Homemade circular saw. Stationary circular saw with your own hands. Video: making a circular saw from a circular saw

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, which is not difficult to perform from improvised means. Such home-made equipment will not be inferior to the purchased one in functionality and quality of performance, allowing you to save several tens of thousands of rubles on the purchase of ready-made units.

Equipment Description

DIY circular saws can be stationary or portable. The design of the simplest circular will include a metal or wooden supporting frame, inside which an electric motor, an electricity supply control unit, a table top and the working saw itself are fixed, which is mounted on the circular 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 of lumber or use ready-made metal blanks for this. Flat easel tables are made of wood, from above, such a countertop will need to be covered with a durable metal sheet. Otherwise, without metal protection, the tree will begin to wear out quickly, and the equipment will last for several years during active operation, after which complex and expensive repairs will be required.

First of all, it is necessary to determine the main tasks of the sawing machine. If you need to cut boards or firewood for the winter, then it will be enough the simplest installation from a sturdy table with a slot for the disk.

Some models imply the presence of an additional shaft to which knives, jointers and planers are attached. Such universal machines equipped with powerful electric motors, which allows you to perform a wide range of woodworking jobs. When manufacturing a multifunctional machine, it is necessary to be guided by high-quality drawings that will allow you to make versatile and reliable equipment.

If you need to perform various kinds of carpentry work, then equip coordinate table with guides. The existing limiters and guides can be fixed at different angles, which allows not only to ensure the safety of work on the machine, but also to perform high-quality wood processing, easily changing different diameters.

Advantages of homemade technology

Homemade circulars are very popular due to the simplicity of their manufacture, durability and reliability. Today, many summer residents use home-made units, and do not buy expensive equipment in specialized stores.

The main advantages of this technique include the following:

Tool versatility.
The simplicity of its manufacture.
Potential for significant savings.
Reliability and durability of equipment.

Available on the Internet and thematic printed publications, the schemes for the execution of stationary and mobile circulars make it possible to manufacture equipment for processing both thin workpieces and thick lumber. You can pick up the simplest options that do an excellent job of processing lining, thin lamellas and plywood.

Characteristics and power

It is from the correct choice of parameters, including indicators of revolutions and drive power, that the functionality of the use of equipment will depend. The power rating is affected by the maximum allowable sawtooth diameter. It is believed that processing lumber with a thickness of about 10 millimeters will require an electric motor with a power of 1 kW. Based on the thickness of the processed and sawn lumber, you should choose the power of the electric motor.

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

Making a circular

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

The choice of the 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 be powered by 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 from a motor from washing machine. It won't be too difficult. Such motors are compact in size, operate from a single-phase network with a voltage of 220 volts, are reliable and capable of operating at high speeds.

One of the most important components of the electric saw is the shaft on which the working saw is attached. You can use a ready-made shaft from similar equipment or make it on a milling cutter from round timber. Turn the shaft into lathe, checking perfectly fine centering. Even the minimum runout of the shaft is not allowed, since subsequently it will be impossible and unsafe to work on such an incorrectly centered circular machine. On the shaft, seats for pulleys and a circular saw should be made.

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

Materials and tools

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

In each case, the design of the circular will be different, so it is necessary to choose certain components, which will make it possible to produce functional and reliable equipment. When using lumber for the manufacture of the 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 greatly simplifies manufacturing, eliminating the need to use complex welding equipment. Step-by-step instruction:

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

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-belts and larger diameter saw blades. If there are any difficulties on the network, you can find thematic videos on how to make a circular with your own hands.

The main component of a carpentry home workshop is a circular saw. It is intended for primary processing of materials by manual or automated method. Due to the high cost of factory equipment, craftsmen most often come to the conclusion that it is best to make this machine with their own hands.

Requirements for household circular machines

Structurally, it should not differ from factory models. They consist of a support table, in the center of which there is a slot for a saw blade. In addition, the design contains measuring components, elements for fixing the workpiece and for ensuring the safety of work.

Before manufacturing, it is necessary to familiarize yourself with the basic requirements for its components. It is important that they fit each other not only structurally, but also in terms of technical parameters. To do this, you can take a diagram of a typical design of a factory woodworking machine.

Complete set of woodworking saw equipment:

table. Must have sufficient stability, the surface of the countertop is perfectly flat;
power point. The main parameters of the electric motor for rotating the disk are power and number of revolutions;
additional components. These include stops for fixing a wooden workpiece, rulers for measuring.

The advantage of home-made models is the ability to choose its dimensions, performance and other technical parameters. In the process of drawing up a manufacturing scheme, you can choose the optimal height of the table, the dimensions of the tabletop, and the characteristics of the electric motor. This does not have a hand tool for woodworking.

Requirements for woodworking discs directly depend on the parameters of the workpiece, the type of wood and the required productivity speed. This is calculated on an individual basis.

Materials for the manufacture of a circular machine

After drawing up the optimal drawing for the manufacture of stationary equipment with your own hands, you need to select Consumables. To do this, you can purchase rolled metal or use existing components.

The main problem is the choice of the power unit. Some recommend installing a factory-made hand saw. However, often they do not have the necessary power to process large volumes of wood. In addition, the limitation on the diameter of the disk will reduce the functionality of the equipment. Therefore, it is best to choose drawings in which there are two separate blocks - an electric motor and a shaft for mounting the disk.

The connection of the load-bearing elements of the desktop is carried out by do-it-yourself welding. Mechanical components will not provide a proper indicator of reliability, as backlash will form due to constant vibration.

table. For legs, you can use steel corners 30 * 30 or 40 * 40 mm;
countertop. It is made of dense chipboard, although experts believe the best option application of steel sheet. In this case, a lattice structure is made in the upper part of the table;
electric motor. You can apply any household models asynchronous power plant 220 V, the power of which does not exceed 1.5 kW, and the maximum number of revolutions is 2400 rpm;
a system of pulleys for transmitting torque on a shaft with a disk. Pulleys are best taken from the factory. A tensioning system must be provided.

To fix the workpiece along the length, it is necessary to provide a support bar. It should shift relative to the plane of the disk, thereby adjusting the width of the board being processed with its own hands.

Before welding, all steel blanks must be cleaned of rust. Painting is carried out only after the final manufacture of the saw machine with your own hands.

Assembling a homemade circular machine

After preparing the components, you can begin to assemble the structure on wood. Drawings are drawn up in advance, on which all the parameters of the elements are indicated: dimensions, welding places, mandatory processing zones.

First, the frame of the saw machine is assembled with your own hands. It is necessary to provide places for mounting the shaft with the disk and the electric motor. Pulleys should be located on the outside. This is necessary for the periodic tightening of the transmission belts and the prompt implementation of repairs.

According to the diagram, a slot is made in the center of the tabletop through which the disk will pass. The edges of the material must be processed, but the countertop must be even. The plane of the disc must be strictly perpendicular to the surface of the table. Recommended slot dimensions: width - up to 5 cm; length - up to 400 mm.

The motor control unit is located in front of the cutting area. This will help prevent chips from getting into electrical components.

To get acquainted with an example of making a circular saw with your own hands, it is recommended to watch the video material:

A hand-held electric saw is a useful and convenient thing, but you won’t be able to work with it for a long time, since you need to make an effort. If you need to cut a whole tree or you constantly have to work with large volumes, then for this a circular saw is made from a circular saw with your own hands.

In contact with

Advantages and features of the tool

A circular saw has its advantages: it allows you to make an even cut, increases the speed of installation, provides ease of use, saves electricity. If you replace the disc, you can overcome soft metal. To make a full-fledged tool for work, you need to install it on the table and provide access from all sides.

In this case, the following conditions must be observed:

the table must be well reinforced, for which its legs are sometimes poured with concrete or bolted;
the hand saw is fixed with iron brackets to the tabletop to ensure safety during operation;
grounding is required.

Discomfort at work represents a large width table. Optimal size should not exceed 60 - 70 cm, so that it is convenient to hold the bar (not on outstretched arms).

If the work surface is not static, then the quality of the cut deteriorates, so fixing is necessary. The wire can be fixed with staples in the floor so that you do not accidentally stumble during operation.

As an option - make an additional outlet under the countertop.

First you need to prepare a drawing with an indication of the dimensions. It's almost a blueprint, but simplified. On paper, you need to indicate the amount of clearance for the disk - in width and length, where it should be in relation to the edges of the table. You can immediately imagine your work behind such a device.

Required accessories

Of the additional tools you will need:

for fasteners;
pencil or marker for marking;
roulette;
sandpaper.

During the course of work, need a milling cutter.

To make a table, you need to prepare:

2 guide rails;
bolts;
sheet size 60/120 cm;
blank for a table with legs (if any).

The bed can be made independently from ordinary wooden blanks fastened together with slats, or a ready-made sawing table, iron or wooden, can be used.

Chipboard prices

Description of the workflow

How a saw blade guide is made. To make the cut even, a guide ruler attached to the workbench will help.

The essence of the device is to prevent the sawing material from moving during operation.

The easiest option is to attach two profiles, one to the sole of the saw, the other to the saw table.

To do this, you need to pick up two pieces of pipe, you can use aluminum square profile different size. Pipes must be cut vertically with a grinder. You should get a design according to similarity rails when one part enters another.

Next, you need to measure a piece along the length of the table. Pre-cut a recess and plant a profile in it, securing it with bolts from the bottom side. A smaller profile is cut to the length of the sole and bolted on. The edges of the metal should be sanded so as not to interfere with smooth movement. It remains to combine both profiles and test the device.

How to make a workbench

A table for a circular saw with your own hands can be made from MDF, chipboard, thick plywood, wood, metal. plastic material does not fit.

Stages of work:

Measure the required length and width from a sheet of material.
Trim with a grinder and grind the edges.
Attach the tabletop to the legs of the table with bolts, for fidelity, you can use wood glue.
Level the top with a level, fix it to the floor with metal brackets or pour concrete.

Important! The tabletop is installed on the legs after fixing the saw.

A circular saw from a circular saw is attached from below to the table with wooden slats.

Prices for MDF

Description of works:

Turn the countertop over, mark with a marker and cut a hole for the disk.
Cut off the top layer in the shape of the sole to a depth of 0.7 mm.
Take two bars and fix the sole with screws parallel to the length of the table.
Fasten the sole perpendicular to the table with two more slats.

Attaching the circular saw to the workbench is ready. If you plan to work permanently, then you can equip the table with an additional emphasis. This requires an even beam along the length of the countertop. It is required to install it parallel to the saw blade, preferably in a recess, secure it with bolts. It is important to align the part well so that it is strictly parallel - the quality of the cut will depend on this, especially if you need to make furniture.

Shaft manufacturing

How to make a do-it-yourself circular shaft.

If a circular saw is assembled in parts with your own hands, the engine is taken from a washing machine, the discs are bought separately or removed from a non-working grinder, then you will have to think about how to machine the shaft.

It is not safe to make this important part from old pipes, since the disk itself will be attached to the shaft.

Do-it-yourself circular saw shaft make it hard. Here you need a professional turner, preferably not a beginner. First you need to choose a special 45th steel grade. The material is wear-resistant and elastic, specially designed for the manufacture of shafts, cylinders, gears.

For turning on a lathe, a double-sided mount is used. The part is first processed with a conventional cutter to give desired diameter. Next, with a finishing cutter, all burrs are removed. A small allowance is left for final polishing with sandpaper to a mirror finish.

Grooves on the shaft are made with a grooving cutter, as indicated by the drawings. In the process of work, you can remove the part and try on components that will subsequently be mounted on it.

On the shaft you can install fasteners for:

various cutters that can be useful when turning curly wood products;
conventional circular;
planer knives.

A do-it-yourself homemade circular saw is equipped with a motor from an old washing machine. It is necessary to connect a starting device corresponding to the engine power to it.

When installing electrical must be respected safety regulations:

Provide thermal protection for cases of voltage increase.
The switchboard must be installed on a material that does not conduct current.
If a metal frame is installed, then the electrical wiring should be well insulated.
If homemade machine with a circular saw located outdoors, the electrical assembly must be protected from water.

If it is difficult to conduct an electrician for a circular saw with your own hands, then it is better to turn to a professional so that the equipment works for a long time and without breakdowns.

miniature model

To work with plexiglass, plastic, laminate, a minicircular can be useful - a small design that looks like a stool with disk in the center y.

This model is designed for thin sheets of material and will not withstand heavy loads.

You can use the grinder by attaching it from below using the method described above.

For emphasis, you can attach a bar 2 cm high.

The legs do not have to be strengthened, because the device is planned to be transferred.

Note! The device copes well with thin soft materials, but the tree is difficult to work with, to work with it you need to increase the power of the motor.

The motor power on the microcirculator is small - up to 40 watts. The disk can be taken from a hand saw, but it is quite possible to use a prefabricated structure, where a threaded rod acts as a shaft - a construction stud. The disk is fastened with a nut screwed onto the thread.

Other accessories

Do-it-yourself various devices for a hand-held circular saw are easy to make. One of them is a regular bar that is inserted into the stop included in the kit. The standard stop does not allow cutting wider parts, as it is designed for a certain width, different for each model. To be able to increase the gap, you need to insert a stop between the wall wooden detail necessary width and push her soles.

You can make a tool for cutting grooves, which can be useful in the manufacture of furniture.

A circular saw from a hand-held circular saw can be adapted for cutting at an angle. Both additional parts and the possibility of fixing the disk itself at the desired angle are used.

A simple device for trimming with a hand-held circular saw. It is possible to cut at a given angle.

The wedge auxiliary part is suitable for the production of round wood blanks for decorative purposes.

The end cut is used in construction for wood finishing of walls, which are subsequently varnished, leaving the transverse structure of the tree visible.

In order not to waste money on various devices For small jobs, you can try to independently think over a solution to the problem and create a working tool from the available materials.

Old hand saws, possibly with a non-working motor, are suitable for arranging a circular saw. Construct workplace it is possible according to any scheme. By selecting parts according to power, it is possible to cut materials of various widths and densities. With the help of additional devices, you can organize a carpentry workshop and perform various operations without extra costs.

Video: making a circular saw from a circular saw

A circular saw is required in private households quite often, but it is not at all necessary to buy an expensive tool for this. You can make a circular saw with your own hands from improvised means.

Basic materials and tools

To create a circular saw, you will need materials:

pipe (45 mm);
channel;
corner "4" and "6";
boards 30 mm wide;
metal sheet up to 8 mm thick.

Of the nodes you will need:

engine;
bearings.

In the work you can not do without tools and materials:

jigsaw;
impeller;
screwdriver;
screwdriver;
scotch;
hammer;
wire cutters;
pliers;
tape measure and triangle-ruler.

How to do it yourself?

A circular electric saw for wood can be made with your own hands from various devices. There is an important condition: you should have the skills to work with metal.

From Bulgarian

It is not difficult to make a home-made stationary circular saw at home. First of all, you should decide on the project, draw a diagram and make a drawing. The differences between stationary and desktop homemade circular saws are the height of the base. Before assembling the tool, you should think about creating a "table". It is usually made of wood (board thickness - 3 cm) and covered with tin or aluminum sheet. Also for these purposes, a steel sheet up to 6 mm thick can be suitable. Crossbars are made from a corner (up to 80 mm).

The working disk protrudes beyond the table, usually by 35%, that is, for a beam with a thickness of 120 mm, the diameter of the disk should be 370 mm, respectively. The power plant will need 1000 watts (possibly more). If the blanks are more massive, then a home-made circular may not “take” them. The emphasis is created from the “8” corner - this is a fairly massive and durable structure that can withstand quite significant loads. The emphasis extends beyond the boundaries of the table by 4-5 cm. One shelf is processed on both sides, the remainder in this case should be equal to the length of the table.

A very important node is the shaft - it is best to take it ready-made. If you have the skills to work on a lathe, then turning such a part is not very difficult. You will need to buy bearings with protection. The pulley is better to put V-belt. As an engine, a power plant from a refrigerator or washing machine may be suitable. Capacitors are usually installed in oil-paper.

After it was possible to assemble the machine from improvised means, it should be tested without any loads. All elements must "get used" to each other in order to work in a single complex. During testing, some flaws may appear, they will need to be eliminated. For homemade circular the engine from the washing machine can be ideal.

Such power plants operate from a 220 volt network, they have good efficiency and an acceptable rotation ratio. If you install a three-phase engine (it is powered by 380 volts), you will have to buy more capacitors to reformat the unit to 220 volts. Sometimes they use units with a gasoline engine - such power plants have good efficiency, are unpretentious during operation.

The most important element in homemade unit is the shaft. It can be carved independently from a metal ingot. It is not difficult to make such an element on a lathe. At the same time, it is important to observe the centering of the part, so that then there is no unnecessary vibration of the mechanism. Special grooves are machined on the shaft, where the saw blade and pulleys will be attached. Sometimes recesses are also machined for attaching knives. The size of the saw blade itself is directly related to the power of the engine. The diameter should be 3.5 times the thickness of the product. There are also verified calculations: for 110 mm of material thickness, an engine power of 1 kW will be required.

Craftsmen often make a circular saw along with a jointer on the same base. Both tools in this case can work from the same engine. The jointer is capable of deburring wooden surface to a mirror shine, its presence in combination with a circular is more than appropriate.

From a hand saw

It is also easy to assemble a circular saw from a hand saw. The sliding stop can be made from corners that are mounted on both sides of the rotating element (disk with teeth). The width of the slot is usually up to 5 millimeters. All edges must be processed so that they are slightly rounded. All corners are made with crossbars, which should firmly bind them. Bolts with nuts can be used as fasteners.

A metal clamp should be attached to the body. The screw tie is mounted at the bottom of the unit. The collar (thickness up to 2 mm) in conjunction with the rear rack is a single unit that can withstand significant loads. The stop is fixed in the back of the unit. The washers that create the gap can be moved by adjusting the size of the slot between the disc and the stop sides.

It is best to do the transmission with linorems - if a foreign object gets in, then when jammed, such pulleys will slip, which eliminates the possibility of injury. A pulley is placed on the engine with large sizes, a pulley with a smaller diameter is placed on the shaft for the circular - in this ratio, the optimal number of revolutions is achieved.

From a chainsaw

To make a circular saw from a chainsaw, you will need a metal canopy that will be mounted to the saw body. The engine is already available, so making the unit will not be very difficult. You will also need two channels with dimensions of 185x8000 mm. You will also need corners (55 x 100 mm) and two trimming rails that turn their soles up. Holes of 16 mm are drilled at the base of the sawmill, there should be a distance of one meter between them.

Ties are made from a pipe (length - 255 mm). The structure is fastened with bolts. Racks are made separately, the sawmill body will be attached to them. It is important to ensure that all elements do not have deformation. The distance between the racks should be no more than one meter. Then the sawmill is equipped with a movable carriage. It is made of a steel sheet 620x55 mm, corners are welded to the metal from below. Small bearings are mounted on the trolley. Two corners should also be welded at the top, a chainsaw is attached to them. Then a holder is made, which will work as a latch for a beam or log.

You will need a pipe with a diameter of 45 mm. To work, you will need a hose that will be mounted at a given height, which should not be greater than the length of the pipe itself. This is how a sawmill is made. It is possible to process on such a unit a bar or a log of any section.

From a drill

The drill is a versatile tool from which you can make such units:

drilling mini-unit;
lathe;
mower;
turbine.

Locksmiths in the service station even make winches from drills to lift quite bulky loads. The drill is also actively used in construction, in particular in painting work. Farmers often use a drill to install seedlings into the ground. The circular from the drill will be compact. To create a tool, you will need the following elements:

bases from a board 2-3 cm thick;
vertical supports;
shaft on which the disk is mounted;
electric drive in the form of a drill.

Instead of a board, you can also use chipboard sheets with a thickness of at least 30 millimeters. On such material, a rectangle measuring 310x255 mm should be cut. Also for the desktop you will need a duralumin sheet 5 mm thick. Such a material is good in that it has an acceptable stiffness coefficient and at the same time low weight. A hole measuring 165x12 mm is cut in the place marked with a marker.

The fasteners of the drill itself can also be made by hand. A saw shaft assembly can be easily found on any construction market. During operation, a lot of dust will occur, so you should look for a bearing with protection - this will significantly prolong the service life. A circular saw from a drill is assembled according to a standard algorithm:

all the main parts are attached to the base;
then the table is mounted;
the drill is connected, test tests are made.

The equipment requires compliance with safety regulations:

the place of work should be cleared;
the workpiece should work smoothly, without any delay;
the machine must be equipped with a protective screen;
garbage should not accumulate on the machine, it should be removed in time;
it is necessary to do a preventive inspection of the unit, to lubricate it.

Such mechanical device makes it possible to process not only wooden products. If you put good cutters, then you can work with non-ferrous metals, PVC, chipboard, bars.

Homemade fixtures

It is not so difficult to make a circular saw, problems can arise when fitting knots. Choosing the right elements so that they work flawlessly is an important task. The shaft must have self-adjusting bearings if the unit is used daily. The bearings themselves are best selected with two rows of balls that will be adjusted with a clamping nut.

The work surface must necessarily have a "grid"-markup. Without this coordinate system, accurate woodworking is quite difficult. Do not neglect the protective cover - during operation, it reliably protects the device from mechanical damage. Circular saw when working with various materials works in different modes, so it is desirable to have a device that controls such a process. Several grooves should be made on the shaft so that it is possible to rearrange the pulleys, thus changing the speed.

Parallel stop - a necessary device for working with overall workpieces. You can make them yourself from plywood, boards or chipboard. The stop value usually does not exceed 25 mm. The stop is fastened with self-tapping screws or bolts.

When you have to cut bars or make several cuts from different directions, you need an emphasis that has a “P” configuration. At its base lies a board 30 mm thick. Sidewalls 12 mm thick are screwed to the base. Thus, the stop is installed on a beam, the size of which from the point of the cut corresponds to the size to the cutting disc. From two sides, it is pressed against the beam with clamps. If the beam is too massive, then it is rearranged and another cut is made.

There is also an edge stop, which is in demand. To make it, it takes a lot of time and a good qualification of the master. Be sure to make a drawing diagram before starting work. This emphasis is made of plywood (20 mm), and the thrust bar is also made of this material. Production phases:

longitudinal grooves for dowels are cut;
dowels are mounted on a thrust bar;
between the grooves made, another groove is cut to secure the thrust bar;
another hole is made at the base, its size corresponds to the saw cutter of the circular saw;

Sidewalls-limiters are mounted, and there must be clamps in order to securely fix it. To put emphasis on the workpiece, the bar moves in the grooves and is fixed through the slot with clamps. It is best to immediately fix the ruler or tape measure on the bed - this makes the job much easier. The pusher is convenient for working with small workpieces - it allows you to fix the part on both sides, which ensures accuracy in work. It is also important to do:

elevator;
wedging knife;
lifting mechanism.

If a three-phase engine (380 volts) is placed on the machine, then capacitors that can withstand a minimum voltage of 620 volts will certainly be required. These devices may be paper-based.

Capacitors are calculated according to the following scheme: 1000 watts account for 100 microfarads for a working type capacitor. The capacity of the starting capacitor must be ordered twice as large. It should be remembered that the SB starting block is a device that automatically returns to its original position. This is very convenient, because literally in a matter of seconds after the start, you can start the workflow.

you can not work with wood in which there are metal fragments (nails, self-tapping screws, etc.);
material marking is possible only if there are special clamps or substrates (this is especially true for long boards and timber);
boards and timber from two meters long must be handled by two people;
when working with the disc, no sudden movements or shocks should be used, otherwise the device may jam, it may break;
if the material has dimensions from 42 cm, then it is recommended to use a special pusher;
if the wood is heterogeneous (there are branches and knots), then it must be dissolved before work;
gloves should always be used: both during operation and when cleaning the unit;
do not accumulate wood waste on the machine - this may cause a fire or a short circuit.

The machine must not be operated under the following circumstances:

no guide rail;
no casing;
too wide gap (from 10 mm);
there are no fuses (wedging cutter, holding fingers) that protect the worker from a broken workpiece;
the height of the riving knife exceeds the height of the saw blade (from 6 mm), the distance of its installation (17-110 mm).

The machine must have a chip collector. Be sure to wear protective goggles while working. When changing elements on the machine, it must be de-energized.

How to make a circular saw with your own hands, see the following video.

IN household often there is not enough circular saw, especially if started overhaul or construction. Not everyone can afford industrial products - they are too expensive. But you can make a circular yourself, using the materials that are available in the household.

Design - the main nodes, their purpose

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

adaptation of an existing hand tool, using the motor and circular saw for new possibilities;
improvement of industrial products to expand functionality;
assembly from separate parts, made mainly in-house.

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

The table serves for fixing woodworking mechanisms. It can be assembled completely from metal, which is preferable, especially for machine tools with a large engine. Wood also makes good circular tables. But it must be borne in mind that the countertop 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 a considerable load during work. The surface is made perfectly flat; protective shields must be installed above the rotating parts.

For a homemade circular, the engine from the washing machine is well suited. Portable tools are less suitable: their collector motors are designed only for short-term work. They have very high speeds, low efficiency, they are afraid of clogging. You can use a three-phase electric motor, but if there is no 380 V on the farm, you will need to purchase capacitors to make it work from 220 V.

The most responsible node is the shaft. Use ready-made, if available, or machined from round metal. Work on a lathe is performed in one setup, then, together with the working bodies, the centering is checked. Even the minimum beat is unacceptable, otherwise it will become stronger in work, 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 planer knives.

Basic parameters - calculation of power, revolutions, transmission

The characteristics of the saw blade, the engine and the maximum thickness of the lumber that can be cut are interrelated. On the purchased circular disk, the maximum speed for which it is designed is indicated. The number of revolutions transmitted by the engine to the shaft should be less. The power of the motor influences the maximum allowable sawtooth diameter. The diameter must be at least three times the thickness of the material, otherwise sawing will be difficult. It is believed that for sawing materials with a thickness of 100 mm, 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 is jammed, the belt slips on the pulleys. Traumatism in such cases is practically excluded. It is important to choose the right gear ratio. We take into account two indicators: engine speed and the maximum allowable number of revolutions of the circular saw. We calculate the required diameters of the pulleys. A pulley with a large diameter is installed on the engine, and a smaller one on the shaft for the circular to increase the number of revolutions.

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

Woodworking machine - a capital product for the home

For working with wood in large volumes, it is better to have a machine that allows you to cut the material, plan, choose a quarter. It takes enough powerful electric motor, hard table. We present a structure made of steel angle and sheet steel. It provides a cutting depth of 60 mm, it is possible to plan boards with a width of 200 mm. A three-phase motor 1.1 kW, 2700 rpm is used. Capacitors are required for connection to 220V.

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

The working 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 insufficient for comfortable work, the circular 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 rest of the sizes to fit them, but design features remain unchanged.

First, we make the bed frame from steel corners 25 × 25 mm. If we are not going to increase the height, we make another same lower frame. For a frame with a greater 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 slots for the motor 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. Tightening the studs, tighten the belts, then 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 °. In total, eight racks are needed - four on each side. We weld them to the frame with grooves located in a mirror image. We attach the crossbars to the outer racks. In the middle of each of them we drill holes, weld nuts. Threaded shafts will move along them to control the rise.

At the end, they rest against the racks welded to the drawers assembled from the corners of 75 × 50 mm. On the side, we weld the studs into them opposite the grooves for the adjusting mechanism. The table consists of two equal halves and is attached to the sides with countersunk bolts. The adjustment mechanism works like this:

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

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

Hand-held circular saw - turning into a stationary one

It is easy to make a stationary one from a manual circular saw, expanding its capabilities. The first thing you need is a table. Comfortable material Finnish plywood will serve, which, unlike ordinary plywood, is laminated - the blanks slide well over the surface during processing. It is thick enough to withstand a lot of weight, moisture resistant, and can be processed well. You can use ordinary plywood 20 mm, only it needs to be painted, and it is better to cover it with sheet steel or textolite.

It must be understood that the depth of cut will decrease by the thickness of the cover. You will need a large diameter disc so as not to reduce functionality compared to a portable tool. We make the dimensions of the countertop sufficient so that the workpiece fits in width. It should be added that an electric planer and a jigsaw can be additionally strengthened on a wide table, which will make the machine universal.

Using drawings and explanations, it is not difficult to make 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, process the edges. With the sole we apply a hand circular to the surface and mark the attachment points with a pencil. We make a slot for a circular saw. You can slightly deepen the attachment point using a cutter, but not more than 10 mm, so as not to weaken the countertop. This manufacturing method will bring the depth of cut closer to the circular saw indicated in the passport.

We make a frame (tsargi) from the boards, which we will install from below to strengthen the structure. We fasten four boards into a box, glue it to the countertop, securing it with clamps. Through the table we screw screws into the boards. The holes for them are countersinked on top so that the heads of the self-tapping screws are hidden. We fasten the legs to the sides of the stationary saw, preferably with bolts with washers and nuts. The table should be provided with additional rigidity, so we make spacers at the bottom of the legs.

We make a restrictive 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 a socket connected to the network on the drawer. In the break of the wire going to the saw, we mount the switch.

Some moments of the execution of home-made devices

No matter how well the circular is made, individual errors can lead to the fact that its performance will be limited. This concerns, at first glance, seemingly trifles. Let's start with the bearings for the shaft. The installation of conventional is justified if the machine is used from time to time. For homemade device with constant use, it is better to install self-aligning bearings. They consist of two rows of balls, adjustable by tightening the clamping nut. Install a cover to protect against dust, chips is mandatory.

On the working surface, we put a scale in centimeter increments. This will make it much easier to work with the tree when determining the width of the cut. Many neglect to install a protective shield over the disc, but in vain - treatment from chips getting into the eye or in more serious situations is more expensive.

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

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

We calculate the capacitance of capacitors based on the power of the electric motor: for 1 kW - 100 μF for a working capacitor Cf. We take the capacity of the starting Cn twice as large. Starting device SB is a button that itself returns to its original position. The start is simple: SQ is turned on, SB is pressed for a couple of seconds. After starting, the button is released, as soon as the engine picks up speed, you can cut.