How to make a manual circular saw from a grinder. Reliable circular saw from a grinder with your own hands

Many different tasks can be solved with the help of a homemade circular grinder. Such a machine will indispensable assistant when repairing an apartment, in the manufacture of furniture and for many other men's affairs. You can buy a ready-made circular machine, or you can make it yourself.

You don't need to have any special skills to do this. It is enough to be able to use a hand tool and have the necessary minimum of materials. Before we talk about how to make a circular grinder, consider general design machine.

Do-it-yourself circular grinder: design

With all the variety of designs, any grinder from a grinder, made by hand or bought in a store, consists of the main parts:

• engine;
• Desktop;
• bed;
• disk;
• reducer.

As an engine for a homemade machine, you can use several available options. Typically, such recommendations suggest using asynchronous motors purchased specifically for the machine, a motor from washing machine, drill or grinder. Each of the options has its own advantages and disadvantages.

If you buy an engine specifically, then there is the possibility of choosing its parameters for your machine. This is where the advantages of this choice end and the disadvantages begin. The main disadvantage is the high cost of such a solution. Indeed, the engine is more expensive hand power tools. The cost of such a purchase is close to the cost of the finished machine.

The second option is the engine from the washing machine. This is done by those who have unnecessary equipment with a serviceable engine. Not every washing machine is suitable for a homemade machine. Many modern automatic machines have an engine that requires a special controller to control it.

Of course, you can build your own controller, but this will greatly complicate the work. Motors from old washing machines are easy to connect, moreover, often a pulley is already installed on their shaft. This greatly simplifies the work of creating a machine. The disadvantage of such engines is low power. The machine that can be made will turn out to be a model of the machine rather than a real working tool. However, for some tasks such a solution is also suitable.

Drill, as a homemade drive circular machine, has some advantages over the options already listed. The main advantage is the ability to abandon the gearbox.

As a rule, drills have low speed and high power. The saw blade can be driven directly by clamping its axis into the drill chuck. The disadvantage of such a scheme will be the need to take breaks in work. As a rule, drills are not designed for continuous operation and require a stop for 15 minutes every 5 to 10 minutes of operation. This problem can be partially solved by installing additional engine ventilation, but this will make the design of the machine much more complicated.

The use of an angle grinder, or in other words a grinder, is free from many well-known shortcomings. First of all, the grinder's engine has a high power. Many people have this tool, and if not, then buying it will be useful. The use of an angle grinder as a machine engine does not make it impossible to sometimes use it for its intended purpose. The integration of the grinder into the machine is simple.

Often there are special clamps included with the angle grinder, with which you can quickly fix it on the frame. A pulley is easily installed on the tool shaft, which drives the machine disk. Due to the high engine speed, it is well ventilated by the built-in cooling system and is able to work for a long time without interruption.

Making a circular saw from a grinder is not difficult. This does not require special knowledge and special skills. All you need to do is show a little creativity and do all the work carefully. Before you start making a machine, you need to weigh all the arguments and decide why exactly it is needed. It should be understood that despite the possibility of long-term continuous operation, due to the sometimes high loads that occur, the angle grinder can fail.

If you plan to open own production furniture or making wooden products in industrial volumes - best solution there will be a purchase of a finished machine. Homemade machine is suitable only for home use, as a tool for solving small everyday tasks at home, in the country or in the garage.

What will be needed?

Protozoa a circular saw from a grinder, made by hand, is a metal table with wooden surface and guides, on which the engine, disk and disk drive system are fixed. The bed or frame of this table must be made of a metal corner.

It must be strong enough. It doesn't have to be heavy. Stability during operation can be ensured using special fixing elements that secure the machine to the floor or other stable surface. The unit can be made without preliminary drawings. The main thing is to adhere to the recommendations written below and have a minimum builder skill.

The working surface of the machine is made of MDF or plywood. Plywood with a thickness of 9 or 12 mm is best suited. There are two options for a disk drive device.

The first and easiest is to put the disc in the regular place of the grinder. That is, just choose a disc that is suitable for use at high speeds. It should not be forgotten that conventional wood discs are designed for a lower speed. In addition, the diameter of the disc matters.

When sawing a tree, more high loads than with an abrasive disc.

In order not to overload the engine, you should choose a disc of a smaller diameter than the one that is usually installed on the grinder.

The second option is a little more complicated. If you use a belt drive, you can reduce the speed of rotation of the disk and increase the torque. In this case, it becomes possible creation complete machine. If you use several pulleys, you get a machine with a variable gear ratio. Such a machine can work with different disks and can easily cope with any materials from wood to sheet metal.

AT homemade machine the grinder is attached not to the work surface, but to the frame. It is necessary to fix the power tool firmly enough. Do not do this with plastic ties or clamps and self-tapping screws. However, in the very simple version You can use anything, even simple tape. The main thing is to never turn on such a machine, because the resulting vibrations will quickly destroy the mount, and high rotation speed combined with high power can cause serious harm to health.

For reliable fastening, it is necessary to use the clamps that come with some angle grinders or to attract the grinder to the frame with homemade clamps using screws and nuts. All threaded connections must be fastened with a retainer.

You can purchase a threadlocker at any auto parts store. To fasten the grinder, you must use a temporary latch, and to fasten other parts of the machine - a permanent latch.

An important detail of the working surface of the table is the thrust bar. It is installed parallel to the plane of the disk.

The easiest way is to make a thrust bar from an iron or aluminum corner. The thrust bar must be movable. For this purpose, the corner is attached not to the work surface, but to another plywood plate. In turn, the plate is located on the desktop. To fix it, you can use clamps purchased at a tool and building materials store.
The design of the bed is easy to come up with on your own.

The main requirement for it is the simplicity of the arrangement of all elements of the machine in it. After the work surface is attached to the frame and the grinder is fixed, you need to mark the slot for the disk. You can do this with inside machine. After the marks are made, the surface is removed and the slot is marked using a ruler and corner. You can cut the surface along the marked lines using the same grinder.

Important! you can not put a disc on the grinder for sawing wood. The fact is that he will almost certainly snatch the power tool out of his hands. It is almost impossible to keep an angle grinder with such a disk in your hands.

You can also cut plywood with a conventional abrasive disc. If you do not make an effort, then for the grinder it will be completely harmless. The only downside is a large number of smoke. Do not make these cuts while at home.

Plastic ties are useful for attaching the wire from the grinder to the bed. As a switch, you can use an extension cord with a power button built into it. The extension is also attached to the frame so that the button is in an accessible and convenient place.

You should not neglect your safety. There is one detail of the machine, the presence of which is simply necessary, but almost everyone does without it. This is a protective visor over the disk. You can make it out of plywood, in the form of a narrow box and fix it with furniture hinges so that he leans back. If you do not make such a simple defense, the risk of parting with several fingers increases significantly.

Additional Security Measures

The presence of a powerful engine and working parts moving with high speed, poses a serious danger to both the operator and those in the vicinity. The point is not only that it is easy to cut yourself on the sharp teeth of the disc. With careless work, the workpiece can break out of your hands and turn into a flying projectile. The saw blade itself can also be destroyed. Fragments of the disk scatter at high speed and pose a mortal danger. In order to minimize risks, when creating a machine, you must follow a few mandatory rules:

1. Do not place the switch on the working surface of the table. It must be placed on the side surface.
2. Be sure to make a protective cover.
3. Do not turn on the machine without attaching it securely to the floor.

Reducer or disc drive system

As already noted, the speed of the grinder significantly exceeds the permissible speed of the circular saw blade.

If you connect the disk directly to the grinder shaft, then of course it will not crumble from centrifugal loads, but it will become blunt much faster and work out of order.

All this together will lead to a quick failure of the drive and the grinder engine. For reliable operation, a system of pulleys and a belt is needed. One pulley is mounted on the shaft of the grinder, the other shaft of the saw blade. Bulgarian produces 9-11 thousand revolutions per minute. The disk should rotate at a speed of 6500 -7200 rpm.

The ratio of the disk diameters should be equal to the ratio of these speeds. Dividing one by the other, we get a coefficient of 0.7. Therefore, two disks are needed, the diameter of one should be 0.7 of the diameter of the other. The smaller of these disks must be placed on the grinder shaft, and the larger one on the disk shaft. Rims and belt can be selected at an auto parts store. When using a belt drive, you need to make a tension system. The easiest way to do this is to fix the grinder rigidly to the frame, and fix the work surface together with the disk shaft after installing the belt, pulling it in place.

The overall layout of the machine must meet the following requirements:

• The workpieces are fed from right to left, and vice versa for left-handers;
• The power button is located on the front side of the machine;
• It is necessary to work on the machine and position it so that no one is in the plane of the rotating disk.

Useful video

In addition to a full-fledged circular machine, a mini-device can be made from a grinder. More in the video

In any home workshop, from time to time there is a need for a circular saw. But because of this rare periodicity, it simply does not make sense to acquire it. Not cost effective. In this case, practice suggests a way out - to make a circular driven by a grinder. This is much cheaper than buying a factory saw for two hours of work.

Necessary tools and materials

To make a circular with your own hands you will need:

• Bulgarian;
• Electric drill;
• Welding machine (possibly);
• Screwdrivers and pliers.

Of the materials useful:

• Corner steel 25 or aluminum 50 mm;
• Steel plate;
• Bolts and nuts;
• Pipe sections.

The circular angle grinder will be connected to the network using a switch, which, according to all the rules, must be placed on the panel from the side of the worker. It should be available at any moment.

You may need something else, but the home workshop is arranged in such a way that a lot is replaced in it. Therefore, a strict list will not stand up to scrutiny. You will need some fasteners or screws, pieces of wire and insulation.

Rework process + (Video)

To be precise, it can hardly be called a remake, it is a refinement or expansion of the functionality of the grinder. You can divide the revision into stages or steps of the work. First, let's define the main tasks. It is necessary to make a table for the installation of a circular saw. It can be from any available material, but a steel corner base would be preferable.

The grinder should be painlessly installed and removed, so its fastening to the table should be open and accessible. The cutting disc will be installed directly on the grinder shaft. It must have height adjustment or change the height of the cutting disc above the table plane.

There should be an adjustable rail on the table. With its help, it will be possible to set the thickness of the board cut. As a special case, you can install an angular guide, if necessary.

So, constructively we make the machine for the existing angle grinder with height adjustment of the cutting wheel. For ease of construction, we use wood:

• We make a slot in the tabletop from the board for the saw. If it is a furniture board or a sheet of plywood, then it is advisable to strengthen it with an additional bar along the position of the cutting wheel;

• We mount the rear part of the machine structure on a hinge. Then we fix the grinder. To mount it, you will need a short bolt with a lock nut. The bolt will be screwed in instead of the handle, and fasten the grinder to the hinged part of the machine;

• On the side of the handle of the grinder, we make a clamp with a sawn adjusting bar. This is a U-shaped bracket, into which the handle of the drill should fit tightly. For density, you can glue rubber strips. An adjustment strip with a cut will be attached to the same U-shaped plate.

• We fix the hinge and the adjusting bar from below to the countertop so that the cutting wheel fits exactly into the cut of the countertop;

• We install the countertop on the base of the steel corner or wooden bars;

• We supply electricity. It is necessary to fulfill the conditions of electrical safety. It is better to connect with a cable that is not afraid of a piece of board accidentally falling on it;

• We do a test run. The saw blade should rotate without catching on the edges of the slot. If this is not the case, then it is necessary to change the position of the fastening of the hinge or U-shaped plate. The supply of material to the cutting wheel should not cause displacement or vibration of the grinder.

Both the grinder and the manual circular saw are a very successful removable drive for a stationary circular saw.

It is easy to make a manual circular saw from a grinder. To do this, you need to redo the protective cover so that almost the entire saw blade closes. And on the working sector of the disk, you need to install a movable protection that will move during operation. It is also desirable to install a nozzle for a vacuum cleaner on the casing if the saw is to be used indoors.

An additional curved handle made of thin-walled pipe must be installed in the front part. With this handle, it will be more reliable and safer to fix the position of the circular during operation.

You may have difficulty creating a stationary circular grinder or manual circular. On construction sites and forums, you can find the required drawings of simple structures.

In a powerful circular saw. Of course, you can install cutting discs directly on the grinder, but this is very dangerous, since the speed here will be monstrous. To secure the structure, the speed must be reduced and the torque increased. To do this, you will need a gearbox, the author’s cutting disc rotates no more than 6000 rpm, which allows you to comfortably and safely cut materials. It is not difficult to assemble such a homemade product, but it will always help out on the farm, especially since such machines cost a lot.

As a basis, the author decided to use a gearbox from an old grinder, thanks to him we reduce speed. As for all other nodes, they are assembled very simply using common materials. No special equipment is needed to make this wonderful grinder attachment. All fastenings are made quite reliably, and a shield is also used here, which will not allow chips to fly into your eyes. In general, the author approached the production quite responsibly. Let's take a closer look at how to make such a nozzle for a grinder!

Materials and tools used

List of materials:
- gearbox from an old angle grinder;
- sheet aluminum;
- Sheet steel;
- screws and more.

List of tools:
- ;
- screwdrivers and wrenches;
- ;
- a hacksaw for metal or a grinder.

The process of making homemade:

Step one. We disassemble the gearbox
First of all, let's take the gearbox from the grinder and analyze it. If the bearings are badly worn, it is advisable to replace them. First of all, we remove the anchor, we need to cut off the bow from it. The author then welds a nut to this part. The nut must be of such a size and with such a thread that it can be screwed onto the grinder shaft. Sand the weld well so that nothing interferes. As a conclusion, we have an excellent adapter that will allow you to connect to the gearbox.

Step two. Making a mounting bracket
A mounting bracket is needed to mount the nozzle in the place where the grinder bearing (nose) is located. This part includes a homemade clamp made of aluminum sheet. Take a piece steel pipe of a suitable diameter, a steel circle must be welded to it from above, this platform will be used to install a gearbox on it. The author decided to fix the clamping collar with two rivets to make it convenient to use.

Step three. Installing the gearbox
We install the gearbox, for its fastening we use screws with nuts and washers. To further secure the gearbox, we need two steel plates. They need to be welded to the support on which the gearbox is fixed. Further, holes are drilled in these plates, and they are screwed on both sides to the angle grinder with screws. Now the gearbox is securely fixed and during operation you can not be afraid that the device will fall apart.

Step four. We manufacture and install the bracket for the thrust plate
For the manufacture of this part, sheet steel will be needed, we will make a clamp from it. As for the long straight plate, two more plates with holes need to be welded to its edges, as a result, “ears” will be obtained, for which we will fasten the thrust plate.

The bracket also needs to be additionally secured with screws. To do this, we cut steel plates, drill holes and weld them into place. That's all, we get an excellent basis for installing the base plate.

Step five. Thrust plate
We take sheet steel and cut a groove in it. We will cut the plate itself to the right sizes and remove the burrs with a file. Weld “ears” to the plate for attaching it to the bracket.

Step six. Protective shield
This element is made of sheet aluminum, as it is the easiest to work with. We simply cut out the details according to the drawing using metal scissors. Further, the whole structure is assembled on rivets, for this it is very convenient to use a rivet gun. As a last resort, we collect everything on screws and nuts.

Step seven. Homemade assembly
In conclusion, it is recommended to paint all ferrous metal parts, so the car will look more beautiful, and the metal will not rust and collapse. First of all, we fasten the base plate, for this you will need bolts with nuts. Everywhere try to use a grower, as the nuts from vibrations quickly unwind. Now it remains to fix the protective shield, use screws with nuts or rivets.

Step eight. Testing!
That's all, our brainchild is ready, you can try it! The cutting disc rotates at a relatively low speed, but has a high torque, so the load on the grinder is minimal. This saw will also be much safer than if you installed the disc directly on the grinder.

The circular saw is widely used by home craftsmen for various types works. Making a manual circular grinder is a simple process that does not require special skills. It can be done with the help of improvised materials. But it is important to consider that such a tool is not able to completely replace a professional device.

Types of circular saws

Circular grinder is of two main types.

• Mini circular (rotatorizer)

This is a modern unit with a narrow scope, capable of adequately competing with stationary equipment. It is used for periodic household operations and in private workshops when assembling furniture.

• Stationary

This device is necessary for carrying out a significant amount of work: sawing, grinding, drilling, planing, tool sharpening. Compared to the mini-circular, the stationary unit is more massive and reliable in design.

What you need to make

Circular from the grinder is made using the following means:

• Bulgarian;

• sheet metal;

• screwdriver, wrench and pliers;

• a set of fasteners;

• metal corner

• disk with teeth;

• electric drill.

Video: The whole process of making circulars from angle grinders

Circular saw design

The design of a homemade circular saw includes the following main elements:

• Engine

The optimal choice of drive for the machine is the engine Bulgarians with a power of about 1 kW. Clamps are included with the angle grinder, allowing you to fix it on the bed.

The engine of the tool has a high speed and can function for a long time without interruption. It is recommended to choose an angle grinder that has high power, a durable gearbox and is equipped with a soft start function.

• sliding stop

It consists of several metal corners located on both sides of the saw blade. The lower edges of the sliding stop are rounded to increase the ease of use of the saw.

• Axial handle

It ensures a stable position of the circular saw. Made from metal rod. There are holes at its ends. The handle is attached to the circular using fasteners.

• Adjusting rod

Allows you to adjust the depth of cut. It is performed from steel bar with a diameter of 5-6 mm. One end of the workpiece is bent into a loop and secured with front bolts. A thread is provided on the shank of the bar, where the nuts are screwed.

• Reducer

For effective work A circular saw uses a system of pulleys and a belt. Need to ensure disk rotation speedat approximately 6,500-7,200 rpm. You should choose two discs with different diameters: in one it is equal to 0.7 of the diameter of the other.

If a belt drive is used, it is recommended to provide a proper tensioning system: the angle grinder is rigidly attached to the frame, and the working surface with the shaft is fixed after the installation of the belt.

Making a circular

A circular grinder is made by hand in several stages:

• Table preparation

It is necessary to ensure the stability of the table, eliminating possible rocking. As a frame, you can choose a metal profile structure. For the manufacture of the table surface, you can choose an iron sheet, plywood, glass, chipboard. There must be a slot for the cutting disc.

• Installing a grinder

The grinder should be fixed to the bar under the table top with clamps. Threaded connections must be fastened with clamps. When placing the disk, it is necessary to ensure that a significant part of it protrudes above the table top. A protective visor is installed above the disk.

• Installing the stop bar

A metal corner is used to create a thrust bar. It is recommended to install it on a special plywood. The plate with the bar must be fixed to the countertop with clamps.

• Electrical wiring

It is necessary to remove the wires and connect them to the extension cord. You can fix the wires under the table top with a stapler.

• Check disk

You need to check with your hand how easily the disc turns. It is worth further checking its progress when relieved stress. To control the efficiency, a short-term start-up of the circular is performed.

• Device startup

The tool is ready to go. From time to time, the engine temperature should be checked for overheating. Long-term engine loads and reducer angle grinder are not allowed.

Safety

When working with a circular saw, observe certain rules safety precautions:

• Before starting the unit, certain measures must be taken to prevent the possibility of injury. Using hand tool you need to position the start button at a distance from the cutting element. If applicable fixed structure, then the table with the mechanical part is screwed to the floor in advance.

• The circular is a potentially dangerous device, so when working with it, increased care is required. First of all, it is forbidden to stand in line with the rotating cutting element. In addition, it is highly recommended not to keep your hands close to him at a distance closer than 20 cm.

• It is highly recommended to feed the wood to the circular saw blade using special bars. Otherwise, there is a risk of injury to the hands if the material suddenly slips off.

With proper observance of all stages of work, making a circular saw with your own hands is a simple task. In this way, you can save a lot of money and time. Such a tool will be useful when performing various tasks around the house.

A stationary circular saw is the machine that should be in the workshop of every craftsman working with wood. With its help, you can quickly and effortlessly cut the board, cut the workpiece required sizes, cut wood.

The home master is simply obliged to acquire such a machine. It is not necessary to buy it, a home-made circular is guaranteed to cope with the amount of work of a home workshop, while costing a much smaller amount.

Circular saw device

being really useful tool, the circular has enough simple design. Its main nodes:

• bed - a frame on which the main units are mounted;
• tabletop with a slot for a disk;
• motor with rotation transmission system;
• cutting tool, disk with teeth.

Optionally, the device can be supplemented with a pusher, which ensures the forward movement of the workpiece to the disk, and various lifting mechanisms that regulate the cutting depth.

The principle of operation of a circular saw (circular saw) is that the rotation of the motor shaft is transmitted to a cutting tool, a disk with sharply sharpened teeth. The center of the disk is located below the level of the tabletop, only its segment is removed from it. A workpiece is brought to the rotating disk, the teeth bite into the wood, creating even cut.

A simple circular grinder or circular saw

Angle grinder (grinder) - one of the most popular tools home master, with its help it is easy to cut metal, clean welds. In addition, using a wood disc instead of a standard abrasive disc, the grinder can be turned into a hand-held circular saw (it is also called a parquet), and by making a frame with a table - into a stationary circular saw.

Required accessories

For work you will need:

• multilayer plywood with a thickness of 10 mm or more;
• switch and wire;
• bolts with a cap under sweat;
• screws;
• wooden block 40x40 mm.

You also need to prepare a drill or screwdriver, a hammer, a screwdriver, pliers, a ruler and a pencil. With the help of these tools, you have to make a circular with your own hands.

Of course, we must not forget the grinder itself or a hand-held circular saw. At the first stage, it will help to cut the material, and then it will take its place as a working body of the circular.

Sequencing

The first step is to make the body of the circular. Thick plywood is perfect for this, you can use any pressed wood boards. You will need to cut out four rectangular sheets, size 40 x 80 cm. A box with a square 80 x 80 cm at the base is assembled from them. Four bars are installed in the corners for ease of assembly and reliability of the structure.

From above, the resulting box is closed with a countertop. It can be made from the same plywood, but it is better to use some sheet material with laminated finish. This guarantees the durability of the machine, ensures the convenience of operating a home-made circular.

A cut is made in the tabletop to exit the disc, holes are drilled on the sides of it for attaching the tool.

The grinder must be securely fixed under the countertop. The design of the latch can be very diverse, it all depends on the configuration of the machine itself. The main requirement for fastening is that it must securely hold the angle grinder, preventing it from moving.

The simplest fastening may look like this: two metal squares, between them a grinder is fixed with a steel clamp.

In the upper shelves of the squares holding the grinder, two holes are drilled. The structure is fastened to the table top with countersunk bolts. It remains only to block the power button, connect the grinder through an external switch.

In the same way, you can make your own circular from circular saw. AT this case work is noticeably simplified due to the fact that you do not need to invent a mount. It is enough to make a cutout for the disk, drill holes through the holes in the hand saw plate.

Miniature machine from the engine from the washing machine

The circular is distinguished by its extreme simplicity and availability of materials for its manufacture. Perhaps its only expensive part is the electric motor. Stationary machines are equipped with a powerful asynchronous motor that provides cutting of thick wood of any species, but in a home workshop you can limit yourself to less power.

Note! For sawing boards of medium thickness, it is enough to make it yourself circular table driven by the engine of the washing machine.

This design has a number of advantages. The engine from an old washing machine is inexpensive, moreover, such a unit is likely to be found in the household of a home craftsman. Connecting this engine is not particularly difficult, there is no need to look for circuits, soldering. With all this, the power of such a unit is quite enough for most types of work.

The scheme of the machine can be simplified as much as possible by eliminating the belt drive. In this embodiment, the cutting tool will be mounted directly on the motor shaft. The bed of the desktop mini-machine will be a frame assembled from a bar with a section of 40 x 40 mm. If desired, it can be welded from a corner or a profile pipe.

As a stand (tabletop) for a circular, a part of the body of an old TV, coated chipboard, is ideal. As practice shows, this part is sufficiently durable, and thanks to the lacquer coating, it does not prevent the workpiece from sliding.

In the tabletop with an electric jigsaw, two parallel cuts are made perpendicular to the cutout for the disk. A movable square will slide along them, playing the role of a side stop. It will help to make an even cut, if necessary, at a given angle.

Stationary machine

Those who plan to seriously engage in woodworking should think about making a full-fledged stationary circular saw. It should be a separate unit mounted on a workbench, equipped with a powerful engine, with the ability to quickly change the disc. It will take time to make such a circular with your own hands, but it will definitely pay for itself.

Despite the apparent simplicity of this device, it is worth creating a drawing of the machine before starting work. This will allow you to visually see the future unit, choose its optimal configuration.

bed

The basis of any machine is a bed, a frame on which all the main parts are mounted. The frame of the circular must be stable and reliable, so it is made of metal. It is preferable to use profile pipe or thick-walled square. Welding is used to connect parts. If a collapsible design is conceived, a bolted connection is suitable.

Buy suitable material it will not be difficult, in any specialized metal rolling store you can pick up both pipes and a square. Those who want to save money can be recommended to contact scrap metal buyers. You can buy the same thing from them, only cheaper.

table top

The best material for making a professional circular countertop is metal. Steel and aluminum-based alloys are excellent. For budget option can be limited to thick plywood upholstered with sheet iron. In any case, the surface of the tabletop must be smooth, resistant to friction and not sag under a weight of up to 50 kg.

In the tabletop, a groove is made for the disk. It can be done in two ways. You can make a cut in a single sheet, or you can assemble a countertop from two halves. The second method is preferred for metal table top, drank in which it is difficult to do at home.

If desired, you can make a sawing machine for working outside the workshop, for this it is enough to provide for the possibility of installing a low-power gasoline engine, it can be removable.

Rotation transmission

Optimum circular drive - V-belt transmission. Two pulleys are used, one on the motor and one on the drive shaft. It's convenient and safe. There is no direct connection between the motor rotor and the disc, in the event of a jammed tool, the belt will begin to slip, signaling the need to turn off the power. In addition, using pulleys with several grooves of different diameters, you can adjust the speed of the saw by choosing optimal mode for different woods.

Rotation from the motor rotor is transmitted to the shaft. This is one of the most critical parts of the circular. It is unlikely that it will be possible to make a shaft on your own, it is better to buy a ready-made one or order it from a turner.

The shaft is mounted on bearings. They should be closed type: circular - a sawing place and open ones will not last long.

Pendulum suspended machine

Those who can boast of the ability to work with metal can be advised to make a circular with a pendulum engine mount. The main feature of the device is that the engine, shaft and cutting disc are installed in one common frame. On the one hand, it is hinged on the frame, the second is held by a screw with the ability to adjust the height. By changing the length of the screw, you can adjust the height of the disk exit from the tabletop.

This system allows you to adjust the height of the cut, as well as use discs of different diameters. If, instead of an adjusting screw, you use a probe brought to the countertop, you can get a simple copy machine. The probe will allow you to adjust the depth of the cut according to a certain pattern. This fairly simple refinement will turn a simple circular saw into a real woodworking machine. With such a device, you can not only cut the board into the necessary blanks, but also perform accurate cuts and make various selections.