In the household, a circular saw always comes in handy. Overhaul is a costly and troublesome business. Not everyone can afford to buy an expensive tool for processing wood materials. A hand-made circular saw allows you to perform safe work and speed up the construction process. A hand-made saw has a number of advantages, such as reliability, economy and sharpening for immediate needs.
A circular saw
Purpose of the circular saw
Before you start assembling the machine, you need to clearly define its purpose. A firmly fixed table with a saw slot is enough for harvesting firewood and simply cutting large pieces of wood. This type is common in villages and rural areas, the machines do not differ in safety and increased functionality.
For a more varied range of joinery jobs, you will need a better option. The circular must be equipped with a coordinate table with special guides, this allows you to change the degree. Manufacturing small items requires increased safety. Speed \u200b\u200bcontrol is set, disc change is provided.
Design features of the circular machine
Circulars of any fixed type consist of basic parts.
- Table for connecting mechanisms. An assembly compatible with larger motors is preferred with an all-metal table. The surface of the table must be made even with your own hands, for a better product at the output.
- In most cases, the engine is used from what is in stock. Electric motors designed for long operating time from the mains will be preferable to collector drives.
- The shaft is the most critical unit of the circular. Finished products are used most often; in other cases, the assembly is made on a lathe. It is important to calculate the bore holes, to exclude runout.
A table for a do-it-yourself circular saw can be used as a cutting machine. The cut cannot be more than 8 cm, so larger work will require a larger machine.
Stationary machine with your own hands
For everyday or one-time tasks, a do-it-yourself circular will do. Small sawing jobs do not put heavy stress on the disc drive. The compact tool has small dimensions, which makes it possible to remove it after the end of work in a certain place. For an experienced carpenter, you will need to make a large stationary circular.
A stationary circular saw made with your own hands will require accuracy, literacy from the master. Drawings provided in many types of literature will help in the manufacture. It is worthwhile to competently and tenderly treat each unit of the unit, because the circular is used at high speeds with a cutting tool.
Circulation table
Saw blade
The design of a do-it-yourself circular should contain a saw blade. The working surface of the disc is set at a third of the total diameter. For example, with a diameter of 210 mm, the disc should protrude 70 mm from the table. Parts with greater thickness will require a powerful motor, from 1 kW. A miniature circular saw cannot do this.
The splitting knife installed on some models serves to prevent short circuits and seizure during operation. Located at the rear a few millimeters from the saw blade teeth. The device may also be needed when making a circular with your own hands.
Adjustable side stop
Any type of work will require an emphasis. The side stop is made from a block of dense wood. In other cases, it is possible to manufacture from a metal corner. The location should be slightly longer than the table structure. The stop is installed using bolts. The template is installed between the table and the cutter, for accurate positioning, better tuning.
Shaft
Homemade shaft
The most critical part of the design is the shaft mounted on the circular. A do-it-yourself circular shaft can damage the structure and cause injury. The reason for this is the beating, which cannot be avoided when the shaft is made by handicraft methods. The production of the shaft should be entrusted to a specialist with good turning equipment. Remember to have a cutter that needs a seat. Holes must be machined and machined symmetrically.
Finished shafts are sold in specialized markets. Preference should be given to parts with a self-aligning bearing. Otherwise, the usual mechanism can soon render the circular unusable.
Broadcast
There are several types of gears that can be used in the design of a do-it-yourself circular:
- v-belt transmission;
- mechanism consisting of gears.
The preferred option is the use of a belt drive. Using a gear mechanism can lead to seizure by foreign bodies and injury to the worker. When choosing the pulley diameter, the maximum number of revolutions of the saw blade is taken into account.
Motor
Home-made machines are equipped in most cases with an engine from an old washing machine. The main features are increased service life and efficiency. The revolutions of such engines are not high, which makes working on a circular saw, assembled by hand, safer, longer, and has a positive effect on the result. The use of a special three-phase motor implies a 380 volt network. If one is not available, you will have to use a starting and running capacitor, which leads to additional costs.
Circular saw from a grinder or circular saw
When working with small workpieces, it is enough to do with small circulars. Circular, made by hand from an improvised power tool, you will need a "grinder" or a circular saw.
There are many options for the stationary use of an improvised tool. It is enough to fix the device at the bottom of the table to access the material to the disc. The height is adjustable depending on the workpiece, for safety reasons should not exceed one third of the saw blade size. This installation option is not available on the switch, it is necessary to redo the device for convenient operation.
A fairly common option is to use a bed on guides. The uncomplicated design allows the tool to be used at any angle. Consists of two parallel metal pipes or corners on which the saw is mounted.
The hand-made circular saw makes the job done faster and more economically. Such a device will be needed for major repairs and other actions related to cutting wood. The simplicity of the design, the ability to use improvised materials, make the cost practically zero, and making it by hand allows you to add the necessary functionality for work.
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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 unit 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 rate. 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.
The most important element in a 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 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 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 is 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 a 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 with a large size is placed on the engine, 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 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 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 the following 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 with a size of 310x255 mm should be cut out. Also, a 5 mm thick duralumin sheet is required for the desktop. This material is good in that it has an acceptable stiffness coefficient and, at the same time, low weight. A hole of 165x12 mm is cut in the place marked with a marker.
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 do a preventive inspection of the unit, make it lubricated.
Such a 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 gadgets
A circular saw is not so difficult to make, problems can arise when fitting knots. It is an important task to select all the elements correctly so that they work flawlessly. 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. A circular saw when working with different materials works in different modes, so it is desirable to have a device that controls a similar 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 you have to saw bars or make several cuts from different directions, you need a stop 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. From two 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 the thrust 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 fix the stop bar;
- another hole is made at the base, its size corresponds to the saw cutter of the circular saw;
The 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 accuracy 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, because literally in a few seconds after the start, you can start a workflow.
- you cannot work with wood in which metal fragments are present (nails, screws, etc.);
- the marking of the material is possible only with the presence of special clamps or substrates (especially 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.
For any home craftsman, having your own stationary sawing machine saves time and saves your work.
You can buy a ready-made stationary circular. The cost of small machines starts at 9,000 rubles, more or less decent stationary saws are sold in the price range from 30 to 100 thousand.
Despite the apparent complexity of the design, any craftsman with basic locksmith skills can make a homemade circular saw. Moreover, during the design process, it is possible to add functions that are not provided by the manufacturer.
What is a circular saw for?
Before starting work, it is necessary to determine the main tasks of the sawing machine. If you just need to cut firewood for the winter, or do basic carpentry work like making a fence, a sturdy table with a saw blade slot is enough. These options are popular in rural areas.
Circular for working with logs
Of course, there can be no question of any safety and functionality when using such a device.
In some of these "models" there is a shaft for securing the knives of a planer or jointer. As a rule, a frame is cooked from a corner or channel, an electric motor from the decommissioned factory ventilation is fixed on it, and with the help of a pulley, the torque is transmitted to the disk. It makes no sense to describe in detail the manufacturing technology of such a machine.
It's another matter if you want to do carpentry work. In this case, a coordinate table with guides that are fixed at different angles is required.
Since such a stationary saw can handle small workpieces, operator safety must be taken care of. It is desirable to provide for the regulation of the rotation speed and the possibility of easy replacement of discs with different diameters.
Be sure to install a protective cover over the disc, and cover the rotating parts of the drive with covers. The starting device is equipped with an emergency switch, and the stop button is located in an accessible place and is made large.
Don't miss in an accident
How to make a circular with a balance between economy, functionality and safety
Consider the main components that make up a home circular saw. You can make them yourself, but with certain skills and tools.
The frame can be made from a metal corner (channel) purchased from scrap metal collectors. If you have the means, contact the metal warehouse. It is permissible to make the legs from old water pipes, connecting them with corners.
A good option for a home-made frame made of rolled metal
IMPORTANT! The use of bolted connections is prohibited, as vibration will cause the fastener to loosen.
It is necessary to use electric welding. Be sure to reinforce the corner joints with a jib. The upper part of the bed (on which the table will rest) and the podium for the electric motor are made from a corner with a side of at least 50 mm.
If the machine is equipped with wheels for movement, they must be with steel rims and have locks. The higher the mass of the bed, the more stable the machine will be, and the safer the work will be.
The household often lacks a circular saw, especially if a major renovation or construction is 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:
- adapting existing hand tools using 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 well suited. Portable tools are less suitable: their commutator 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 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 - when 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. A sufficiently powerful electric motor is required, a rigid 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; 11 - 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 the 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 another similar 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 the 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. Finnish plywood will serve as a convenient material, 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 20 mm plywood, 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 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 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 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 below to strengthen the structure. We fasten four boards in 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 errors 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. The usual 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 in centimeter steps. 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 from 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. A self-made design, 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 people want to install a three-phase electric motor on the sawing machine without 380 V. You will need capacitors designed for a minimum operating voltage of 600 V of paper or oil-paper type.
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. The SB trigger is a button that automatically 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.
A hand-made circular saw is an excellent tool that allows you to solve a large number of household and other tasks. In fact, it is not difficult to make this device on your own, even in that situation, if you do not have any special skills, the most important thing is to understand at least a little the principle of processing metal alloys.
The materials needed for the job can be found in your home workshop or garage. So, circular from a circular saw do it yourself is made of the following elements:
- corner of strong steel;
- rectangular shaped pipe;
- engine.
The finished circular saw can be positioned on a workbench. If you don't have one, you will have to make the table yourself. The engine can be taken from an old walk-behind tractor or washing machine.
Circular from an angle grinder
If you have your own "grinder", it is very good. To create a "circular", you need to make an axial handle and a sliding stop to the unit. The design of the sliding stop includes a pair of steel angle pieces located on the sides of the saw blade. With the help of nuts and bolts, they are connected by a transverse bundle, and the gap between the working part and the sidewalls of the structure will be provided with washers.
On the "grinder", you need to pre-tighten the band clamp made of metal with a screw tie down. Then you need to attach the double-folded metal strip to the holes for the sliding stop. The stand and clamp can be combined, but in this situation the metal strip will be too thick.
Then, in the gearbox of the future tool, you will need to make several holes for the bolts. For this purpose, the body is disassembled, and the points where drilling will take place are indicated. With the help of the holes made, the axial handle is fixed, because the "standard" handle will not allow making a good cut, even if the master has very strong hands.
The handle is created from a metal tube or rod... Designs can be shaped like horns or braces. The ends of the element with which it will be attached to the gearbox must be provided with holes for installing fasteners.
You also need to make a barbell that will regulate the process. For this purpose, you need to take a piece of a metal rod, make a loop from one end of it, rivet it slightly and make a hole for the front stop bolt.
You need to make a thread from the other end of the rod, which will allow you to connect it to the handle. In advance, one strong nut should be screwed onto this thread, and after the structure is assembled, the second. By lowering and pulling them, you can adjust the cutting depth. By the way, if you use a drill instead of a grinder, you can make a similar tool.
Thus, you can independently make a good circular saw out of an ordinary grinder, with which you can cut various materials.
Compact benchtop machine
The above talked about how to assemble a hand circular. Now we will tell you how to turn this device into a stationary one. This process involves the manufacture of a U-shaped bed from a pipe, as well as the installation of a transverse arm. The lower ends of the structure should bend horizontally in the direction of the cut. They are bolted to the table. Stability is provided by additional supports.
Lever mobility provided by cutting the horizontal segment into two identical parts, which are fixed to each other with clamps. The saw blade is attached to the vertical frame element with clamps.
Stationary installation
A machine similar to factory models needs a competent attitude during the assembly process, so you need to take care of all the little things in advance. The desktop version of the "circular" differs from the stationary only in the height of the bed, which is determined by the peculiarities of work and the size of future blanks. One-time processing can be done with an ordinary table saw, which after work can be easily removed to the pantry or shed. But a master who constantly deals with wood will need a stationary installation. Therefore, he needs to make a table for a circular saw with his own hands.
The circular machine has the following advantages:
- Such equipment allows you to make better and deeper cuts.
- The machine is much more convenient than manual equipment.
From the foregoing, we can conclude that circular saws, made by ourselves, have a completely understandable and simple design, and the drawings that can be found on the World Wide Web will greatly simplify the process of assembling equipment. Before making a "circular" on your own, all the necessary elements should be considered separately in order to understand the nuances of the functioning and installation of homemade equipment.