Do-it-yourself manual circular saw. Do-it-yourself stationary circular saw - according to our drawings and instructions, anyone can do it

– a necessary and useful tool in the arsenal of a home craftsman. It is especially necessary for those who work a lot with wood. To make a circular saw on your own, all you need is a great desire, the necessary tools and the ability to work with metal.

Serious tool

A self-built circular saw can be a stationary or tabletop model. At their core, they are one and the same. The devices differ only in the height of the frame. What height to choose will depend on the intensity of use of the workplace. If the saw is rarely used, then it can be made in a tabletop version. If necessary, the structure can be disassembled and free up space in the workshop for other work. If a craftsman constantly works with wood, then a stationary circular saw is more suitable for him.

The stationary structure consists of several main components: a table, a gear disk, a motor, an adjustable side stop and a shaft.

To make it you will need:

1. Sheet of metal with a thickness of at least 8 mm.
2. Metal corner 45x45 mm.
3. Electric motor.
4. Metal disc with teeth (diameter 400 mm).
5. Ball bearings.
6. Welding machine.
7. Wooden block.
8. A piece of plastic or laminate.

Making a circular saw with your own hands will be much easier if you first draw up a drawing of the future structure and indicate all the necessary dimensions. All parts are manufactured in accordance with the drawing and then assembled into a frame using a welding machine.

ABOUT longitudinal cutting of rolled products.

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Assembly of a stationary structure

The main part of the saw is the table. The tabletop must be made of sheet metal. Its dimensions depend on the preferences of the master. The main thing is that the circular saw with your own hands is stable and comfortable to work with. If additional space is needed to install other devices, the surface can be covered with a sheet of thick plywood (Fig. 1).

Particular attention must be paid to the height of the guide. It is most convenient when the guide protrudes above the table by 120 mm. Experience shows that with this arrangement it becomes possible to process boards not only in width, but also in thickness.

Figure 1: A sheet of thick plywood is ideal for covering the surface of the countertop to accommodate additional accessories.

To make a guide for a circular saw, you will need 2 pieces of metal corner and a clamp that is welded to them. The metal part is deliberately made from two parts of the angle. The solid angle will guide you when the saw is working. You need to screw a wooden block to the corners using bolts and self-tapping screws, and attach a piece of plastic or laminate 120 mm wide to it. The length of the laminate piece should match the length of the table. This part should be set at an angle of 90° relative to the tabletop (Fig. 2).

A DIY circular saw should be height adjustable. In some designs, the table can be adjusted, but it is more convenient for work when you can raise and lower the saw itself.

A single platform is required to install the motor and shaft. It should be installed on one axis in the form of a rocker arm. It is fixed with a piece of bolt with a diameter of 15 mm, which is welded to it. On the side of the saw you need to weld a metal plate in which you first make a hole. Its shape should be oblong along the direction of the rocker. A bolt will pass through it, onto which a wing with handles should be screwed. The saw clamp is ready. If there is a need to adjust the height, the wing is unscrewed, the saw is aligned with the ruler and the wing is screwed back on. When using a disk with a diameter of 400 mm, you can process boards up to 240 mm wide (Fig. 3).

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Make other options

Figure 2. A piece of laminate must be attached to a wooden block, the angle of which should be 90° relative to the tabletop.

A do-it-yourself circular saw can be made manually. The easiest way to make it is from a grinder, making some improvements to its design. On the grinder you need to install an axial handle and a sliding stop.

To make a sliding stop, 2 pieces of corner will be needed. They are located on the sides of a disk with teeth, which replaces the abrasive wheel. The corners are attached with a gap of 3-4 mm. They are connected at the front and rear with bolts and nuts. To obtain clearance, washers must be used. The bottom edge of the corners should be rounded. Thanks to this, they will not cling to the objects being processed.

A do-it-yourself circular saw made from an angle grinder is equipped with a sliding stop. A clamp is attached to the body. It is made from metal tape. Its screed should be located at the bottom. A galvanized strip with a thickness of at least 1-1.5 mm is attached to the tape, on which a hole must first be made for the sliding stop bolt. Using washers, gaps are established between the working part and the side parts of the stop. The gaps must be the same size.

An axial handle is attached to the gearbox housing. To do this, the gearbox is disassembled so that you can determine at which points to make 4 holes for small bolts. The handle is made from a piece of pipe or rod and should have the shape of a staple. Its width is slightly wider than the master’s palm. At the ends with which it will be attached to the gearbox, it is necessary to drill holes for the bolts. It is not worth flaring the ends of the tube so that the handle does not bend during operation.

A piece of rod or tube protruding forward should be secured under the handle. Flare the end of the tube and make a hole for the axle 4-6 mm thick. The hole should be 4 mm larger. To make it convenient to work, a gap of at least 100-150 mm is left between the rod and the handle.

Figure 3. Diagram of a disk for a circular saw.

The next stage is the manufacture of the adjusting rod. To do this, you will need a piece of rod with a diameter of 4-6 mm. The end of the pipe is bent in the shape of a loop and slightly flared. Using washers at the front end of the stop, the same gap is established along the entire length.

The part of the rod that will fit into the hole on the handle must be threaded. Before inserting the rod, screw the nut onto it. The other nut is screwed on after assembly. The nuts will provide adjustment of the cutting depth. If necessary, they need to be released or tightened.

A stationary circular saw is an essential tool in a carpentry workshop - for those who perform carpentry work for their own needs or make various items to order. This stationary machine is easy to use – especially long and monotonous ones. With it, the master’s back is in a straight position, so he gets less tired.

Today, in stores, machines and tools are presented in a huge selection of models. However, they are too expensive for a simple carpenter, so to get out of the situation you have to look for other solutions. One such example is when a craftsman made a stationary saw with his own hands using a hand-held circular saw. Let's see below how he did it.

List of required materials:
hand-held circular saw;
plywood 11 mm;
M-8 bolts with a furniture head;
screws;
switch;
the wire;
timber 40x40;
furniture guides.

List of tools:
electric jigsaw;
hand-held circular saw;
drill;
screwdriver;
hammer;
screwdriver;
pliers;
ruler.

How to assemble a stationary circular saw

As we have already noted, the author used a manual circular saw to make his circular saw. At the same time, he made no changes to the design of the saw itself. In this case, the master made a table, attached the sole of the saw to the bottom of the tabletop - where the cut for the disk was made before. He drilled the holes and then sawed them. Taking plywood and 40x40 timber, I made a base.

After that, the author took plywood and cut out the tabletop. It is better that it is laminated or varnished, with a flat and smooth surface. As described, a cut was made, and holes were drilled in the corners for subsequent fastenings.

At the bottom of the tabletop we attach the circular saw using M-8 bolts. In this case, the bolt heads must be recessed into the plywood.

The author installed and connected the switch, fixed the start button on the saw in the pressed position, and connected the switch to the outlet. Therefore, there is no need to disassemble the saw, and there is no need to connect anything to it.

To make it more convenient to work with the machine, the craftsman made a movable stop on furniture guides.

The aluminum corner served as a longitudinal stop.

To adjust it, you should loosen the bolts and move it to the distance required for further work.

A homemade circular saw is a kind of handy tool that can cope with a number of construction tasks in domestic conditions. In principle, it won’t be difficult to make a circular saw yourself even if you don’t have any special skills, the main thing is to have at least a little idea about working with metal. The necessary material can usually be found in a garage or home workshop, and here a steel angle, a rectangular profile pipe and an engine will do. The assembled circular saw can be placed on an existing workbench, or, in the absence of one, you will have to build a table for the circular saw with your own hands. As for the motor, you can use a unit from an old washing machine or walk-behind tractor, but first things first.

Manual device from an angle grinder

If you have a grinder on your farm, then you won’t find a better device for a hand-held circular saw. Don't know how to make a mini circular saw at home from such a popular tool? Don’t despair, because its manufacture only involves providing a sliding stop and an axial handle to an existing unit. The sliding stop includes in its design two pieces of metal corner of a small cross-section, located on both sides of the saw blade. Using bolts and nuts, the corners are connected from the front and back sides with a transverse ligament, and the technological gap between the sidewalls of the thrust structure and the working element will be provided with washers.

It is necessary to put a metal band clamp on the grinder so that its screw tie is located at the bottom, and a strip of galvanized metal with a hole for a sliding stop, folded in half, is fixed to it. In principle, a special clamp with a stand can be made as a single unit, but in this case the thickness of the metal strip will ideally be at least one and a half millimeters. Next, you will have to make a couple of holes for bolts in the gearbox housing of the future circular saw, for which it is disassembled and the drilling points are determined. Through the holes made, an axial handle for a circular saw assembled from a grinder is attached, since the existing handle will not allow for high-quality cuts, even if the master has remarkable physical strength.

The axial handle, which will be equipped with a grinder grinder, is made of a metal rod or tube. The shape of the design can be a transverse bracket or a kind of horn. The ends of the metal part with which the handle is attached to the gearbox are equipped with holes for fasteners. There is one important point here: the ends cannot be riveted in order to prevent the handle from deflecting during the operation of a circular saw assembled with your own hands. It is also necessary to make an adjustment rod from a piece of metal rod (4 - 6 mm), for which we bend one end into a loop, rivet it a little and form a hole for the front stop bolt. As usual, we adjust the uniformity of the gap with washers.

At the other end of the rod, a thread is cut, thanks to which it is connected to the handle. First, one nut is screwed onto the thread, and after assembling the structure, a second one is screwed. By tightening and lowering the nuts of this device for a homemade hand-held circular saw, the depth of cut is adjusted. This is how, at home, you can convert an angle grinder into a full-fledged disk tool designed for cutting various materials. By the way, by remaking a circular saw from a drill, you can achieve a similar result.

Mini table saw

The mobility of the element is achieved by sawing the horizontal segment into two equal parts, which after installation are fastened with clamps. A circular saw is fixed to the vertical part of the frame with a clamp. An assembled hand-held circular saw table can function as a cutting machine if a standard cutting disc is installed on the grinder. It is worth noting that the through cut here will not exceed 80 mm, and to process larger lumber you will need a more serious homemade circular saw, which will be discussed further.

Stationary machine

A circular saw, as close as possible to factory models, requires a competent approach to assembly, so before making a stationary type circular saw, you need to think through everything down to the smallest detail. In principle, a tabletop mini circular saw differs from a stationary one in the height of the frame, which directly depends on the nature of the work performed and the dimensions of the workpieces that the device will process. One-time work can be carried out on a compact table saw, while a circular saw from a hand-held circular saw can be easily hidden in a shed or closet, and a carpenter who constantly manipulates lumber will need a stationary homemade circular saw. Below is a diagram that details all the elements and accessories for a circular saw of this type.

As can be seen from the figure, homemade circulars of this type have a clear design, and drawings like the one presented above greatly facilitate the process of assembling them. Before making a circular table, as well as mounting a circular table with your own hands, we will consider each part of the unit separately in order to know all the intricacies of its operation and installation.

Circular table

A table for a hand-held circular saw with a slot in the center is sometimes converted from an ordinary kitchen table or assembled from beams or metal profiles. Experts strongly recommend covering a table for a circular saw with a sheet of galvanized metal, since without a coating the base is at risk of abrasion in the center from constant friction of the lumber, which in turn will negatively affect the quality of the cut, and the depth of the cut will be uneven. It is better to make cross braces that strengthen the sawing table from a steel angle 60 - 80 mm with a horizontal segment outward in order to simplify the installation of the side stop. The homemade table on which the circular saw will be installed must be strong and stable, and it must also be securely fixed in a stationary position.

Saw blade

The toothed disk should rise above the surface of the table of the circular saw by a maximum of a third of its diameter, otherwise it will not cut the tree properly, and the process itself will become dangerous. If you need to cut a beam with a diameter of, for example, 100 mm, the same parameter of the cutter should not exceed 350 mm, however, a motor with a power of 1 kW will also be required. For workpieces with a diameter of over 150 mm, a mini circular saw made by hand is unlikely to be suitable. Some factory circular saws are equipped with a riving knife, which is installed behind the disk at a distance of 2 - 3 mm from the saw teeth. It eliminates the jamming moment due to the closure of parts of the sawn workpiece, so it can also be very useful in the case when a homemade circular saw is assembled.

Adjustable side support

It is possible to install a high-quality stop from a steel angle with a cross-section of about 80 mm, which is 3–4 cm longer than the table structure. The flat sides of the corner are bent down so that their width is one and a half cm greater than the thickness of the table. After installation, the emphasis is fixed on a homemade circular table in a given position using bolts. This element is adjusted according to a template placed between it and the cutter.

Shaft

The shaft installed on the circular saw is the most critical component, so its turning and testing together with the disk should be carried out exclusively by a specialist using special equipment. A pipe product with a carelessly fixed circle is immediately excluded, because the slightest errors in the operation of this element will result in major troubles such as equipment breakdown, damage to the workpiece and injury to the operator. The optimal solution would be to purchase a ready-made shaft with a seat for the cutter. It is better to give preference to self-aligning ball bearings that have a curved inner surface, otherwise the unit you made yourself will quickly collapse and the shaft mounted on a homemade circular will become unusable.

Broadcast

In our case, the ideal option would be a V-belt drive, but it is better to refuse a rigid gear mechanism, since such a homemade product does not guarantee safety. If a nail suddenly gets caught in the lumber, the motor rotor will cause the disc to fracture, which can lead to injury. If the inner diameter of the belt drive pulleys is small, then slippage will be ensured, and the tensioned belt will serve as a kind of damper. The gear ratio is usually selected based on engine speed, always taking into account the permissible number of disk revolutions. The smaller the diameter of the saw wheel, the higher its rotation speed can be, and the cleaner the converted unit will cut.

Motor

Among home-made devices, the most popular is a circular machine assembled from a washing machine motor. This choice is explained by the fact that its operating scheme is best suited for such purposes. Unlike collector units, which are usually supplied with power tools, the engine from a washing machine operates at lower speeds, which means that it lasts longer, has increased efficiency and is not so susceptible to all sorts of blockages. You can also use a three-phase motor, but then additional costs will be required for the purchase of a starting and operating capacitor, so it is more economical to make do with a device from a washing machine. That, in general, is all the wisdom.

The household often lacks a circular saw, especially if major renovations or construction are underway. Not everyone can afford industrial products - they are too expensive. But you can make a circular saw yourself, using materials that are available in the household.

Design - main components, their purpose

A do-it-yourself stationary circular saw is created with advancement in several possible directions:

• adapting existing hand tools using the motor and circular saw for new capabilities;
• improvement of industrial products to expand functionality;
• assembly of individual parts, manufactured mainly in-house.

A stationary circular machine includes several main components: a table, a shaft, a motor and some others, the characteristics of which are not so important.

The table is used for fastening woodworking mechanisms. It can be assembled entirely from metal, which is preferable, especially for machines with a high-power engine. Wood also makes good circular tables. But it is necessary to take into account that the tabletop should be covered with a sheet of metal, otherwise the wood will soon wear out. Tables must be very rigid and stable, capable of withstanding considerable load during work. The surface is made perfectly flat; protective shields must be installed above the rotating parts.

For a homemade circular machine, a washing machine motor is quite suitable. Portable tools are less suitable: their commutator motors are designed only for short-term work. They have very high speeds, low efficiency, and are afraid of clogging. You can use a three-phase electric motor, but if the household does not have 380 V, you will need to purchase capacitors to make it work on 220 V.

The most important component is the shaft. Use a ready-made one, if available, or machine it from round metal. The work on the lathe is performed in one setup, then the assembly with the working parts is checked for centering. Even minimal runout is unacceptable, otherwise during work it will become stronger, at which it is unacceptable to work. Seats are provided on the shaft: for a circular saw and for pulleys on the other side. You can also make grooves for planing knives.

Main parameters - calculation of power, speed, gear

The characteristics of the circular saw, the engine and the maximum thickness of lumber that can be cut are interconnected. The maximum speed for which it is designed is indicated on the purchased circular disk. The number of revolutions transmitted by the engine to the shaft should be less. The engine power affects the maximum permissible saw tooth diameter. The diameter must be at least three times the thickness of the material, otherwise sawing will be difficult. It is believed that to cut materials 100 mm thick, you need a motor of at least 1 kW of power.

The transmission is made only by a V-belt - if foreign objects get under the saw, the material jams, the belt slips on the pulleys. Injuries in such cases are practically eliminated. It is important to choose the right gear ratio. We take into account two indicators: engine speed and the maximum permissible speed of the circular saw. We calculate the required pulley diameters. A pulley with a large diameter is installed on the engine, and a smaller one on the circular shaft to increase the number of revolutions.

The revolutions of the shaft with a circular saw are as many times greater than the engine revolutions as the diameter of its pulley is smaller than the diameter of the pulley on the engine.

Woodworking machine - a capital product for the home

To work with wood in large volumes, it is better to have a machine that allows you to cut the material, plan it, and select a quarter. A fairly powerful electric motor and a rigid table are required. We present a structure made of steel angle and sheet steel. It provides a cutting depth of 60 mm; you can plan boards 200 mm wide. A three-phase motor of 1.1 kW, 2700 rpm is used. To connect to 220 V, capacitors are required.

1 – machine frame; 2 – panel; 3 – starter; 4 – device for height adjustment; 5.7 – work table of two halves; 6 – base; 8 – engine; 9 – platform; 10 – M10 studs; 11 – circular disk; 12 – shaft; 13 – stops of the lifting mechanism; 14 – driven pulley; 15 – belt; 16 – drive pulley; 17 – switch.

The work table has dimensions of 700×300 mm. In the drawing we see that the height of the entire structure is 350 mm. The height is not sufficient for comfortable work; the circular saw will have to be installed on an additional platform; it weighs only 35 kg. You can increase the length and width, increase the height up to 1200 mm. We adjust the remaining sizes to fit them, but the design features remain unchanged.

First we make the bed frame from steel corners 25x25 mm. If we are not going to increase the height, we make another similar lower frame. For a frame with a higher height, first we weld four legs from the same corners to the upper frame, and then we tie them at a height of 15–20 cm from the bottom. The lower frame has grooves for the engine platform locking bolts. Two studs are welded to the back side of the platform, which go into the holes on the back of the lower frame. By tightening the studs, we tighten the belts, then we lock the platform by tightening the nuts on the studs that go into the grooves.

To adjust the height of the table in relation to the saw, we use a simple lifting mechanism. It consists of racks, in the upper part of which we cut grooves at an angle of 45°. A total of eight racks are needed - four on each side. We weld them to the frame with grooves located in a mirror image. We attach cross members to the outer posts. We drill holes in the middle of each of them and weld nuts. Threaded shafts will move along them to regulate the lift.

Their ends rest against racks welded to frames assembled from 75x50 mm corners. We weld studs into them on the side opposite the grooves for the adjustment mechanism. The table consists of two equal halves and is attached to the frames with countersunk bolts. The adjustment mechanism works like this:

• loosen the nuts on the racks;
• we turn the screw, which presses on the stop, raising or lowering the table;
• tighten the stud nuts;
• We perform a similar adjustment for the second half of the working surface.

The design can be simplified without installing an adjusting shaft. Raise and lower the table manually. If you assemble the table not from two halves, but from one piece, you will only need four racks for the lifting mechanism.

Hand-held circular saw - turning into a stationary one

It’s easy to make a stationary one from a hand-held circular saw, expanding its capabilities. The first thing you need is a table. A convenient material is Finnish plywood, which, unlike ordinary plywood, is laminated - the workpieces glide well over the surface during processing. It is thick enough to withstand a lot of weight, moisture resistant, and easy to process. You can use ordinary 20 mm plywood, but you just need to paint it, or better yet, cover it with sheet steel or textolite.

You need to understand that the depth of cut will decrease by the thickness of the cover. You will need a large diameter disk so as not to reduce functionality compared to a portable tool. We make the dimensions of the tabletop sufficient to ensure that the workpiece fits in width. It should be added that on a wide table you can additionally strengthen an electric plane and a jigsaw, which will make the machine universal.

Using drawings and explanations, it is not difficult to make additional accessories for a circular saw that will expand its capabilities.

We mark a rectangle of the required dimensions on a sheet of plywood, cut it out, and process the edges. Using the sole, we apply a hand-held circular saw to the surface and mark the attachment points with a pencil. We make a slot for the circular saw. You can slightly deepen the attachment point using a milling cutter, but not more than 10 mm, so as not to weaken the tabletop. This manufacturing method will allow you to bring the cutting depth closer to that indicated in the circular saw’s passport.

From the boards we make a frame (tsars), which we install from below to strengthen the structure. We fasten four boards into a box, glue them to the tabletop, securing them with clamps. We screw self-tapping screws into the boards across the table. We countersink the holes for them from above so that the heads of the screws are hidden. We attach the legs to the frames of the stationary saw, preferably with bolts, washers and nuts. The table should be provided with additional rigidity, so we make spacers at the bottom of the legs.

We make a limit bar equal to the length of the working surface. In it we drill two grooves perpendicular to the disk, in which the bar will move and be fixed at a certain distance from the saw blade. It remains to make changes to the control system: we fix the control button in the on state with electrical tape. We install an outlet connected to the network on the drawer. We install a switch in the gap in the wire going to the saw.

Some aspects of the execution of homemade devices

No matter how well a circular machine is made, individual errors can lead to its performance being limited. This concerns, at first glance, seemingly trifles. Let's start with the bearings for the shaft. Installing conventional ones is justified if the machine is used from time to time. For a homemade device with permanent use, it is better to install self-aligning bearings. They consist of two rows of balls and are adjusted by tightening the clamping nut. Be sure to install a cover to protect against dust and chips.

On the working surface we apply a scale in centimeter increments. This will make woodworking much easier when determining the width of the cut. Many people neglect to install a protective shield over the disk, but in vain - treatment for chips getting into the eye or in more serious situations is more expensive.

When working with various materials, it is often necessary to adjust the speed of the circular saw. A homemade design, as a rule, does not have the ability to regulate engine speed. There is only one way out - the use of pulleys of different diameters. They are installed on the motor shaft. If you decide to order pulleys from a turner, immediately make a solid pulley with two or three different diameters.

Many people want to install a three-phase electric motor on a sawing machine, without having 380 V. They will need capacitors designed for a minimum operating voltage of 600 V of paper or oil-paper type.

We calculate the capacitance of the capacitors based on the power of the electric motor: for 1 kW - 100 µF for the working capacitor Av. We take the capacity of the starting joint twice as large. The SB trigger is a button that automatically returns to its original position. Startup is simple: turn on SQ, press SB for a couple of seconds. After starting, the button is released, as soon as the engine picks up speed, you can cut.

Many summer residents and owners of private houses were faced with the need to process and saw boards, plywood and other lumber. For such work you will need a circular saw, which will not be difficult to do using available tools. Such homemade equipment will not be inferior to purchased equipment in functionality and quality of execution, allowing you to save several tens of thousands of rubles on the purchase of ready-made units.

Description of equipment

DIY circular saws can be stationary or portable. The design of the simplest circular saw will include a metal or wooden supporting frame, inside of which are mounted an electric motor, an electricity supply control unit, a table top and the working saw itself, which is mounted on the circular saw shaft or installed through gears and a trunnion mechanism. The saw is located in a slot in the tabletop, which makes it easy to cut lumber, performing high-quality wood processing.

The table top can be made from lumber or you can use ready-made metal blanks for this. Smooth easel tables are made from wood, The top of such a tabletop will need to be covered with a durable metal sheet. Otherwise, without metal protection, the wood will begin to wear out quickly, and the equipment will last several years during active use, after which complex and expensive repairs will be required.

First of all, you need to decide on the main tasks of the sawing machine. If you need to cut boards or firewood for the winter, then a simple installation of a sturdy table with a slot for a disk will be sufficient.

Some models imply the presence of an additional shaft to which knives, a jointer and a plane are attached. Such universal machines are equipped with powerful electric motors, which allows you to perform a wide range of wood processing work. When manufacturing a multifunctional machine, it is necessary to be guided by high-quality diagrams and drawings that will allow you to create universal and reliable equipment.

If you need to perform various types of carpentry work, then set up a coordinate table with guides. The existing stops and guides can be fixed at different angles, which allows not only to ensure safe operation of the machine, but also to perform high-quality wood processing, easily changing blades to saws of different diameters.

Advantages of homemade equipment

Homemade circulars are very popular due to their ease of manufacture, durability and reliability. Today, many summer residents use homemade units rather than buying expensive equipment in specialized stores.

The main advantages of this technique include the following:

• The versatility of the tool.
• Ease of manufacture.
• Possibility of significant savings.
• Reliability and durability of equipment.

The designs of stationary and mobile circular saws available on the Internet and in thematic printed publications make it possible to produce equipment for processing both thin workpieces and thick lumber. You can choose the simplest options that do an excellent job of processing lining, thin slats and plywood.

Characteristics and power

The functionality of using the equipment will depend on the correct choice of parameters, including speed indicators and drive power. The power rating is affected by the maximum permissible diameter of the toothed saw. It is believed that to process lumber with a thickness of about 10 millimeters, an electric motor with a power of 1 kW will be required. Based on the thickness of the processed and sawn timber, you should select the power of the electric motor.

Transmission from the drive in a self-made circular machine is best done using a V-belt. This allows you to ensure the necessary safety of using the equipment. When foreign objects get under the saw, the V-belt drive will slip on the pulleys, which eliminates injuries and jamming of the working disk.

Making a circular saw

Before proceeding directly to the manufacture of a circular machine, it is necessary to think through its structure and design, and ideally, select a drawing diagram according to which all work will be carried out in the future. When planning the manufacture of the frame, it is necessary to remember that such a design must be stable and reliable. For industrial powerful saws, the base is made of reinforced welded metal structure. For household models, you can use wooden blocks with plywood for the frame or weld a base from a metal corner.

The choice of electric motor used will depend on what kind of work and what kind of wood is planned to be processed on the machine. The drive can operate from a single-phase electrical network, or powerful industrial motors are used that operate from a three-phase electrical network.

You can make a powerful and easy-to-use circular saw from a washing machine motor. This won't be too difficult. Such motors are compact in size, operate on a single-phase network with a voltage of 220 volts, are reliable and are capable of operating at high speeds.

One of the most important components of a power saw is the shaft on which the working saw is mounted. You can use a ready-made shaft from similar equipment or make it using a milling cutter from round timber. Turn the shaft on a lathe, checking for perfectly accurate centering. Even minimal shaft runout is not allowed, since in the future it will be impossible and unsafe to work on such an incorrectly centered circular machine. Seats for pulleys and a circular saw should be made on the shaft.

The saw blade should rise above the surface of the worktop by a maximum of one third of its diameter. Otherwise, with a higher saw height, it will be difficult to process wood, and working on such a machine will simply become dangerous. If it is necessary to work with timber, the diameter of the saw blade will be approximately 350 millimeters. To process boards, you should choose small discs with a diameter of 250-300 millimeters. The quality of the saw blades used must be given due attention, since in the future the mini-circular saw will bear a significant load, low-quality blades will quickly become dull and require replacement.

Materials and tools

Making a circular saw with your own hands is not particularly difficult. For this work you will need the following materials and tools:

In each case, the design of the circular machine will be different, so it is necessary to select certain components, which will allow us to produce functional and reliable equipment. When using lumber to make a base and desktop, the wood will need to be coated with impregnations that protect the material from rotting and moisture.

Step by step assembly

You can make a stationary circular saw with your own hands from a grinder and a hand cutter without making any changes to the design of the working tool. The base is made of lumber, which significantly simplifies production, eliminating the need to use complex welding equipment. Step-by-step instruction:

This option for making a circular saw will be an excellent choice if you need a tool for cutting boards up to 3 centimeters thick. If you need to make a powerful and multifunctional device for your home, then use electric motors with a power of 5 kW or more, which allow you to process and saw boards 5-8 centimeters thick.

Making a homemade circular saw is not particularly difficult. You can use grinders or hand saws, which are mounted inside the wooden base of the machine.

Some craftsmen make more complex tools that involve the use of powerful electric motors, V-belt drives and larger diameter saw blades. If you have any difficulties, you can find thematic videos online that tell you how to make a circular saw with your own hands.