Blogger Egorov decided to make a bench from trimmed birch logs. The idea is generally not new. The only novelty is the method he used to make an even cut on the log. In this case, improvised means were used.

He created the simplest sawmill from a chainsaw, two boards and 6 screws. Perhaps he is not the first who has already made such a device, but there is currently no material about it on the Internet. It is not clear why no one makes such devices, but uses complex attachments.

A small, low-power chainsaw with a short bar was used. It is impossible to cut lengthwise with such a saw. The solution is obvious: either saw by eye, which is unsuitable for carpentry work, or make an alternative design using the tire mounting cover, which is parallel to the plane of the tire.

For this, 2 boards were taken, using self-tapping screws, a corner was made from them, which was screwed to the log. A chainsaw was placed on the corner. A wonderful even cut of the log was made along this unique guide.

The main work is done. Now you need to prepare 4 platforms for holes for attaching the legs on the cylindrical part of the block, make holes and insert 4 legs. For greater stability, you need to drill these holes at an angle. Twist drill with a diameter of 52 mm.

To prevent the legs from drying out and falling out over time, they need to be dried for several days and placed in the holes extremely tightly.

The second block can be used as a backrest.

Homemade sawmill from a regular chainsaw

A simple device for cutting round timber yourself is a chainsaw sawmill. Any DIYer who knows how to use a welding machine can make such a device.

The resulting device is easy to use, but regular chain sharpening will not work. But more on that at the end of the article.

The sawmill consists of the following components:

As you can see, the device is simple - let's start making it!

First of all, we make a frame with guides. Its dimensions:

We cut out the bed platform from sheet material and make a hole for mounting on the saw

Guides are made from steel water pipes. We weld them to the frame strictly at right angles.

We boil everything thoroughly

Drilling holes for saw bar clamps

To fasten the frame, we replace the standard nuts (in the middle) with elongated ones with welded washers.

We twist and fix the frame

We make clamps for tires. All sizes are in the photo below

The clamp is not difficult to make, it consists of profile pipe and pressure plate. Clamp assembly

This is how the clamp works

We make a carriage. It is necessary in order to smoothly slide along the guides and lock in a given position. It sets the thickness of the future board. This is what the carriage looks like

The carriage consists of a round and rectangular pipes. We saw the pipes in half

From the rectangular one we select grooves for the round one, and assemble it on the guides

Scald

This is how the clamp is attached to the guides. The bolts are relaxed, the distance is set and tightened.

We make a support platform. It slides along the log and creates a supporting plane.

Support area dimensions

We make blanks according to size, place them on a flat surface, and try on the saw blade.

We weld and clean the seams

For ease of use homemade sawmill– you need to make a handle. We make a handle from a pipe. For easy bending, we burn the pipe at the bending point. blowtorch

We bend according to the template

This is what the support platform with a welded handle looks like

We weld the support platform to the carriage. It is necessary to maintain the same planes of the saw bar and the support platform. To do this, lay an even, tight gasket. Chipboard is ideal.

We weld the parts. To strengthen it, it is necessary to weld the stiffening corners

Assembling the device

The device for a manual sawmill using a chainsaw is ready!

To obtain lumber, logs are cut, that is, divided along the axis into parts using saws for longitudinal sawing (frame, round and band). In this case, sawing is carried out either with one saw or with a group of saws.

In the second case, at least two saws are involved in the work, sometimes their number is increased to 16...20. This method is called group sawing. Group sawing is typical for sawmill frames, less often for circular saws.

If during sawing only one cut is made and only one part of the log is separated, such sawing is called individual sawing. This method uses band saws or circular saws.

Individual sawing allows for better use of wood, taking into account the characteristics of different parts of the log.

Group sawing is used for raw materials of small and medium diameters, homogeneous in structure and of low value (coniferous and soft hardwood).

The cuts in the log can be located either parallel to the wood fibers, which corresponds to the direction of the log generatrix (along the run), or, most often, at some angle to the direction of the fibers and parallel to the axis of the log (typical for group sawing).

In relation to the annual layers, the cuts can be radially directed, tangential to the annual layers, or occupy an intermediate position.

Sawing with a strictly defined direction of cuts is called oriented. Oriented sawn timber receives various additional properties (radial sawn timber – improved quality). The direction of cuts can be a significant additional factor that improves the quality of lumber. The highest yield of oriented sawn timber can be obtained using an individual cutting method.

The choice and justification of one or another method of sawing round timber is determined by economic indicators. The most important of them is the yield of the final product.

The yield of sawn products is understood as the ratio of the volume of products received to the volume of raw materials spent on it:

where is the yield coefficient of finished products;

Lumber yield percentage;

Volume of products obtained from raw materials;

The volume of raw materials spent on the production of a given product.

The cutting of logs into lumber is carried out by a set of cuts. It can be easily represented by the projection of a log onto a plane perpendicular to the longitudinal axis of the log. We take the log to be a regular geometric body rotating around an axis.

The main methods of cutting timber into sawn products (Fig. 5):

camber;

timber (timber-camber);

segmental;

sector;

circular.

Sawing with the camber method is carried out with cuts parallel to the planes, unedged boards are obtained, while the middle ones are radially sawed; the extreme lateral ones are tangential, the rest are mixed, slabs and technological chips. Tumble sawing is used to obtain edged boards relatively short lengths, blanks for producing edged boards of thin logs, since other methods provide a strong reduction in the width of the boards.

It is typical that when cutting unedged boards that occupy the same place in the cutting pattern, the practical width of the board will be different (the so-called “scattering”) due to the irregular shape of the logs, inaccuracy in cutting the boards and the selection of logs in the supply.

Rice. 5. Methods of cutting logs: 1 - camber; 2 - timber-camber; 3 - segmental; 4 - sector; 5 - circular

For this reason, it is difficult to fulfill orders for lumber of a given width.

Sawing using the timber method is carried out as follows: first, a double-edged beam and side boards are cut out of the log. Subsequently, the resulting timber is cut into boards, and all middle boards are clean-edged of the same width, equal to the thickness of the timber. Subsequent processing of unedged boards is carried out by analogy with break-up boards.

Since the number of edged boards from one log is 65...70% of the volume of all boards, orders for lumber of a certain width are easily fulfilled.

The beam-breaker method allows you to produce products with a high degree of completion (40% of lumber is edged) and a higher quality yield of lumber compared to the breaker method.

The segmental method is that a beam or several boards are cut from the middle part of the log, and on the sides two plates are obtained, having cross section segment type. Subsequently, the segments can be sawn in various ways to produce predominantly radial or tangential lumber.

The segmental method for producing radial lumber is widely used to produce resonant lumber with a log diameter of 30 cm.

Sawing using the segment method can be carried out using both group and individual methods. When sawing each segment separately, good cutting quality is obtained, since there is a base surface in the form of a plane.

With the sector method, the ridge is cut into four or more parts, each of which has the shape of a sector in cross section. With the group method, four sectors are cut out, with the individual method – more.

The sector and segment methods are very labor-intensive and are characterized by a large amount of wood waste, so mixed cutting methods are used.

The circular cutting method is characterized by turning the log around its longitudinal axis, which can be carried out after each cut of the next board. Each subsequent cut can be directed either parallel, or perpendicular, or at an angle, most often perpendicular. Obviously, the circular method is only possible with an individual cutting method.

All methods have fundamental differences. Each method determines the appropriate technology and equipment and is intended to produce lumber of a specified type, size, and purpose.

Choosing the correct, most appropriate, technically and economically sound sawing method is an important task in the technology of mechanical wood processing.

The criterion for the efficiency of cutting logs into sawn products is the volumetric yield.

Volumetric yield (O, %) – the degree of wood use without taking into account the size and quality of lumber products:

where is the volume of lumber produced, m3;

Volume of raw materials consumed, m3.

Boards are actively used for various construction and repair activities. This material can be made independently from any suitable log using a regular chainsaw.

Chainsaw - a universal summer resident tool

A chainsaw, often also called a chainsaw, is a chain saw hand tool equipped with a two-stroke (in most cases) engine internal combustion. This popular mechanism is indispensable in any homestead. The chainsaw is compact and yet powerful. It works without breakdowns for a long time in autonomous mode, due to which it can be used in any location and in a position convenient for the user. The chainsaw has other advantages:

• Equipped with mechanisms for selecting operating speed and smooth starting. This reduces the risk of chain breakage to a minimum.
• Can be used in high humidity conditions.
• Does not require electrical energy.
• It is characterized by high power indicators (noticeably greater than those of a power tool).
• Has a quick-acting inertia brake.

Main advantage gasoline saw– the possibility of equipping it with various attachments. It is they who make it universal, indispensable for home handyman, tool. Using a chainsaw, you can saw logs, cut stone, metal, brick, tiles building materials, removing bark from wood, cutting out mounting grooves and various recesses in the bars.

The functionality of the tool can be expanded even further, the main thing is to choose the right attachment or equip it with a special device.

We will not describe all the capabilities of the chainsaw. In this article, we are only interested in the issue of sawing logs using a chainsaw. More on the features of doing such work with your own hands.

Attachments and accessories for sawing – the home craftsman will appreciate them!

Cutting a log with a gasoline saw can be done after it has been completed different types devices and special attachments. Get relatively smooth boards from the trunk of an old dried tree on your summer cottage It’s not difficult if you install a standard attachment for longitudinal cutting of wood on your chainsaw. Important point. You won't get perfect boards when using this attachment. But the cut products can be used to build a fence around the site or a simple shed.

It will be easier to cut a log more efficiently if you add a holding device to the nozzle wooden blank and guide. You need to mount a metal frame on the saw bar. It is sold in construction stores. If you wish, you can actually make it yourself, using legs from an old school desk or ordinary metal corners. The distance between the tire and the frame is adjustable. Due to this, it becomes possible to saw logs into boards of different thicknesses.

If the tool will be used stationary, the chainsaw guide is made of smooth wooden block either from metal profile. It should be as tough as possible. The ends of the homemade guide are mounted on sawhorses. And then a log is placed under this structure for sawing. The process of processing it will occur quickly and without unnecessary labor costs.

It is worth noting that the described technique is used exclusively for cutting trunks of small length. If you take a longer log, the guide will begin to sag. As a result, the trunk cannot be cut efficiently and evenly.

We take a log and get boards from it!

Impeccably even cutting is obtained by using a leading ruler (a special guide is often used instead), which is usually called a straight template. It essentially represents small machine, recommended for cases where work with wood is carried out more or less regularly. Such a miniature sawmill for longitudinal sawing has a cost of 10 thousand rubles. If you use it “once every hundred years”, it is better to do as described above.

Both the factory device and the DIY design cut logs according to the same pattern. Longitudinal cutting is carried out using a special chain. Finding her can be difficult. But there is a way out. Sawing trunks lengthwise can be done with a regular chain. You just need to carefully sharpen it at a 10-degree angle. Important point! The tool quickly loses its original sharpness during use. Therefore, it must be constantly sharpened so that cutting logs into boards does not cause difficulties, and the geometry of the resulting products meets the stated requirements.

Sawing logs into flat boards with a chainsaw equipped with a device is performed as follows:

1. 1. Take two straight and strong boards. Connect them at right angles to each other. The result is a reliable straight template.
2. 2. Make simple supports from wooden blocks. Use them to support the template you made.
3. 3. Place the barrel on the device.
4. 4. Fasten the frame to the tire, attach the supporting elements supporting the leading ruler to the ends of the log. Last operation Requires horizontal installation. Use a building level for control.
5. 5. Secure all existing elements with self-tapping screws. Some craftsmen use nails for these purposes, which is undesirable. After cutting the logs into boards, you will have to remove the used fasteners. It will be difficult to do this without significant damage to the structure.
6. 6. Fix the template to the supports and adjust its height. Nuance. The cut will go somewhere 10 mm above the level of the ruler, and not strictly along it. Take this into account when adjusting the height.
7. 7. Rotate the log. Turn on the chainsaw. You make the first cut.

Then you need to free the log from the stops and boards, fix the template on the cut surface so that it faces in the direction of the second cut. The ruler can be attached with supports to the ends or directly to the surface of the barrel. Make a second cut. In relation to the first, it will be perpendicular.

Next, turn the log and fix it. The ruler can be removed. We will carry out further sawing without it - one of the cut sides of the trunk will serve as a guide. You need to adjust the thickness of the cut on the frame, saw off the log to get a beam with bark on only one side. Now turn the barrel again. Set up the frame. You carry out the final sawing and get the boards at your disposal. If their width is not important to you, there is no need to cut the trunk to fit the timber. Simply saw the workpiece to the middle, turn it 180°, then continue the operation you started.

We cut the trunk across - there will be no difficulties!

As you can see, longitudinal sawing with a chainsaw is a rather labor-intensive process. If you want to get logs by sawing the trunk crosswise and then make boards from them, the operation will be impractical due to the large expenditure of effort. Most often, cross cutting is used when it is necessary to make country wood outdoor furniture- tables, benches, small benches. It is also recommended for preparing firewood and for decorative design using sawn logs. In such situations, logs are cut into disks of small thickness (up to 15 cm).

The cross cutting process is as follows:

1. 1. Place the trunk on trestles 70–80 cm in height (they should be as stable as possible).
2. 2. Remove the bark from the wood, if any.
3. 3. Make a small cut. It will play the role of a guide groove.
4. 4. Rotate the barrel being processed 90°. The tire of a power tool must run strictly along the intended groove.
5. 5. If you need logs, make notches on the tree with an ax.
6. 6. Sawing the trunk.

Transverse and longitudinal cutting of logs must be carried out in compliance with safety standards. It is advisable to carry out work in thick clothing, gloves, glasses, and headphones. Prepare a first aid kit in advance - a chainsaw is a potentially unsafe tool that can cause serious injury to a person. Always move the saw forward along the guide and do not try to push it harder. The tool should move freely.

The chainsaw must not be raised above the shoulders. The tool must only be run on the ground. In this case, the chain brake must be in the engaged state. Its release is carried out just before the start of cutting logs. Do not fill the gasoline container if the saw has recently been used. You should wait until the tool and fuel tank cool down. Take care to carry out work safely. And then sawing up tree trunks on your own will not lead to dire consequences. Good luck.

Centuries and millennia pass, new materials and technologies appear, but wood, stone and metal have been and remain the main materials used by humanity for its needs. Products made from them surround us everywhere, wherever we are, wherever we go.

Particularly noteworthy is the wood, which creates an atmosphere of coziness and comfort everywhere. Metal and stone are colder and more laconic, but wood is even warm to the touch. Therefore, the first two materials are used more often in the form load-bearing structures, and wood in interior decoration, however, after being brought into the appropriate form.

Before you cut a log correctly, you need to inspect it. If on outside There are no significant flaws in the tree, then processing can be done quickly and with virtually no loss of wood.

Logs must be sawed in such a way that the resulting materials have equal density. And to do this, you need to remember that the wood on the north side of the trunk differs more high density than in the south. Cutting a log lengthwise begins with removing the slab; this part is removed from both sides of the tree to create a beam that will not roll.

We place the resulting timber on one cut side, and the other looks up, and the cutting will begin from there. Now you can cut the remaining log into appropriate lumber or boards of equal thickness. The result is a set of unedged boards, in which the raw edge (sometimes even with tree bark) must then be cut with a handsaw. Now we can consider the work completed.

How to saw a log lengthwise - disappointing realities

All these recommendations are good for ideal logs, but, as you know, ideal is quite rare. Basically, almost all logs have various shortcomings, and you have to adapt and invent cutting methods in order to avoid wood loss and get as much wood as possible quality material.

As in the previous case, Before sawing a log lengthwise, you need to remove the slab from it. For those who don’t know, a slab is a board that has one sawn surface, and the other either is partially processed or is not touched at all.

After removing the slab, the next step is to unedged board, this has already been written above. Longitudinal cutting of a log produces boards, but with raw edges. In the process, because the log is not perfect, it is necessary to periodically turn it over and identify it best options further use. Sometimes, while cutting one log, you have to turn it 180 degrees several times to minimize defective boards.

If it is possible to obtain good quality material from the other side of the log, you need to continue the process from there and so on until the wood is completely used.

Very often, after cutting, timber remains; it can also be used on slats, boards, or used in its original form.

Features of mechanisms for processing logs

Many private developers have a question: how to cut a log lengthwise with a chainsaw? To perform this operation, experts recommend that you first secure the log and only then carry out processing. In addition, in order for the cut to be as even as possible, the chain of this saw must be well sharpened so that it does not move to the side, or buy a special chain designed for longitudinal cutting.

In addition, it is advisable that the logs are not long, because It is very difficult to make something high-quality by hand from a long workpiece. also in construction stores Special attachments for logs and saws are sold, which are called mini-sawmills; they allow you to do work at home quickly and efficiently. The only drawback Such equipment is due to its high cost.

Act upon use hand saw necessary in the same way as when processing with a sawmill. The slab is cut off and the remaining log is cut into longitudinal boards, from which the raw side edges are then separated. Only the main difference when working with a saw is the increased complexity, because you need to maintain a uniform thickness of the board when working with a saw that is constantly tending to wobble, and it is also simply physically difficult to hold it in your hands all the time.

All experts agree that if possible, it is better to take the material to a sawmill, where they will be processed using professional equipment. least losses and extremely smooth edges.

Whatever you can do with a chainsaw - with the help of all kinds of attachments, this tool becomes very multifunctional. Don't know how to cut a log into boards with a chainsaw? Now we won’t talk about that!

Chainsaw - a tool for all occasions

Most owners have no idea what capabilities are hidden in this seemingly single-function tool. We are talking about what functions, besides sawing logs into firewood, a chainsaw can perform in in capable hands. But just think - the tool is absolutely autonomous, fill the tank with fuel, and work where it’s convenient for you!

A wide range of work results in a powerful, compact and safe Gas engine, who has a very unpretentious “character” and the ability to work in the most difficult conditions. Another good thing about a chainsaw is its sealed fuel supply system, which, in combination with a diaphragm type carburetor, allows it to work in a variety of positions, perhaps not upside down. In addition, the designers provided reliable protection components from overloads and breakdowns in the form of a centrifugal clutch.

Look at the chainsaw from a different point of view - you are holding in your hands a tool that is amazing in its capabilities! This is universal drive for a wide variety of devices capable of not only sawing wood, but also cutting metal and stone, pumping water, drilling wells, and even serving as a low-power engine!

DIY multi-tool

The most popular attachment, which is even produced by chainsaw manufacturers themselves, is the petrol cutter attachment, which turns the chainsaw into an autonomous version of an angle grinder. The nozzle device is a bearing assembly with a shaft, with a pulley installed at one end, which is driven into rotation by a V-belt. At the other end there is a mandrel for fastening abrasive wheels. By changing circles, such a grinder chainsaw will be able to cut stone, tile, brick and even metal. Of course, the circle is hidden in protective cover, without which work would be such a tool clean water playing roulette - whether you're lucky or not!

Of course, there are a lot of people who will call this method crazy, because you can buy a normal one and not have to worry about changing any attachments! However, in practice, the idea is completely justified - saws with high speeds, equipped with such attachments, work no worse ordinary Bulgarians. Of course, they can’t compete with professional powerful tools, but in the household they justify themselves. This device has two undeniable advantages - autonomy and saving money.

Another professional attachment that can be bought in specialized stores is the so-called debarkers.

Their functions exactly correspond to the purpose of the chainsaw and, in fact, increase its capabilities - in addition to cutting wood with the help of debarkers, it can be processed, namely, cleared of bark, growths and branches, and also cut grooves in logs, which is useful in the construction of wooden log houses, and give the rounded surface a flat shape. Debarkers are divided into disk and drum. The first ones are used for cutting out recesses and mounting grooves, and the drum ones are used for removing bark from logs; they are also called debarkers. The device is a drum or cutter mounted in a bearing unit. The device is driven by V-belt transmission

, for this purpose there is a special pulley on the axis. Taking into account changes in the diameter of the pulley and the engine speed, you can also change the speed of operation of such a tool for optimal processing of wood.

With the help of a chainsaw and the appropriate attachment, you don't have to worry about emergency water supply at home if necessary - you can make a pump from this woodworking tool in a few minutes! Essentially, the attachment is a regular centrifugal pump that is attached to the saw and driven by the same pulley and belt. The principle of operation is the same as for everyone else centrifugal pumps – one hose is lowered into the water, the second serves as a pressure hose. Before starting work, liquid is poured into the engine through the plug, which is necessary for the pump to “grab” the pumped water. When the turbine rotates, it creates a reduced pressure inside, due to which water is pumped out. The device is essentially the simplest, but imagine what use it can be when Vacation home

de-energized, and the water supply issue needs to be resolved urgently!

With the help of special attachments, a chainsaw can be turned into a drill or a winch, and even into a boat motor, capable of reaching speeds of up to 20 km/h with a fuel consumption of 1 l/h. However, these are already rarer cases, while devices for longitudinal sawing of logs, or, as they are called, mini-sawmills, are found quite often.

First of all, it should be noted that no one sets themselves the task of professionally cutting logs with a minimum amount of waste. For professional work You also need the appropriate tool, but the attachment for longitudinal sawing of logs will allow you to solve many small problems on the farm. Let's imagine, for example, that an old pear tree has dried up in your garden, and you just need a few boards to fill a hole in the shed. Instead of using a tree trunk for firewood, you can use an attachment to get the material you need.

Devices for longitudinal sawing of logs are divided into vertical and horizontal. Most simple device This is precisely the first option: the adapter is attached to the tire at its base, and with the help of a guide bar the straightness of the adapter’s movement is ensured. This entire structure is attached to a board, which serves as a stop for cutting and at the same time as a guide. The accuracy of such a device is not high - it can be used to cut rough boards or give a log a simple square shape However, such a device is assigned corresponding tasks.

How to cut a log lengthwise - cut horizontally!

Provides much greater cutting accuracy horizontal design, which is a rigid frame attached to the chainsaw bar in two places - at the base and at its end. The attachment points can be shifted to provide the required cutting width. Of course, such a device is intended for small logs, the diameter of which will not be greater than the length of the tire.

Using the guide element, you can set the required thickness of the boards. The most difficult thing will be to make the first horizontal cut - in order to get an even cut of the wood, you need to attach an additional guide frame to the log, which will serve as a base surface for the stop. At subsequent stages of dissolving the log into boards, the flat surface of the previous cut serves as a surface for support and a guide.

This design is quite easy to work with. Before sawing a log lengthwise, it must be well secured along its entire length - the less it vibrates, the smoother the cut will be.. To avoid jamming of the chainsaw bar, small wedges are constantly inserted into the cut to prevent clamping. It should be noted that no matter how hard we try, there will be quite a lot of waste compared to a conventional sawmill. To begin, give the log a square shape by cutting upper layer from all sides, and only then proceed directly to dissolving the logs into boards.

It will not be difficult for craftsmen to make attachments of this kind with their own hands when working with welding and metal - the corresponding diagrams on the Internet are not uncommon, and from the material you will need several square hollow pipes, nuts and screws.