Homemade circular saw. Do-it-yourself stationary circular saw. Video: making a circular 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 sawn timber. For such work, you will need a circular, which will not be difficult to complete from available tools. Such home-made equipment will not be inferior to purchased equipment 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, a power supply control unit, a tabletop 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 table top, which makes it easy to cut sawn timber, performing high-quality wood processing.

The tabletop can be made of lumber or use ready-made metal blanks for this. Flat easel tables are made of wood, from above, such a tabletop 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 during active operation will last for several years, 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 saw boards or firewood for the winter, then a simple installation from a sturdy table with a slot for a disc will be enough.

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

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

The advantages of homemade equipment

Homemade circulars are very popular due to their simplicity of 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.
Possibility of significant savings.
Equipment reliability and durability.

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

Features and power

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

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 in the use of technology. V-belt transmission, when foreign objects hit the saw, will slip on the pulleys, which eliminates injury and jamming of the working disc.

Circular production

Before proceeding directly to the manufacture of a circular machine, it is necessary to think over its device and design, and ideally, choose a drawing diagram, according to which all work will be performed in the future. When planning the manufacture of the bed, it must be remembered that such a structure must be stable and reliable... For production power saws, the base is made of reinforced welded steel structure. 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 operated from a single-phase mains or powerful industrial motors are used that operate from a three-phase mains.

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 on a single-phase network with a voltage of 220 volts, are reliable and capable of operating at high speeds.

One of the most important parts of an 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 router from round timber. Grind the shaft on lathechecking for perfect centering. Even minimal shaft runout is not allowed, since later 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 up to a third of its diameter above the worktop surface. Otherwise, at a higher saw height, it will be difficult to process wood, and work on such a machine will become simply dangerous. If you need to work with a bar, the diameter of the saw blade will be approximately 350 millimeters. For processing 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 a significant load will fall on the minicircular, poor-quality blades will quickly become dull and require replacement.

Materials and tools

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

In each case, the design of the circular will be different, therefore it is necessary to choose certain components, which will make it possible to manufacture functional and reliable equipment. When using lumber for the manufacture of the base and the work table, the wood will need to be covered with impregnations that protect the material from decay 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 sawn timber, which makes it possible to significantly simplify the manufacture, 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 the 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, involving the use of powerful electric motors, V-belt transmission and larger diameter saw blades. If you have any difficulties on the network, you can find thematic videos telling how to make a circular with your own hands.

The main component of a carpentry home workshop is a circular saw. It is designed for the primary processing of materials by manual or automated methods. 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 the 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 operational safety.

Before manufacturing, you must familiarize yourself with the basic requirements for its components. It is important that they fit together 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 disk rotation are power and number of revolutions;
additional components. These include stops for fixing a wooden blank, rulers for measuring.

The advantage of homemade 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 table height, tabletop dimensions, and electric motor characteristics. This is not the case with hand tools for woodworking.

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

Materials for making 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 products or use existing components.

The main problem is the choice of the power unit. Some people recommend installing a factory model hand-held circular saw. However, they often do not have the capacity to handle large volumes of wood. In addition, limiting the diameter of the disc 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 disc.

The connection of the load-bearing elements of the desktop is done by DIY welding. Mechanical components will not provide a proper indicator of reliability, since a backlash will form due to constant vibration.

table. For legs, you can use steel corners 30 * 30 or 40 * 40 mm;
table top. It is made of dense chipboard, although experts believe the best option application of steel sheet. In this case, a lattice structure is made at the top of the table;
electric motor. Any household model 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 disc. It is best to take the pulleys 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 move relative to the plane of the disc, thereby adjusting the width of the processed board with your own hands.

Before welding, all steel workpieces must be free 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 start assembling the structure using wood. Drawings are drawn up in advance, which indicate all the parameters of the elements: dimensions, welding places, zones of mandatory processing.

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

According to the scheme, a slot is made in the center of the tabletop through which the disc will pass. The edges of the material should be finished, but the table top should be flat. The plane of the disc must be strictly perpendicular to the table surface. Recommended slot sizes: 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 entering electrical components.

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

A hand-held electric saw is a useful and convenient thing, but working with it will not work for a long time, since you need to make efforts. If you need to cut a whole tree or you constantly have to work with large volumes, then for this, a circular is made from a circular saw with your own hands.

In contact with

Advantages and features of the tool

The 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 the soft metal. To make a complete tool for work, you need to set it on the table and provide an approach from all sides.

In this case, the following conditions must be observed:

the table must be well strengthened, for which its legs are sometimes poured with concrete or screwed on with bolts;
the hand saw is fixed with iron brackets to the table top to ensure safety during work;
grounding required.

Inconvenience when working 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 working surface is not static, then the quality of the cut deteriorates, therefore fastening is necessary. The cable can be secured with brackets in the floor so that you do not accidentally trip over when working.

Alternatively, make an additional socket under the table top.

First you need to prepare a drawing indicating the dimensions. This is almost a drawing, but simplified. On paper, you need to indicate the size of the gap for the disc - 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.

Necessary accessories

Additional tools you will need:

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

In the process of work may need a router.

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 by slats, or a ready-made sawing table, iron or wooden, can be used.

Chipboard prices

Description of the workflow

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

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

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

To do this, you need to pick up two pieces of pipe, you can use aluminum square profile different sizes... The pipes must be cut vertically with a grinder. You should get a construction according to likeness railswhen one part fits into another.

Next, you need to measure the piece along the length of the table. Pre-cut the recess and fit the profile into it, securing it with bolts from the bottom side. The smaller profile is cut to the length of the sole and bolted on. The edges of the metal should be sanded so that they do not interfere with smooth movement. All that remains is 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 board, 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.
Bolt the tabletop onto the table legs; for fidelity, you can use wood glue.
Level the upper part with a spirit level, fix it to the floor with metal brackets or pour concrete.

Important!The table top is installed on the legs after the saw is secured.

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

Prices for MDF

Description of work:

Turn the tabletop over, mark with a marker and cut a hole for the disc.
Cut the top layer according to the shape of the sole to a depth of 0.7 mm.
Take two bars and fix the sole parallel to the length of the table with screws.
Fix the sole perpendicular to the table with two more slats.

The attachment of the circular saw to the workbench is now complete. If permanent work is planned, then you can equip the table with an additional emphasis. This requires a flat bar along the length of the countertop. It must be installed parallel to the saw blade, preferably in a recess, and secured with bolts. It is important to align the part well so that it is located strictly parallel - the quality of the cut will depend on this, especially if you need to make furniture.

Shaft making

How to make a shaft for a circular with your own hands.

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

It is unsafe to make this important part from old pipes, since the disk itself will be attached to the shaft.

Diy circular saw shaft hard to do... Here you need a professional turner, preferably not a beginner. First you need to select a special 45 grade steel. The material is durable and resilient, specially designed for the manufacture of shafts, cylinders, gears.

For turning on a lathe, a double-sided mount is used. The part is processed first with a conventional cutter to give required diameter... Next, a finishing cutter removes all seizures. A small allowance is left for the final sanding with sandpaper to a mirror finish.

Shaft grooves are performed with a groove cutter, as indicated in the drawings. In the process of work, you can remove the part and try on components on it, which will subsequently be mounted.

The shaft can be fitted with fasteners for:

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

A homemade circular saw with your own hands is equipped with a motor from an old washing machine. It is necessary to connect a starting device corresponding to the engine power.

When installing electricians must be observed safety regulations:

Provide thermal protection for overvoltage cases.
The electrical panel must be installed on a material that is non-conductive.
If a metal frame is installed, the wiring should be well insulated.
If a homemade machine with a circular saw outside, the electrical unit must be protected from water ingress.

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

For working with plexiglass, plastic, laminate, a mini-circular can be useful - a small design similar to a stool center discat.

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

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

For an emphasis, you can attach a beam with a height of 2 cm.

The legs do not need to be reinforced because the device is to be moved.

Note! The device copes well with thin soft materials, but wood gives in with difficulty, to work with it you need to increase the motor power.

The motor power on the microcircular is small - up to 40 W. The disc 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 pin. The disc is fastened with a nut screwed onto the thread.

Other accessories

Various accessories for a hand-held circular saw with your own hands are easy to do. 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, since it is designed for a certain width, different for each model. To be able to increase the gap, it is required to insert between the wall of the stop wooden detail necessary width and push in her in the sole.

You can make a groove cutter that can be useful when making furniture.

A circular saw from a hand-held circular saw can be adapted for miter cuts. Both additional parts and the ability to fix the disc itself at the desired angle are used.

Simple trimmer with hand-held circular saw. It is possible to saw at a given angle.

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

The end saw cut is used in construction to decorate walls with wood, which are subsequently varnished, leaving visible the transverse structure of the tree.

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

For arranging circulars, old hand saws are suitable, possibly with an inoperative motor. Construct workplace can be done according to any scheme. Having picked up parts in terms of 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 at no extra cost.

Video: making a circular from a circular saw

A circular saw is required in a private household 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 available tools.

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.

From the nodes you will need:

engine;
bearings.

You can't do without tools and materials in your work:

jigsaw;
impeller;
screwdriver;
screwdriver;
scotch;
a hammer;
nippers;
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 skills in metalwork.

From the grinder

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

The working disc protrudes beyond the table usually by 35%, that is, for a 120 mm thick bar, the disc diameter should be respectively 370 mm. The power plant will need 1000 watts (possibly more). If the blanks are more massive, then a homemade circular may not "take" them.The stop is created from the corner "8" - this is a rather massive and durable structure that can withstand quite significant loads. The stop extends beyond the table by 4-5 cm. One shelf is processed from both sides, the remainder in this case should be equal to the table length.

A very important knot 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. It is better to put a pulley with a V-belt. A power plant from a refrigerator or washing machine can be used as an engine. Capacitors are usually installed oil-paper.

After the machine has been assembled from available tools, it should be tested without any stress. All elements must "get used" to each other in order to work in a single complex. During the testing process, some flaws may appear, they will need to be eliminated. For a homemade circular, an engine from a washing machine may be ideal.

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

A critical element in homemade unit is the shaft. You can carve it yourself 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 turned on the shaft, where the saw blade and pulleys will be attached. Sometimes recesses for attaching knives are also grinded. 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 proven calculations: for 110 mm of material thickness, an engine power of 1 kW will be required.

Craftsmen often make a circular saw together with a jointer on one base. In this case, both tools can work from the same engine. The planer is capable of cleaning wooden surface to a mirror finish, its presence in combination with a circular is more than appropriate.

From a hand-held circular saw

It is also not difficult to assemble a circular from a hand-held circular saw. The slide stop can be made from corners that are mounted on both sides of the rotating element (disc with teeth). The slot width 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 and nuts can be used as fasteners.

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

The transmission is best done with liner belts - if a foreign object gets in, then when jammed, such pulleys will slip, which eliminates the likelihood of injury. A pulley is placed on the engine with large size, a pulley with a smaller diameter is placed on the circular shaft - 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 it will not be very difficult to make the unit. You will also need two channels with dimensions of 185x8000 mm. You will also need corners (55 x 100 mm) and two trim rails, which turn with the soles up. At the base of the sawmill, holes of 16 mm are drilled, there should be a distance of one meter between them.

Screeds are made from the 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 monitor that all elements do not deform.The distance between the posts should be no more than one meter. Then the sawmill is equipped with a movable carriage. It is made of steel sheet 620x55 mm, corners are welded to the metal from below. Small bearings are mounted on the bogie. At the top, two corners should also be welded, a chainsaw is attached to them. Then a holder is made, which will work as a retainer for a bar or log.

You will need a pipe with a diameter of 45 mm. For work, you will need a hose that will be attached at a given height, which should not be more than the length of the pipe itself. Thus, the sawmill is made. A bar or a log of any section can be processed on such a unit.

From a drill

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

drilling mini-unit;
lathe;
mower;
impeller.

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

bases from a board 2-3 cm thick;
vertical supports;
the shaft on which the disc 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 of 310x255 mm should be cut out. Also, for the desktop, you will need a duralumin sheet 5 mm thick. This material is good in that it has an acceptable stiffness coefficient and, at the same time, low weight. In the place marked with a marker, a hole of 165x12 mm is cut.

The fasteners for the drill itself can also be made by hand. The saw shaft assembly can be easily found on any construction market. During operation, a lot of dust will arise, 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 the standard algorithm:

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

The equipment requires compliance with safety measures:

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;
you should make a preventive inspection of the unit, make it lubricated.

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

Homemade gadgets

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

The working surface must have a "grid" -marking.Without this coordinate system, precise woodworking is quite difficult. The protective cover must not be neglected - 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.

The parallel stop is a necessary device for working with large 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 screws or bolts.

When it is necessary to saw bars or make several cuts from different directions, an emphasis is required that has the "P" configuration. At its base is a board 30 mm thick. Sidewalls 12 mm thick are screwed to the base. Thus, the stop is installed on a bar, the size of which from the cutting point corresponds to the size to the cutting disc. On both sides, it is pressed against the timber with clamps. If the bar is too massive, then rearrange it and make another cut.

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

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

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

elevator;
riving knife;
lifting mechanism.

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

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

you cannot work with wood in which there are metal fragments (nails, screws, etc.);
marking the material is possible only if there are special clamps or substrates (this is especially true for long boards and beams);
boards and timber from two meters long must be handled by two people;
when working with a disc, sharp movements or jolts should not 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 dissolve it necessary before work;
always use gloves: 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 (riving cutter, retaining fingers) that protect the employee from the workpiece that has fallen off;
the height of the riving knife is greater than the height of the saw blade (from 6 mm), the distance of its mounting (17-110 mm).

A chip collector must be present on the machine. When working, be sure to wear protective goggles. When changing elements on the machine, it must be de-energized.

For information on how to make a circular saw with your own hands, see the next video.

IN household often there is not enough circular saw, especially if major repairs or construction are started. Manufactured products are not affordable for everyone - too expensive. But you can make a circular yourself, using the materials that are available in the household.

Construction - main units, their purpose

A stationary circular saw with your own hands is created with advancement in several possible directions:

adaptation available hand toolusing a motor and a circular saw for new possibilities;
improvement of industrial products to expand functionality;
assembly from individual parts, mainly manufactured 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 fixing woodworking machinery. It can be assembled entirely from metal, which is preferable, especially for machines with a high power motor. 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 considerable workload. The surface is made perfectly flat; protection shields are required over the rotating parts.

For a homemade circular, an engine from a washing machine is not bad. Portable tools are less suitable: their collector motors are only designed for short-term operation. They have very high speed, low efficiency, they are afraid of clogging. You can use a three-phase electric motor, but if the farm does not have 380 V, you will need to purchase capacitors so that it works from 220 V.

The most critical unit is the shaft. Use ready-made, if available, or grind from round metal. The work on the lathe is performed in one setting, then the centering is checked together with the working bodies. Even a minimal runout is unacceptable, otherwise it will become stronger in work, at which work is unacceptable. There are seats on the shaft: for a circular saw and for pulleys on the other side. You can also make grooves for planing knives.

Basic parameters - calculation of power, rpm, transmission

The characteristics of the saw blade, the motor and the maximum thickness of the lumber that can be cut are interrelated. On the purchased circular disc, the maximum speed for which it is designed is indicated. The number of revolutions transmitted by the motor to the shaft should be less. The motor power affects the maximum permissible diameter of the serrated saw. The diameter must be at least three times the thickness of the material, otherwise it will be difficult to cut. It is believed that for cutting materials with a thickness of 100 mm, a motor of at least 1 kW of power is needed.

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

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

Woodworking machine - capital product for the home

For work 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, you can plan boards 200 mm wide. A three-phase motor 1.1 kW, 2700 rpm is used. Capacitors are required to connect to 220V.

1 - machine frame; 2 - panel; 3 - starter; 4 - device for height adjustment; 5,7 - a desktop of two halves; 6 - base; 8 - engine; 9 - platform; 10 - studs M10; eleven - circular disc; 12 - shaft; 13 - stops of the lifting mechanism; 14 - driven pulley; 15 - belt; 16 - a driving 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. The length and width can be increased, the height can be increased up to 1200 mm. The rest of the dimensions are adjusted to fit them, but design features remain unchanged.

First, we make the frame of the bed from steel corners of 25 × 25 mm. If we are not going to increase the height, we make one more same lower frame. For a frame with a higher height, first weld four legs from the same corners to the upper frame, and then we strap them at a height of 15–20 cm from the bottom. The lower frame has slots for the engine deck retaining bolts. Two studs are welded to the rear side of the platform, extending into the holes on the back of the lower frame. Tightening the studs, we tighten the belts, then we stop 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, you need eight racks - four on each side. We weld them to the frame with grooves located in the mirror image. We attach the crossbars to the outer posts. Drill holes in the middle of each of them, weld nuts. The threaded shafts will move along them to regulate the lift.

At the end, they abut against racks welded to the side bars assembled from corners of 75 × 50 mm. On the side, we weld the studs opposite the grooves for the adjusting mechanism. The table consists of two equal halves; it is attached to the side bars with countersunk head bolts. The adjusting mechanism works like this:

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

The design can be simplified by not installing an adjusting shaft. Raise and lower the table manually. If you assemble a table not from two halves, but solid, you only need four stands for the lifting mechanism.

Hand-held circular saw - converted to stationary

It is easy to make a stationary saw from a hand-held circular saw, expanding its capabilities. The first step is to need a table. Comfortable material Finnish plywood will serve, which, unlike ordinary plywood, is laminated - the workpieces slide well on the surface during processing. It is thick enough to withstand a lot of weight, moisture resistant, and easy to process. 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 should be understood that the depth of cut will decrease by the thickness of the cover. A large diameter disc will be required in order not to reduce functionality compared to a portable tool. We make the dimensions of the tabletop sufficient so that the workpiece fits in width. It should be added that an electric plane and a jigsaw can be additionally strengthened on a wide table, which will make the machine universal.

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

We mark out a rectangle of the required size 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 tabletop. This manufacturing method will allow you to bring the cutting depth closer to the circular saw specified in the passport.

We make a frame (drawers) from the boards, which we will install from the bottom to strengthen the structure. We fasten four boards into a box, glue them to the tabletop, securing them with clamps. Screw the screws into the boards through 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 side bars 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 limiting 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 tsarga. In the break of the wire going to the saw, we mount the switch.

Some moments of the execution of self-made devices

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

On the working surface we apply a scale with a step of a centimeter. This will make woodwork much easier when determining the width of the cut. Many people neglect to install a protective shield over the disc, and in vain - treatment for chips in 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 construction, as a rule, does not have the ability to regulate the engine speed. There is only one way out - the use of pulleys of various diameters. They are installed 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 wish to install on sawing machine a three-phase electric motor without 380 V. You will need paper or oil-paper type capacitors rated for a minimum operating voltage of 600 V.

The capacity of the capacitors is calculated based on the power of the electric motor: for 1 kW - 100 μF for the working capacitor Cf. We take the capacity of the starting Cn twice as much. Starting device SB is a button that itself returns to its original position. The launch is simple: SQ turns 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 saw.