heads do not protrude beyond the surface. This will not scratch the original workpiece.
Then the hand router is placed with the sole plate upwards, and the screws are used to fasten the strip of fiberboard to it.
Having secured the Fibreboard to the sole, the structure is placed on some thick wooden support and a hole is made with the router, which will then allow it to do the basic work.
As a result, a handheld milling machine with a home-made device will look like this:
You want to learn how to perform the basic techniques of cutting with a hand router? Click here!
Make or buy, what is better
Buy special devices or make their own every master decides for himself. In some cases, it is possible to make tooling without spending money on its purchase. This is especially true for a one-time job.
Also, the need for a homemade attachment can arise when it is simply impossible to buy it in the store. After all, manufacturers can not take into account all the possibilities of working with a router. In this case, the only option is to make the necessary fixture yourself.
And sometimes it is easier to buy a suitable device for a hand router on wood, than to do with their own hands. After all, the time spent on its manufacture, can be used more rationally.
Accessories for such a tool as a milling machine is a must, they help to extend the functionality of the tool significantly. You can make them yourself, if there is a need. The main thing is to take into account peculiarities of construction and to observe details fastening.
Cutting a straight circle in plywood without special tools
Hello all, dear friends. This is rather my last article here, I think will be of interest to many. I have faced this problem: I had to make a straight circle in plywood for the speakers, but I had no tools for this. The device is very simple, everyone can make it, and it is very easy to use.
For this “apparatus” we will need:
One screw you screw in the middle of the board or a little closer to the edge, as will be convenient
Then we measure the required diameter, measure and mark it on the board, screw in the second screw
Now the central self-tapping screw through into the plywood, and the second screw out a little so that its “sting” stick out a little from the board
DIY Community Blog A diary for a wood router
The routing cutter I wanted for a long time, although I’m not a carpenter, but with wood have to work in the countryside in the country house, at home and in the car. If you want to achieve a perfect result in the work performed, the milling machine is an indispensable thing. So I got a milling machine and immediately found a job for it.
Ahead of me have an auto rearrangement in the car, and in addition to direct cuts, will have to cut round holes, jigsaws to cut as you try not exactly get, but I want neat results, so for the available router requires a compass, which included not been, rather was, but the convenience of working with him I doubted, and small diameters they cut is not realistic.
Doesn’t fit, so I need to make it myself. For the base I took aluminum with thickness of 3 mm, width 120 mm, length I chose on the basis of the maximum necessary diameter of the cut: 40 cm diameter was satisfactory for me. I bent the edge of the sheet at 90 degrees and drilled two holes to install the guides.
Guides were included with the cutter, and were installed on the pad of the parallel cutting.
Measuring milling cutter to the table, decided on the location of the groove for the mill, the groove width of 10mm.
I also chose where to install the centering pin, its role was performed by bolt M3, height 15mm, also threaded into the plate M3 and screwed in the threaded fixer, sawed off its head afterwards.
Basically I could stop here, because the minimum diameter of the cut hole is 58mm,
maximum 400mm. But I decided to add strength to the construction and to give support to the other ends of the guides. To do that I took an aluminum angle bar, gave him the necessary shape, drilled a couple of holes for the guides and a couple of holes for mounting to the pad, in a pad of countersunk holes and for ease of installation used wing-nuts.
Thus the complete cylinder can cut holes from 58mm to 320mm, and without additional accessories. Angle up to 400mm, for my needs it is enough. Now you only need to determine the location of the center of the cut out hole, drill a 3mm hole in the center, install the center pin in the hole and run the router, a few movements and the perfect circle is ready.
We hope that, thanks to the above information, the question of how to cut a figure out of plywood will not cause you difficulties. Of course, figure carving on sheet material requires a certain skill and accuracy, but with the right tools, special difficulties should not arise even for a beginner. In the video presented in this article you will find additional information on this topic (also learn how to make a box from plywood with your own hands).
Cutting round shapes out of wood, plywood or particle board used to be a problematic job. I bought a Bosch Pof 1200 AE. Of course, with such a machine you can do a lot of things, but I will stop for now on the circles, namely, the cutting of the hole for the speaker.
I got the idea for my work from this article. It tells you very simply how to make a circle on a speaker. Basically I did everything the same, but I made some changes and a little bit about those changes.
In my router there is a device for cutting circles, but it is only suitable for diameters of 21 cm, and in the case of speakers there are copies of 5 cm. So I made a special overlay for a quick hand. It is made up of two parts: 1 is the base part made of laminate; 2 is the spacer that holds the screw that sets the radius of the circle, it’s made of fiberboard. The overlay is cut with the expectation of a diameter of up to 23 cm.
Why do you need a plywood circle?
Before you start thinking about how to cut a circle in plywood with a jigsaw, I have a jigsaw
, you need to clearly understand what it’s for. Subsequently, the resulting billet may be used, as well as a plywood sheet with a hole of regular shape.
Where a round billet of plywood can come in handy:
- For making various crafts and templates for them;
- be used as a base for a wall clock;
- be used for subsequent shape cutting or decoupage;
- be the seat of a stool, the top of a kitchen table or a coffee table, etc.д.
- to create different souvenirs, e.g. caskets, etc.д.
Also cut a right circle out of plywood may be necessary for the subsequent use of the sheet with a hole:
- sink inserted into the worktop;
- to obtain a ceiling with a cutout for round light fixtures (spotlights or a single chandelier);
- for the production of furniture with decorative facades and other elements, etc.д.
Often, when repairing or assembling various wooden products, a perfectly round hole needs to be drilled. In this article, we will try to cover all the ways in which such a hole can be. We will consider options with the use of special tools, as well as without oi.
A hacksaw with a very narrow blade, a jigsaw, a boring saw and a circular file are the hand tools with which you can saw along a curve.
It is the narrow blade that gives the hacksaw its maneuverability, but for the same reason it is extremely difficult to drive. It is necessary to have a steady hand and an attentive eye not to allow deviations from the marking. Do not work too fast. On the contrary, it is better to go in small increments. This will help you hold the handle of the saw more securely and guide it precisely along the set line.
It is better to saw small round or oval holes and “narrow” curves with special tools. a boring saw and a circular file, which can also be used to deburr roundings.
However the most suitable tool for cutting out rounded details and holes is an electric saw. It not only has the advantage of saving time and effort. Included set of indexable blades with different teeth allows you to choose a blade for sawing almost any type of workpiece, be it wood, plywood or chipboard. In other words, an electric sabre saw can be rightly called a universal tool.
Basic rules of work
Using a milling machine allows you to get a wide variety of products, which other tools can not do or very difficult and long. But like any other machine, this machine requires careful and thoughtful handling. And above all, including for beginners, the key safety requirements are relevant. They are self-evident, but must be repeated.
- It is strictly forbidden to work under the influence of alcohol;
- It is better to postpone the work if you are not in good health, if you do not feel well or feel unwell, as well as if you have a strong nervous and mental tension;
- It is allowed to change and adjust the tool only when it is completely stopped and de-energized. exceptions are extremely rare and concern literally single cases;
- Before you start using the machine, you should assess whether all components are in good working order, whether the external and internal wires, housing, outlets, and grounding are intact;
- Only quality cutters and bearings should be used;
- the workplace must be kept dry, clean and well lit;
- No objects of any kind may be processed on the cutter if it is not level or on a rickety, unstable base;
- It is categorically forbidden to rush, as well as to show sluggishness. both lead to sometimes fatal consequences;
- if you hear any abnormal noises, sparks, a smell of burning or the like. immediately de-energize the unit;
- the machine must be connected only to a separate power supply, with suitable circuit breakers, easily accessible and in good condition;
- before working on a new model. even if you have solid milling experience. be sure to read the instructions and other accompanying documentation.
But that’s not all, of course. The basics of working with the router are aimed not only at the safety of these manipulations, but also at their efficiency. Because:
- All workpieces and working parts of the machine should always be secured and checked before starting work;
- Whenever possible, a full cut should be avoided as this would overload both the cutter and the motor;
- The RPM should be adapted to the material in use, the application and the basic technical constraints.
The cutter is always placed with the electric motor disconnected and the tool deenergized. Alignment is carried out according to the markings on the tool.
precise information is available in the tool’s documentation, which is no excuse. with today’s variety of milling tools it is impossible to describe them all. Important: Even if the technological task includes sawing at full depth, the work must be devided into several stages. That way not only is the motor not subjected to unjustified stress, but you can clearly control the process of manipulation.
Time standards for milling in each case may differ. They depend on the equipment, its accessories, qualification of executors, the volume of the task and so on. To refer to the rationing carried out some time in the past for general engineering work can only be averaged. adequate information can be obtained, again, only from the machine-specific data sheets.
How to cut a circle with a cutter in several ways
The problem of how to properly and beautifully cut a circle out of plywood, board or other similar material using a milling machine has always been acute. And quite often people by their ignorance did such work not quite right, which led to spoiling the material and a lot of frustration.
To cut a circle with a milling machine, it is necessary to take a little extra distance.
Today there are 2 simple and affordable ways to cut circles with a router. Let’s look at them in more detail. One of them will be based on the work with a special router, where the speakers are attached, and the other. on the work with any milling machine.
For such work, you will need a set of tools and materials. Purchase everything at once so you have it handy:
- electric jigsaw;
- an ordinary milling machine;
- Wide screwdriver or chisel;
- a small construction knife;
- an electric drill.
Now we can move on to the work. Given that in this case you will have to adjust everything yourself, it is important to make the necessary measurements and markings. First determine the diameter of the future hole. It must not be very different from the dimensions of the router. After that, on the material where the hole will be cut, make the contour of the future circle, for which you need to use the compass.
How to cut with a jigsaw from plywood?
Before you cut a circle out of plywood, you should remember some general tips for working with this material. Sawing should only be done on dry material. Wet plywood has an increased resistance and when sawing the veneer will start to flake that will lead to saw blade damage or even the whole tool in case of electric models. At the first sign that the teeth are not sharp enough or some part of the blade is bent, you should replace the saw.
When sawing plywood with an electric jigsaw, the main lines of the cut should be along the fibers of the veneer if possible.
This will contribute to clean cut edges. When working with a hand jigsaw it is easier to cut across the fiber. This will not prevent chips, but it is less likely to be caught or to move away from the intended line.
Before you cut a circle, you need to trace its contours onto the veneer. Try to ensure that areas with defects, chipping, stains, or knots are outside the boundaries of the outline to be milled. Transfer the contour on the plywood, you can trace it through copy paper, by cutting out a paper outline to trace, or just draw a circle of the desired radius with a compass. If necessary, the starting hole in the plywood is made with a thin drill bit.
To cut a circle with the jigsaw, the blade is inserted into the hole. The free end of the manual model is again fixed in its place with a clamp or fixing screw. The workpiece is clamped to the workbench, the cut is made according to the transferred line. When the circle is closed, the center piece is separated from the sheet and the edges are machined with emery paper or a file.
Before cutting with an electric motor jigsaw, a narrow saw blade must be set on the jigsaw. There is a special improvement for this tool, called a circular cutter, it is set in the center and start work. No pressure should be applied to the tool when working, it is not conducive to faster running. As a result of pressure can bend and break the jigsaw blade and even its mounts. If the circle to be sawed has a small radius, it is better to perform the work in several approaches, as steep turns can break and bend the blade.
Lovers of all kinds of needlework should definitely pay attention to such a kind of arts and crafts, like carving plywood. You can make all kinds of figures, patterns and other decorative elements with this method.
over, to master such a technique is quite simple, the only thing you need to get acquainted with its basic nuances, which we will do below.
Jigsawing plywood is much easier than wood carving, for example. Therefore, to achieve good results do not need years to master the skill. You just need to do the job carefully, adhering to the above recommendations.
An electric jigsaw is a well-known hand-held tool designed to cut patterns on various surfaces. In its importance it is as important as a drill or peorator.
Electric jigsaws are used for sawing in various materials (wood, metal, etc.).д.).
It can be used to make straight and curved openings in wood of any species and other unnatural materials, precise cuts of geometric shapes with a complex trajectory. To find out how to cut a circle with an electric jigsaw, the tips and recommendations listed here will help.
Electric or hand tools?
When determining the diameter of the future circle, you must consider the dimensions of the working cutter.
The most popular of all is the electric jigsaw. This tool allows you to cut not only circles, but also any other geometric shapes. The only disadvantage of it is the need to form additional grooves in the places of turns (corners), but when creating a circle it is invisible. it is very important to choose the right file, t.к. They come in 3 types: rips on the left, rips on the right, rips on 2 sides. Once the blade is picked up, cut a circle of any size.
The jigsaw is an ordinary hand-held jigsaw. Before you cut a circle out of plywood with this tool, you need to make sure that the workflow is accessible. The main difficulty is the limitation (usually up to 30 cm) due to the physical structure, t.е. it is not possible to work in deep places. When starting work not from the edge, but directly from the center, the file is tucked in the last place.
milling machine. Very convenient option, but requires a firm grip on the surface, for which a screw is screwed into the center of the circle. The circle is made of any diameter, and very quickly. Sometimes there is not enough working handle, so you have to do all kinds of improvised brackets, which can act as a channel, profile, bar, board and even a rope, but on a rigid coupling is much more convenient. This tool makes quite a wide hole, so before you start, you need to carefully measure the future construction.
It is necessary to choose only sharp nails, and the edges of the resulting billet are processed with coarse sandpaper.
Nails. A very popular method in those cases where the work must be done “yesterday” and the tools will not arrive soon. It is worth noting right away that the work in the end turns out rather rough, so it is used in the most extreme case. Only a hammer, 2 nails and a string are needed. One nail is hammered into the center of the hole, and the other is pulled on a rope for the required length (radius), after which a circle is carried out with a firm movement. Such circles with pressure are continued until the circle is finally cut out. At the very end, the nail is removed from the hole, turned over and gently hammered to achieve a neater seam.
Chisel and office knife. Here everything is much easier, because first you need to draw a circle with a compass (pencil), and then this circle is circled several times with a paper knife under pressure. The peculiarity of circling is the movement not of the knife, but of the plywood sheet, so as not to break the metal, and this action is repeated from 2 sides. Then, to the prepared seam is enclosed chisel and soft strokes brought to the opposite seam (2-3 strokes are usually enough). At the very end, a hammer whips out a circle, as in the version with nails.
Usually, in order to saw out of a piece of plywood or board an even circle, masters resort to all kinds of routers, use jigsaws manual or electric, and, at the worst, take a hacksaw. And meanwhile, with a simple device, it is also possible to cut a perfectly even circle with a circular saw. How to do it in practice, read and see in the detailed step-by-step instructions.
Before you cut a smooth circle with a circular saw, take care of the availability of the necessary materials. The latter you will need very little:
Take a meter and measure the depth, length, and width of the groove on the circular saw table. Based on these parameters, cut a bar from a piece of plywood of suitable thickness.
Insert the timber into the gutter and trim the edges if necessary. The bar should slide easily along the gutter without catching it.
Leave the block in the chute and put a square piece of plywood on top of it. Position it so that it does not interfere with the saw itself.
Use self-tapping screws to screw the plywood firmly into the square. When selecting fasteners, pay attention to their length. Do not screw in the self-tapping screws to damage the table surface.
Take a piece of plywood or a board from which you need to cut an even circle. Adjust it to the shape of the square. Place the plywood on top of the prepared construction and hammer a nail exactly in the middle. Do not hammer the nail all the way in. The plywood, from which the circle is to be hammered in, must be free to rotate, and the nail itself must be carefully taken out when the work is finished.
Rotating the square in a circle, cut off its corners, so you get an octagon.
While continuing to rotate the square further, cut off its sharp corners. At the end of the work carefully grind away the smallest irregularities. That way, without any extra effort, you will get a straight circle cut from the board with an ordinary circular saw.
With the saw, the tool must be set to the cut line. The guide is squeezed with the platform side. After that proceed to the sawing.
The tool is pushed forward smoothly and the platform is carefully controlled. The platform and guide must be close to each other so nothing moves. The sawed off part should be carefully held with a few centimeters left to the end. Then the piece will not break off.
Neither hand nor electric saw will help if you have to saw a small hole in the workpiece, less than 10 cm in diameter. The jigsaw can also be useless if the workpiece is large-sized. In this case the most suitable tool is a boring saw. With its tip it plunges into the wood like an auger and thus makes the “start” hole for the next cut. Outwardly the saw resembles a round file, the difference being that the cutting edge of the saw blade has a spiral cutting edge.
Drill saws are available with interchangeable nozzles of different diameter, designed to cut both soft and hard wood, as well as a variety of materials made of it.
The working organ of a hole saw is a metal rod with a cutting point like an auger, and a cutting edge that wraps around the rod in a spiral.
This is what the narrowest of handheld hacksaws looks like. Thanks to the attachment node, the blades in the hacksaw can be changed depending on the nature of the material being worked.
Nozzle for the drill
One of the most popular and convenient ways to cut a hole is with a special drill bit. It is made in the form of a crown ridge and has a rounded shape. With this attachment, the holes are cut quickly and are quite even.
The nozzles come in different diameters, which allows you to cut a hole of the desired diameter. If you have already prepared the hole, you might want to try your hand at trading.
It is also possible to cut a large hole with a drill bit. To do this, it is necessary to mark the contour of the hole to be drilled in advance. Next, with a small drill bit drill through holes on the contour, prepared in advance. Next, with a jigsaw or a very sharp knife, cut the wells, thereby connecting the holes. Then you can smooth out the circumference with a burr of varying grit size.
You can also use a chisel to cut the necessary hole. It is enough to remove the wood layer by layer on the contour. This option is the least suitable for interior decoration. The hole must be flat, which cannot be achieved by using improvised and unadapted materials. The best option would be to use a drill bit. The hole is obtained even and with smooth edges.
Thus, summarizing, it is clear that you need to choose a tool for cutting a hole, based on your goals. If a quality cut is required, a special tool is indispensable.