Unlike the one mentioned above, the ignition unit does not contain remote elements and fits entirely into the original dimensions of the factory unit. The board of the old unit must be removed, chainsaw friendship ignition.
MP-1 engine designed by ZMKB Progress named after. Academician A. G. Ivchenko - single-cylinder, two-stroke, carburetor, air cooling, displacement 94 cm3, power 4 hp. Engine lubrication - oil mixed with gasoline. The engine and the sawing apparatus are made in the form of independent units and are connected to each other using a flange connection, fixed with a clamp (which is attached to the handles of the saw). This arrangement allows you to rotate the saw unit to any angle and, if necessary, quickly replace a failed unit. Due to its functional completeness and ease of mounting, the Druzhba chainsaw engine was used to drive walk-behind tractors (Kumir, Sadovod), water pumps (Skif, TsBN-1, TsBN-2, PMP-4), generators direct current(GZ-106A) for charging batteries in the field, mechanical winches for skidding forests, in the Kama outboard motor, in lawn mowers. This engine was also popular among those who liked to build equipment with their own hands. In the 60s, attempts were made at the Moscow Aviation Institute to boost this engine and install it on ultra-light aircraft. aircraft. Light helicopters X-3, X-4, X-5 were manufactured, each of which was equipped with propeller-motor units of 4 Druzhba engines operating through a common gearbox on the main rotor. None of the devices passed flight tests due to low engine reliability.
Modifications
Over the years of release general design The saw remained the same, but minor changes were made:
in the 50s - 60s, a modification of the “Friendship” was produced with the handles attached to the fan cover; later the handles began to be attached to the clamp connecting the engine and gearbox.
until the end of the 80s, the Druzhba-4A model with a contact magneto and a KMP-100 carburetor was produced - discontinued;
in the late 80s, electronic ignition was used (from the contactless magneto MB-1), the saw received the designation “Friendship-4A-Electron”;
in the 90s, a more advanced KMP-100U carburetor was used, the saw received the designation “Druzhba-4M” (produced by ZiD) and “Druzhba-Altai” (produced by Sibpribormash), and modern type saw chains were used.
Based on the Druzhba saw, more than one powerful saw"Ural".
Based on the Druzhba chain saw engine, the SD-60 engine was developed to drive stationary installations (generators, pumps), which differed from the prototype in a cast-iron cylinder liner, a float carburetor, a non-removable cable starter and the presence of a speed controller.
Adviсe
Chainsaw repair friendship.
The Druzhba chainsaw has several standard breakdowns that you can fix even yourself, without turning to a specialist for help. Such breakdowns include contact ignition and carburetor adjustment. In most cases, repairing a friendship chainsaw can be done independently.
Druzhba's contact ignition is very sensitive to various oils and brands of gasoline. This causes a lot of problems and troubles for many owners of this equipment. The contact ignition elements of a chainsaw cannot be repaired. If your chainsaw has an old contact ignition, then it is better to replace it with electric ignition. It does not require adjustment, and therefore reduces the cost of maintaining “Friendship”.
When the spark plugs in a chainsaw get wet, you should pay attention to the carburetor - this means that it is overflowing. This problem can be eliminated by slightly bending the gasoline valve inward. In this case, the amount of fuel entering the combustion chamber will be significantly limited, and there will be no overflow to the spark plugs.
You need to learn how to adjust the carburetor of the Druzhba chainsaw yourself, without turning to a specialist every time. To do this, we carry out a sequence of actions: tighten the fuel screw until it stops, unscrew it exactly three turns; air propeller screw until it stops and unscrew two turns. Most likely, you will need to seal the connection between the carburetor and the cylinder to prevent air “leakage”, because its appearance can cause the saw to not work. The adapter coupling can be wrapped with a strip of thin sheet metal or sealed with sealant.
In general, all connections must be sealed - this is the key to a long and quality work
All connections must be tight, because this is the key to high-quality work of “Druzhba”.
With your own hands
Chainsaw sawmill.
Homemade sawmills consist of the following structural parts: frames, lifting brackets, carriage with manual winch, saw unit with electric drive. Another homemade circular sawmill has several auxiliary components: stops, suspension of the power cable, etc.
Frame - the basis of the structure homemade sawmill. All nodes, both main and auxiliary, are located on it. The frame itself is homemade band sawmill welded from several elements. Firstly, there are four legs made of channel No. 8 (80x40x4.5 mm): two front ones with a height of 495 mm and two rear ones with a height of 800 mm. To increase the support area, “soles” measuring 150x150 mm made of steel sheet 5 mm thick are welded to them from below to increase the support area. The legs of a homemade sawmill are connected in pairs (front and back) with crossbars made of channel No. 10, 700 mm long. Guide pockets (made of 5 mm steel sheet) for support-lifting brackets are welded to the walls of the latter from the outside (the racks of the latter should move freely in the pockets, but without large gaps), and from the inside in the upper corner between the wall and the top shelf there are three lugs for handles
The rear legs are connected to each other by a longitudinal connection made of a rectangular pipe 40x25x4.
Vertical movement of the brackets (lifting a log to saw off another board) is carried out using ropes wound around the gate handles. In a given position (with a minimum interval of 5 mm), the brackets are fixed through the holes in them with a pin with a spring cotter pin.
And the last, but perhaps the most important detail of the homemade frame is the longitudinal guide for the carriage of the saw mechanism. The carriage of a homemade sawmill is mounted level, strictly horizontally. The guide is made of channel number 16. Its length is 5400 mm, and it is slightly larger maximum length sawn logs (in this case 4.6 m). The guide is mounted on the rear (high) frame posts. The cantilever ends of the guide are supported by struts made of a rectangular pipe, which additionally connect them with the rear pillars of the frame. If deflections are observed on the guide, they should be eliminated with additional posts or struts.
The carriage is the most labor-intensive component for making a homemade sawmill. This requires fairly precise turning, milling, and drilling work (therefore, it makes sense to entrust this to specialists). The carriage is used for longitudinal movement (feed) of the sawing unit mounted on it - an electric motor with a chain saw. The main parts of the carriage: body, guide and limit rollers, drive winch.
The carriage body is a welded structure. The casing is made of 5 mm steel sheet, the bracket and bottom are made of 3 mm, and the lining is made of 2 mm sheet. The holes in the housing are drilled according to the holes in the flange of the electric motor mounted on the carriage, and the dimensions of the socket are determined by the drive sprocket of the unit with the saw chain put on it and the necessary clearances.
Restrictive and guide rollers are mounted inside the housing. By design, they are all of the same type, they only differ in the length of the axes-regulators and the outer dimensions of the supports. The axles are eccentric, made of steel rod with a diameter of 28 mm. Rollers - ball bearings series 180203 (with double-sided seal). The carriage with the saw unit is moved by a winch using ropes, the ends of which are fixed in the winch drum and on opposite sides of the frame.
The drum is also a welded unit. It is machined from a round rod with a diameter of 40 mm. Three washers are put on and welded onto it (two at the ends and one in the middle), which serve as limiting collars when rewinding the cable on the drum from different sides of the guide, due to which the carriage moves. The rotation of the drum is carried out by a handle using a lever.
The saw unit of a homemade sawmill is assembled mainly from factory-made parts and components. Firstly, it is a three-phase flanged electric motor with a power of 2.2 kW and a rotation speed of 3000 rpm.
What do you need to know?
The device of a gas-powered saw
Chainsaws “Ural”, “Druzhba” and “Druzhba-Altai” consist of such main components as an engine, clutch, gearbox, sawing apparatus, frame with handles and starter controls.
The main components of the engine are the cylinder, crankcase, crankshaft with connecting rod, cooling system, piston, ignition and power supply systems.
The clutch includes a drive disk, on the rim of which there are two cut cast iron rings, and a driven disk with a rim in the shape of the letter “L”.
The gearbox is represented by a housing and two bevel gears: driven and driven, which are mounted on ball bearings in the housing. The frame consists of a rack and a steering wheel with handles, which are connected to each other by a vibration damping device, which consists of a hinge and a spring.
The sawing apparatus is represented by a saw chain and a bar. The power system includes components such as a gas tank, tap and carburetor. When the tap is open, fuel is supplied from the gas tank to the carburetor through the gas pipeline by gravity. The engine is started by a removable starter, consisting of a pin, brakes, ratchet, bolts, shaft, drum, housing, cable, spring, handle and bushing.
Working with a chainsaw
All buyers of gas-powered saws want to quickly test their purchase in real conditions. Remember that you should not start the chainsaw without a saw set and preliminary adjustment of the bar, chain and sprocket - the drive wheel. There is a possibility that the clutch may burn out if you constantly press the throttle button.
Immediately before intensive work, it is necessary for the tire, sprocket and chain to get used to each other. And you need to break in the engine itself, while emptying the entire fuel tank and applying little effort. Do not break in the saw at idle speed, as this may cause increased engine wear.
Move the ignition switch to the working position before starting the chainsaw, pump gasoline into the carburetor, pull out the choke and pull the retractable starter with a strong jerk. If you spin the engine sluggishly with a retractable starter, then the likelihood of filling the spark plug increases, and attempts to start the engine will be reduced to zero. In this case, the spark plug must be unscrewed and warmed up so that all the vapor of the fuel mixture evaporates under heat.
The main points of operation in the operating instructions for the Ural, Friendship, Goodluck and others chainsaws are as follows:
The chainsaw must be held with both hands; wrap all your fingers around the handle of the chainsaw. Place the thumb on your left hand under the front handle.
When working with a chainsaw, you must stand to the side of this tool; you cannot stand directly behind it.
For sawing, it is customary to use the lower and upper edge of the chainsaw. If you prefer to cut with the top edge, then the chainsaw goes towards you, otherwise - away from you.
If possible, you should keep your back straight when working with a chainsaw. It is preferable to bend your legs at the knees. To maintain balance, it is advisable to spread your legs wider.
It is very dangerous to move around with a running chainsaw. When moving between sawing places, it is necessary to turn off the chainsaw for safety reasons and put on the brake.
It is better to start cutting with the edge of the bar, which is located closer to the body of the gas-powered saw.
If you plan to use your chainsaw frequently, then it is advisable to re-read the operating instructions for the Husqvarna, Friendship, Ural, etc. chainsaw. and purchase special protective clothing: a protective jacket with ventilation, a helmet with a mask, special pants with protection against saw cuts, boots with protective steel plates and durable gloves.
Seasonal use
Two-stroke internal combustion engines require Special attention during the changing seasons of operation. When using a gas-powered saw with a temperature outside the window below 0 degrees, you need to warm up the carburetor itself, since the fuel mixture can crystallize, thereby increasing the viscosity of the mixture. In this case, the saw itself must adapt to this temperature regime.
If the chainsaw is kept in an unheated building in which there is less than zero degrees Celsius, it is undesirable to bring it directly into a room where the air temperature rises above 0°C, since otherwise condensation may form, which will lead to malfunctions in the functioning of the equipment and other negative consequences.
Fuel mixture
All chainsaws have 2-stroke internal combustion engines. There are two tanks: for the fuel mixture and oil. The volume of the tank in the usual case is about 0.3-1 liter, and the container for oil is usually 2 times smaller. These proportions lead to the fact that after the fuel mixture in the tank runs out, the oil is consumed almost equally.
A chainsaw with a two-stroke engine, according to the operating instructions for chainsaws Friendship, Ural, Goodluck, Shtil, Hustkvarna, is usually fueled with a mixture, not gasoline, which contains oil and gasoline in certain proportions. The process of preparing the fuel mixture for such engines is very important, so you should not neglect the manufacturers’ requirements for its production. In a two-stroke engine, friction parts are lubricated, unlike a four-stroke engine, thanks to the fuel mixture, in which a certain part of the oil is present.
In two-stroke engines, an oil pump system cannot be used; oil is usually added to gasoline. Before directly pouring the fuel mixture, it is recommended to shake it thoroughly. For chainsaws, as a rule, a fuel mixture is prepared from oil and gasoline. You will need 40 milliliters of oil and 1000 milliliters of gasoline. Mix the mixture thoroughly before pouring it into the fuel tank.
When making a mixture for a chainsaw, it is recommended to use only branded oils. The suggested brands of oil that should be used to prepare the mixture are indicated in the instructions. It is prohibited to use two-stroke oils for low-speed engines.
It is best to use unleaded gasoline. The octane number of gasoline must be at least 90. The finished fuel mixture must be stored for no more than 1.5 months. Using an old mixture will definitely cause engine failure.
To lubricate the chain, you can use any pure oils or branded special ones. For a domestic chainsaw, 76 gasoline is suitable; for an imported one, it is better to take 92 gasoline and higher. Do not use used oil or low-viscosity oils such as spindle, industrial and transformer oils to lubricate the chain. Before starting the chainsaw, you need to remove it from the place where the refueling took place to avoid fire.
Running in a chainsaw
Before using any imported chainsaw, it is required to run it in first. On the one hand, it is needed to extend the service life of the engine, because the moving parts must first get used to each other during the break-in period. In addition, during break-in you will be able to acquire certain skills in working with a gas-powered saw. This is important for those users who are reading the operating instructions for the Makita, Friendship, Ural, Shtil chainsaw for the first time and working with the chainsaw.
Running in the chainsaw must be done with a minimum load on the engine in a cyclic mode of operation: sawing lasts 1-1.5 minutes, then idle for 15-20 seconds. The engine will gain maximum power after ten full tank refills. You cannot run the engine at idle speed, because the formation large quantity carbon deposits provoke sticking of the piston rings or failure of the spark plug.
Characteristics
Chainsaw "Friendship" is one of oldest models, which has more than half a century of history. It was developed in 1953, and in 1955 its mass production began at two enterprises in Perm and Biysk. The chainsaw received a gold medal at the Brussels Technical Exhibition in 1958.
Since the beginning of the 90s, private enterprises began to produce saws and spare parts for them. The saw received its name in the year of celebration of the reunification of Russia and Ukraine in 1954. Despite its long history, specifications Friendship chainsaws remain acceptable to many consumers.
The chainsaw is equipped with a single-cylinder, carburetor, two-stroke MP-1 engine, air-cooled and with a displacement of 94 cubic meters. see. The digital value in the name of the chainsaw means the power in horsepower: “Friendship 4” means the power of the chainsaw engine - 4 liters. pp., “Druzhba 4E” has an engine with electronic ignition. The engine is lubricated with oil mixed with gasoline. Independent mounting on the flange connection of the power unit and engine made it possible to position the saw unit in both horizontal and vertical positions. Replacing any unit due to separate fastening is not difficult.
It is from the Druzhba chainsaw that the technology of automatic saw chain lubrication originates, which can significantly increase the service life of the chain and guide bar, which are universal. This allows the use of saw chains with different pitches, in case of changing guide sprockets and damper device tactics. The saw has an inertial clutch, which sets the chain in motion by increasing engine speed. When the chain bites or the saw is overloaded, the engine does not stall. The characteristics of the Friendship chainsaw satisfy the needs of consumers so much that millions of people have given it their preference for many decades.
Saw weight, without Supplies is 12 kg. A chainsaw, when operating at low speeds, allows the use of any oil. The engine is capable of “consuming” fuel with a low octane number. The saw is also equipped with an emergency brake to stop it in case of emergency. The instructions for the Druzhba chainsaw contain a complete description, with possible problems that may arise and ways to eliminate them.
In some European countries, the name of the saw “Friendship” has become a household name. This is the name of any chainsaw. And two hand saw popularly began to be called “Friendship - 2”, due to the participation of two people in the process. In addition, the high location of the controls allows the operator to cut in a “standing” position, whereas, like with modern saws, the normal working position of the operator is the “kneeling” position. The average saw service life is 15 – 30 years. The main purpose of a chainsaw is: felling trees, cutting trees, sawing and harvesting firewood.
Preparing for work.
First, check the chainsaw for chain tension, which should be adjusted; sagging of the chain is unacceptable. Poor chain tension can wear out the tire and sprocket faster than expected, greatly increase the load on the chain saw body and prematurely damage the shock absorbers.
The chainsaw chain should not touch hard objects; turn on the chain brake, move the brake handle away from you so that the chain does not rotate prematurely. Pull the throttle control lever, this can be done when the engine is cold. Place your toe through the rear handle. Pull out the starter cord by pulling the handle until the chain saw sneezes.
After this, start the chainsaw and move the air damper to the working position. Press the gas and put the chainsaw into idle speed. Pull the brake handle towards you to return it to its previous position. Now the chainsaw is ready for work!
Before starting work, check the tool brake. Next, place the saw on a flat, hard surface and press the throttle. Do not release the chainsaw handle, press the handle and apply the brake. The brake will be considered ok when the chainsaw chain stops.
Before starting the chainsaw, be sure to check that there is chain oil in the tank. If there is no lubrication at high speeds, problems with the chain and bar may occur. You can check the presence of lubricant during operation. When the chainsaw is running at high speeds, it is necessary to point the bar at clean paper. If the lubricant flows normally, a strip of oil will be visible on the sheet.
How to fell trees
Just before felling a tree, you need to read other saws and determine where it will fall. Look at the number of branches and where the main ones are facing, it is worth taking into account the direction of the wind and the natural slope of the trunk. It is necessary to fell the trunk in the direction where it is most convenient for it to fall. Cut off the lower branches of the tree just before felling.
Depending on the thickness of the tree and other features, there are several methods of tree felling, the most optimal solution selected only by professional lumberjacks. Before felling a tree, you should make sure that it will not damage anything after it falls.
Stand from the trunk of the fallen tree to the left, cut off the branches from it, move from the bottom of the trunk. Try not to use the nose part of the chainsaw; work slowly. Lean the chainsaw against a thigh or tree trunk and use all parts of the bar to cut. Place the gas saw on its side, with its entire weight on the trunk, cutting branches from the top of the trunk. When the branches are cut off from the top and sides, you can turn the trunk over and saw off the rest.
However, remember that at a certain position of the tree, which rests on one branch, the trunk may move or roll when it is trimmed. For thick and large branches, it is necessary to saw off in parts, moving from its end. If the branch is too thick, it may need to be sawed on several sides.
When you have sawed off all the branches from the trunk, you can start sawing the trunk - bucking it. Bucking must begin from the trunk to the top. If the trunk is located on an inclined plane, then when bucking it is forbidden to stand below the tree trunk. If a gas-powered saw is stuck in the trunk, it must be removed immediately. Stop the engine and tilt the barrel until you can remove the chainsaw.
Chainsaw care
Gas-powered saws should be kept under cover or in open areas. Before storing the tool, it must be cleaned of sawdust and dirt, drain the fuel from the tank, remove the saw chain and place it in oil. Open places that are subject to corrosion must be lubricated with a layer of oil. Chainsaw for long-term storage needs to be preserved.
After working with a gas-powered saw, you must do the following:
Check the chain saw tension and lubrication. If you run out of oil, you need to add it to the tank and tighten the chain if it is loose. Let the tool rest and cool for a while, then fill the saw with gasoline.
Do not forget to check the air filter, which may become clogged with shavings and sawdust during operation. Therefore, it needs to be removed, blown and washed in time. If necessary, you should clean the filter from dirt.
After every hour when the chainsaw was working, you need to lubricate the driven tire sprocket and immerse it in heated oil.
After 25 hours of operation, it is necessary to remove dust from the cylinder windows, combustion chamber, piston grooves, rings and piston crown.
Engine starting
It is necessary to carefully read the operating instructions for the stihl chainsaw, friendship, calm, ural, especially the sections that relate to starting a cold and hot engine. The principle of starting the engine is the same in all saws. The only differences are in the placement of the gas saw controls - the choke lever and the STOP button.
With separate controls
You need to start a cold engine in this way:
turn the switch to the “on” position;
pull out the choke lever all the way;
move the choke lever to the middle position (the choke is open, the high idle position remains on);
repeat the startup procedure;
After starting the engine, immediately press and release the throttle trigger - the choke lever will automatically move to the working position.
You need to start a warm engine like this:
turn the switch to the “on” position;
pull out the choke lever all the way, then move it to the middle position, or do not touch it and leave it in the traditional idle position;
carry out the procedure for starting the engine;
when the choke lever is in the increased idle position after starting the engine, press the throttle trigger and release it;
The engine can be stopped by moving the switch to position 0 (off).
With combined controls
You can start a cold engine in the following sequence:
simultaneously press the throttle trigger lever and move the damper control shaft to the lowest position, the air damper in this case is completely closed;
pull the handle of the starter cord several times until the first flash of fuel in the engine;
move the control shaft to the middle position;
repeat the procedure for starting the engine;
After starting the engine, press and release the throttle trigger, the control shaft in this case automatically moves to operating position I.
Starting a warm engine according to the operating instructions for the Stihl chainsaw and any other gas-powered tool is carried out as follows:
move the control shaft to the normal idle position;
start the engine;
press and release the throttle trigger when the shaft is in the high idle position.
Safe work rules
It is strictly forbidden to work with an unregulated and faulty gas-powered saw.
When starting the engine, do not wrap the cable around your hand.
When starting the engine, the chain should not touch any objects.
To avoid damage to the chainsaw and accidents when felling a falling tree, do not cut right through the tree. You should leave 3-4 centimeters of unfinished water.
Turn off the chain when moving from one tree to another.
Work on installing the chainsaw chain and adjusting its tension level should be carried out with the engine not running, wearing a protective helmet and gloves.
After filling the gas-powered saw with oil and fuel, carefully remove any remaining oil and fuel from its surface and wipe it dry.
It is forbidden to cut down a tree over which another one hangs, as well as to cut down heavily overhanging or leaning trees due to the danger of such an operation for the lives of sawyers.
When felling a tree, only the sawyer and his assistant can remain at the chainsaw; other people must be at least 50 meters away from the working tool. The assistant warns the sawyer by voice or signal that the tree is about to fall.
Before finishing sawing, the sawyer and assistant must carefully monitor the direction in which the tree is falling, moving quickly to the side with the saw, but not against the butt of the tree.
Passing through a moving chain is prohibited. If the chain runs out or breaks, you must immediately release the gas and turn off the engine. The saw chain may only be attached to the bar when the engine is not running.
When refueling a gas chain saw, according to the operating instructions for the Huskvarna, Goodluck, Ural, Shtil and other chainsaws, smoking is prohibited.
Filling a chainsaw with fuel mixture at a distance of less than 20 meters from an open fire is strictly prohibited.
The carburetor should be adjusted so as to ensure the least contamination of the exhaust gas inhalation area, and stable idle speed of the engine, at which the saw chain does not move along the bar.
When moving over a long distance, the chain saw engine should be turned off and tightly covered with a special cover.
Tree felling using a gas-powered saw must be done exclusively in a prepared cutting area, where dangerous hanging and dead trees have been removed.
Prices / Order
Firms
Choosing a chainsaw is both simple and complex at the same time. That is why the answer to the question of which chainsaw to choose cannot have a clear answer. In order to choose a reliable chainsaw, you need to take into account factors such as the types of work for which it is intended, the time during which you intend to work, and even the build of the person (or people) who will work with this tool. Despite the variety of models and manufacturers producing chainsaws, we will try to tell you which chainsaw is best to buy in each specific case.
Choosing a chainsaw depending on the class.
Before you find out which chainsaw is better, clearly decide what you are going to use this tool for, since the cost of a chainsaw is primarily determined by its power and ability to work for more or less long periods of time - that is, the class of the chainsaw.
Household chainsaws are the best choice chainsaws for the garden. This type of chainsaw is used occasionally and for short periods of time. With such a saw you will find a minimum functionality, however, with the help of such a saw you can cut enough firewood to cook kebabs or light a fire in the fireplace.
It is assumed that a household chainsaw is used by its owner for no longer than 40 minutes a day. The service life of such a chainsaw ranges from 400 to 1000 operating hours. But city dwellers who are not accustomed to heavy loads will like their relatively compact size and light weight. These qualities compensate for the low power household chainsaw. By choosing a household saw you will receive a reliable assistant for various simple work around the house and garden.
The best models in this class are chainsaws: Stihl MS 180; Husqvarna 235 X-TORQ ; Echo CS 350WES
Semi-professional chainsaws - if you expect to perform more complex work or use a chainsaw for construction or home expansion, then when deciding which brand of chainsaw to choose, opt for semi-professional chainsaw models.
These tools shouldn't be used all day long without stopping, but they can do more than their household counterparts. They can handle logging in volumes of one household. Sometimes professionals also use such saws - for example, when trimming knots in logging sites.
You can choose a semi-professional chainsaw on our website among the models: Stihl MS 250; Stihl MS 270 ; Echo CS-4200ES; Echo CS-5100ES
Professional chainsaws are a tool for lumberjacks. They are powerful, reliable and can work for years, 8 hours a day without interruption. In order to provide a long working life - 1300 - 2000 hours - the best chainsaws are made from durable and wear-resistant materials, which provides them with a longer “mileage” without major repairs.
Choosing a chainsaw depending on service availability
No matter how reliable your chainsaw is, you need to remember that sooner or later any tool requires Maintenance or repair. Therefore, when answering the question of which chainsaw to choose, you must take into account whether there is a branded service center in the place where you live.
The easiest way to choose a chainsaw is to determine whether the package contains instructions in Russian. This guarantees that the delivery of the tool was “white” and all manufacturer’s warranties apply to the purchased chainsaw, and it is also possible to use the services of a service center.
In addition to repair and maintenance, the chainsaw needs to “straighten” the chain from time to time. The performance of the chainsaw depends on the condition of the chain. A professional instrument is often adjusted daily.
Choosing a chainsaw depending on power and weight.
These two technical characteristics of a chainsaw are closely interrelated. That is, increasing power entails a simultaneous increase in mass. You need to understand that for a household chainsaw, high power is not the most important selection criterion. For a non-professional, reliability and light weight are more important. You simply cannot cope with a powerful pilof.
For professional chainsaws, the power spread is quite large, since the choice of chainsaw in this case depends on the type of work and even on the time of year. For example, there are chainsaws, the design of which allows you to work with one hand.
Additional options when choosing a chainsaw.
Pleasant little things like an anti-vibration system are necessary for those who hold a chainsaw in their hands for a long time. For long service life of chainsaws, it is important that the chainsaw has an air filter that protects it from dust contamination.
It is especially important that the chainsaw is equipped with a reliable brake - after all, it is one of the most dangerous tools.
The length of the saw bar must be consistent with the power of the saw; it is not worth installing bars longer than the length indicated in the length passport.
We hope that our tips for choosing a chainsaw will help you make the right choice.
What keys do we use?: chainsaw friendship price chainsaw friendship 2 chainsaw friendship chain chainsaw friendship characteristics
Saw Friendship-2
Friendship-2 is gasoline saw, mechanizing labor. In our example, we mean an ordinary hand saw, designed for the friendship of two people.
Burning verb: Dictionary of folk phraseology. - Green Age. V. Kuzmich. 2000.
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The first model of the Druzhba chainsaw was developed in 1953 and released in 1955. They were produced at machine-building plants in the cities of Biysk and Perm. All models of these chainsaws have a two-stroke, single-cylinder, air-cooled engine with a carburetor. Thanks to its convenient design and high performance, Druzhba is still in demand, and saws of the first models are also in working condition. The main purpose of the Druzhba chainsaw is felling forests and sawing logs.
Before operating any chainsaw, be sure to read the manufacturer’s instructions and follow all safety rules.
Chainsaw models
The overall design of the saw has not changed significantly over time, only individual parts have been modified. The number at the end of the model name indicates its power, for example, Druzhba 2 - 2 hp. In the first chainsaw produced, the handles were attached to the fan cover; later they began to be attached to the clamp that connected the gearbox and the engine. Model 4A, produced until the 80s, already used a contact magneto and a KMP-100 carburetor. Automatic chain lubrication was also used for the first time. Later it was discontinued and instead they began to produce the 4A-Electron model with electronic ignition.
In the 90s, the previous carburetor was replaced with a new KMP-100U. The chain saw became known as Druzhba-4M and was equipped with updated chains. Based on the Druzhba chainsaw, the Ural saw with more powerful characteristics was developed. The latest model produced with a similar design is Druzhba 5E.
Additional marking with the letter E or the word “Electron” means that the chainsaw uses an electronic ignition system.
Characteristics
Friendship-2
This model became one of the most popular of the entire original series. The Druzhba-2 chainsaw is powered by a two-stroke single-cylinder engine with a power of about 2.2 kW and a rotation speed of 3200 rpm. Compared to the previous version, this one was performed with better quality. The frame and handle are made in such a way that the user cannot get burned on the hot engine. The case is made of high-quality alloy, which is not afraid of temperature changes. Unlike the first model, this one already has a mechanical chain brake for safe use. In the event of a rebound or breakage, it will stop the chain. The saw was intended both for household needs, and for professional felling of forests. Weight 12.5 kg.
Friendship-4
The Friendship 4 chainsaw uses the same engine as the previous model, but with more power – 4 hp. or 2.94 kW. The engine and power unit are installed using a flange connection secured with a clamp. If necessary (repair, replacement), the engine can be easily removed in any conditions. Based on the Druzhba 4 saw, two modifications were produced, marked 4A and 4E. The first one added an automatic saw chain lubrication system, and the second one used electronic ignition. The shortcomings of previous models were also taken into account, for example, the crankshaft bearing was strengthened. All versions were produced with an emergency braking system.
The Friendship 4M-Electron chainsaw uses a similar engine with a power of 2.94 kW and a rotation speed of 5200 rpm. The cylinder is made of aluminum alloy, and the inside is treated with chrome to increase wear resistance. Unlike earlier versions, this chainsaw is equipped with a rotary gearbox, which allows you to rotate the saw unit by 60-90° for more convenient operation. The weight is distributed evenly throughout the body to make work as comfortable as possible. There is also a vibration damping device located between the steering wheel with handles, struts and the gas tank.
To reduce the noise level, the saw is equipped with a muffler, and the emitted noise level is 106 dB. The Druzhba 4M-Electron chainsaw is equipped with a KMP-100U or KMP-100-AR carburetor. There are automatic braking and saw chain lubrication systems. Weight 12.5 kg.
Friendship-5E
The latest version of this series of chainsaws released. Equipped with a two-stroke single-cylinder engine with a power of 5 hp. or 3.7 kW. Due to this, its performance is noticeably higher than that of previous models. Rotation speed 6200 rpm. At the same time, the noise level emitted is slightly lower than that of Druzhba-4M Electron, and is 105 dB. The weight of the 5E chainsaw is 800 grams less - 11.7 kg.
Table with technical characteristics of Druzhba chainsaws:
| Friendship-2 | Druzhba-4M Electron | Friendship-5E | |
| engine's type | Single cylinder, two stroke, petrol | ||
| power, kWt | 2,2 | 2,94 | 3,7 |
| Rotation speed, rpm | 3200 | 5200 | 6200 |
| Tire length, cm | 45 | ||
| Startup type | Manual | ||
| Automatic chain lubrication | - | + | + |
| Fuel tank volume, l | 1,5 | ||
| Volume of the lubrication system tank, ml | 240 | ||
| Electronic ignition | - | + | + |
| Weight without consumables, kg | 12,5 | 12,5 | 11,7 |
| Dimensions, cm (WxHxD) | 46x50x86.5 | 46x46x88 | |
| Rotary gearbox | - | + | + |
| Chain pitch, inch | 0,404 | ||
| Engine lubrication | Gasoline mixed with oil | ||
Advantages and disadvantages
Positive qualities of Druzhba brand chainsaws:
- high productivity and the ability to work for a long time without interruptions for 50 minutes,
- simple design,
- the presence of high handles, thanks to which you can saw in a standing position, they also ensure safer use and reduce vibration levels,
- accessible location of all parts,
- the chain is driven by high engine speeds, at idle it is motionless,
- low octane fuel can be used,
- the presence of an emergency brake in most models,
- when the saw chain gets stuck, the saw does not stall,
- precise and even cut,
- The service life, subject to operating rules and proper care, can range from 15 to 30 years.
The main disadvantage is the heavy weight. Also, because the starter is removable, it often gets lost, and there is no Stop button.
Do not use leaded gasoline as fuel or run the saw in a confined space.
Thanks to its simple design, you can repair the Druzhba chainsaw yourself. For example, saws of this brand often have problems with ignition, especially if a contact one is installed. It is extremely sensitive to various oils and gasoline. Therefore, it is better to purchase electronic ignition instead. Moreover, contact spare parts for the friendship chainsaw are expensive and irreplaceable.
If the spark plugs are heavily flooded, you should pay attention to the carburetor. In this case, it is necessary to bend the gasoline valve slightly inward; as a result, the amount of fuel supplied will decrease and the spark plugs will stop getting wet.
The carburetor is also easy to adjust:
- The fuel screw is screwed in completely and unscrewed back 3 turns.
- Close the propeller completely and turn it back 2 turns.
To prevent air from being sucked into the system from the outside, all seals must be tight.
Compared to other models, the Druzhba chainsaw is sold at a lower price due to the small number of functions, but has excellent quality and a long service life, which imported models cannot boast of.
The main malfunctions of the Druzhba chainsaw - video
The Druzhba line of chainsaws has been put into production since 1955. The first models were produced at machine-building enterprises in the cities of Biysk and Perm. On Russian market The Friendship chainsaw has been popular for a long time. However, recently, due to insufficient quantity functionality and heavy weight makes the series of sawing machines from imported manufacturers uncompetitive.
Short description
Let's start with the etymology of the name, which often causes confusion - why a chainsaw could be called friendship. The same name was given to a two-handed saw, which could only be operated by two people with full coordination of actions. That is why the electric analogue was given the name Druzhba chainsaw. The technical characteristics specified in the operating instructions indicate that the equipment, regardless of the series and modification, has powerful engine, air-cooled and carburetor.
The non-standard design has very convenient shapes that have a positive effect on the comfort of work. If most of the work of modern saws when felling forests is designed for the operator to be on his knees, then the location of the handles on the “Druzhba” is made higher so that the operator can work standing and feel comfortable at the same time.
The main purposes of the units are:
- felling of forest;
- treatment wood material;
- sawing logs.
Since the release of the equipment it appearance did not undergo fundamental changes; only individual spare parts were improved, responsible for the stability and quality of operation of the unit. Almost all models produced back in the 60s of the last century still work properly.
Each model has its own digital designations, for example, “Druzhba-2” stands for how many horsepower the garden equipment is designed for, in this case - 2 hp.
Despite the fact that the technical characteristics of the device have long been considered outdated, it displays good performance thanks to:
- single-cylinder engine, two-stroke and carburetor type with built-in air cooling function and volume - 94 cm3;
- average power - 3 hp;
- a gearbox consisting of 2 bevel gears and a housing;
- independent units connected by folded seams and secured with clamps.
VIDEO: Ural or Friendship - interesting answers to uncomfortable questions
Rating of the best chainsaw models Druzhba
On this moment The line of equipment is divided into many modifications; let’s look at the most popular models.
Friendship 2
The model is equipped with a two-stroke gasoline engine, which has a relatively high power, reaching 2.2 kW. Thanks to these data, the unit is able to accelerate the saw element to 8,700 revolutions in 60 seconds, which allows you to perform complex work in a short period of time.
Chainsaw Friendship 2 is a new modification that has high quality assembled from durable spare parts. In addition, the equipment has an updated design, which has been developed for several years based on developments noted by the manufacturer in modern devices. Garden equipment is equipped with a competent balancing system, which has not previously been used for models of this brand.
The design is designed in such a way that the user cannot get burned during operation, since the unit has the option of self-cooling.
The device body is made from durable material, capable of not changing its qualities at any weather conditions. All main spare parts are securely hidden inside the unit, which protects them from mechanical damage and corrosion.
In addition, the Druzhba 2 chainsaw is equipped with a relatively new option - a mechanical chain brake that can protect the operator from unexpected chain kickback.
The unit is designed for gardening, construction tasks or landscaping summer cottage. The device perfectly performs the work of sawing firewood, felling trees with a small diameter and sawing building wood material.
Brief characteristics of the model:
Friendship 4
The unit is designed for fast and high-quality cutting of wood. Compared to the previous model, it has an improved design and more power.
Comfortable rubberized handles, electronic ignition, automatic chain lubrication and an anti-vibration system ensure comfortable work with the saw device.
The manufacturer took into account the shortcomings from the previous modification (D2), as a result of which the crankshaft bearing was strengthened.
Chainsaw Druzhba-Altai
The Druzhba-Altai chainsaw was released in the nineties, it is considered a new brand garden units. The design and main technical characteristics fully correspond to the Druzhba-4m model. However, this series includes a more powerful, durable carburetor and an improved saw system.
Buying a Druzhba brand chainsaw today is quite difficult, since most stores specializing in the sale of garden equipment give preference to imported models with best qualities and lower cost.
Based on design characteristics and using a similar body, the Ural saw system was produced, which had a more powerful engine, a detachable crankcase, a replaceable cylinder, a starter, and an identical handle arrangement.
Carburetor adjustment is carried out strictly following the instructions or recommendations of specialists, otherwise the basic functioning of the unit may be disrupted.
The legendary Druzhba chainsaw was developed back in the mid-50s. Perm Machine-Building Plant. Its various modifications are still in demand among both amateurs and professionals. There are a number of reasons for this. First of all, it is necessary to note the high performance of the tool.
Consumers also note the unpretentiousness of the saw, the simplicity and versatility of its design. The latter circumstance contributes to the presence of a huge number of modernizations, improvements and homemade products made on the basis of the tool. Under the Druzhba brand different time Several models of chainsaws were produced.
Review of chainsaw models Druzhba
Let's take a closer look at the line of the Perm Machine-Building Plant:
- Chainsaw Friendship 2.
- Chainsaw Friendship 4.
- Chainsaw Friendship 4 Electronic.
- Chainsaw Druzhba-5E.
Let's take a closer look at these models.
Chainsaw Druzhba technical characteristics
| Parameters and characteristics | "Friendship-2" | "Druzhba-4M Electron" | "Friendship-5E" |
| Device power | 2.2 kW | 2.94 kW | 3.7 kW |
| Speed indicators | 3200 rpm | 5200 rpm | 6200 rpm |
| Availability of automatic chain lubrication | Absent | Present | Present |
| Availability of electronic ignition | Absent | Present | Present |
| Lubrication system tank volume | 240 ml | 240 ml | 240 ml |
| Tire length | 45 cm | 45 cm | 45 cm |
| Unit weight | 12.5 kg | 12.5 kg | 11.7 kg |
| dimensions | 46x50x86.5 cm | 46x50x86.5 cm | 46x46x88 cm |
Friendship 2
Immediately after its appearance in 1955, the Druzhba 2 chainsaw gained immense popularity among forestry workers and amateur gardeners. The tool, at that time, had a number of significant advantages, the main of which were high productivity, ease of use and repair. The two-stroke single-cylinder engine produced about 3 hp. (2.2 kW), while the rotation speed reached 3,200 rpm.
Important: Special care must be taken when working with this model; it is missing many modern systems operator protection.
From the point of view of the modern consumer, these figures are not particularly impressive. In addition, the chainsaw had other disadvantages. Manufacturers in those days did not care too much about the safety of consumers of their tools. The saw did not have an instant stop system or an engine stop button; it could be turned off manually by cutting off the access to fuel.
The first models did not have an automatic chain lubrication system; this reduced productivity and led to rapid wear of the cutting edge. The weight of the Druzhba chainsaw was also not admirable - about 13 kilograms in running order.
Friendship 4
This model is also outdated for a long time, but continues to enjoy some popularity. Compared to its predecessor, Friendship 4 had a number of major improvements.
First of all, the creators of the tool provided for the presence of chain lubrication, and the engine power increased to 4 horsepower (2.94 kW), with a working volume of 95 cm3. The engine cylinder and piston are made of high-strength aluminum alloy, which increases their service life. the total shaft rotation speed is 5000-5400 rpm.
Thanks to these innovations, the power of the Druzhba chainsaw increased significantly; the new model was able to process up to 75 square meters. see wood per second.
The new saw received forced air system engine cooling. The spark plug is ignited using a magneto and a special wire. Gasoline flows from the tank by gravity - you just need to open the fuel tap. In accordance with the operating instructions for the Druzhba 4 chainsaw, the engine requires a fuel mixture in an oil/gasoline ratio of 1:15. The manufacturer also took care of the comfort of workers - a new, improved muffler was installed on the saw.
Important: Do not use gasoline with an octane rating of 93 or higher, as this will cause engine damage.
Friendship 4 Electron
The new product was distinguished by the presence of electronic ignition. Its power is 3 kW. Fuel consumption - 720 g/kW h; the distance between the electrodes of the spark plug is within 0.6-0.7 mm.
Friendship-5E
The latest model of the brand is called Druzhba-5E. It was distinguished by greater engine power (up to 5 horsepower) and higher performance. At the same time, the instrument lost 800 grams in weight. Operators noted lower noise levels - the muffler was once again upgraded.
In the mid-90s, the popularity of the instruments of this model range drops sharply due to deteriorating build quality and the use of low-quality materials.
Running in the new Druzhba saw
For refueling, special oil for two-stroke engines and AI-92, AI-95 gasoline are used.
Prepare a fuel mixture at the rate of oil/gasoline 1: 15. Running in the chainsaw should be carried out in accordance with the operating instructions for the Druzhba saw, in two stages. At the first stage of running in Idling At least four tanks of fuel must be used up. After this, you can start working without overloading the tool.
Important: The manufacturer installs a retaining ring between the throttle body and the carburetor cap. Do not remove it until the break-in period is complete.
At the second stage, the saw must work for 25 hours in gentle mode. Only after this can you remove the retaining ring and begin full operation.
Chain tensioning and lubrication
The performance of the saw and its service life largely depend on proper chain tension and lubrication.
- Place the chain on the bar.
- Install the tire onto the gearbox.
- Tighten the mounting bolts, then loosen them.
- In this position, the chain should sag by 7-10mm.
- Tighten the mounting bolts.
The Druzhba 4 chainsaw has an automatic chain lubrication system. Pour oil into the reservoir and check that the oil is spraying evenly while idling.
It is also important to know how to replace the sprocket. This process consists of the following stages:
- Dismantling the chainsaw headset, unscrewing the nuts of the tire cover. Removing the bar and chain.
- Removing the air filter.
- Unscrew the spark plug using a universal wrench and replace it with a piston stopper.
- Using a clutch puller, which is mounted in a universal wrench, the clutch is removed.
- Replacing the sprocket.
- Reassemble in reverse order.
Carburetor adjustment
Often the Friendship chainsaw starts and stalls, does not start at all, or consumes too much gasoline. One of the reasons for increased fuel consumption and uneven work engine is an incorrectly adjusted carburetor. Its adjustment does not require special skills and can be done at home.
Before you start disassembling the carburetor, make sure that the spark plugs are not filled with fuel mixture - this happens quite often in units of this type. Then you should pay attention to the gas valve and bend it a little inward. This operation reduces the amount of fuel supplied.
If the engine still runs unevenly, proceed to adjusting the carburetor:
- Tighten the fuel screw until it stops.
- Unscrew it back three full turns.
- Turn the propeller all the way in.
- Loosen the propeller two turns.
- Check the seals for leaks.
Maintenance
Daily maintenance is carried out before and after work: the functionality of the Druzhba chainsaw is checked and it is cleaned of contaminants. Routine inspections are carried out in case of malfunctions, minor malfunctions, to adjust the chainsaw carburetor, sharpen the chain, etc.
After completion of active work, it is necessary to mothball the unit. Clean it from dirt, dry it, lubricate the working parts to prevent corrosion from forming, cover it and put it in a dry place.
Reactivation of the Druzhba chainsaw
- Thoroughly clean the outer surfaces of the housing from factory grease. Pay special attention to the starter.
- Unscrew the spark plug, wash it in gasoline, wipe it with a clean cloth, dry it and put it back in place.
- Wipe the ignition wire with a clean cloth.
Advantages and disadvantages of Druzhba saws
Advantages:
- Simple design.
- Durable metal housing.
- Convenient location of all main components.
- Successful frame design ensures user safety and compensates for vibration of the saw.
- The chain moves only at high speeds.
- Unpretentious engine.
- Long service life at correct operation: 15-30 years.
- Mechanical brake to stop the chain in the event of a break or impact.
- Possibility of using low-octane gasoline.
Disadvantages of the unit:
- Removable starter: often lost, resulting in lost working time.
- There is no stop button; the saw has to be turned off at every break (Druzhba 2 model).
- It's heavy and not everyone can handle the tool.
- Lack of original spare parts, model has long been discontinued.
- Lack of automatic chain lubrication system.
- Absence of a rotary gearbox (in the Druzhba 2 model).
- Insufficient sealing of the fuel tank, as a result of which moisture could enter the container.
Most common faults
- Engine won't start
Check for spark at the spark plug electrodes. Make sure there is no damage to the wire insulation, clean or replace the spark plug if necessary. - Uneven engine operation, the Friendship chainsaw starts and stalls.
Make sure the fuel tank is tight; interruptions in engine operation are often caused by moisture and condensate getting into the fuel mixture. - Rapid engine overheating
Adjust the carburetor - Gearbox overheating
The most common cause of overheating is a lack of lubrication. Correct the problem. - The saw sparks in the exhaust, the noise during operation has increased
Check the serviceability of the muffler. Its design is quite simple; repairs are possible at home. - No spark
The reason may be a malfunction of the ignition module, as well as a violation of the gap between it and the magnetic circuit in the flywheel. Gap length – from 0.2 mm. up to 0.5 mm.. This value is set using a special gasket, which is located between the flywheel boss and the ignition module.The broken module is replaced. In addition, you can replace the spark plug.
Homemade chainsaws Friendship
We have already mentioned that thanks to the universal and reliable design, chainsaws of this brand are often used in the manufacture of various homemade devices. Sometimes you have to be surprised when you look at what can be made from old chainsaw Friendship. Let's look at the most common ones:
Moped from chainsaw friendship. Find an old bicycle, make a mount on the frame and install the engine there. If you are using a mountain bike, then you will need a gear and gearbox.
Powerboat. You will need a motor and gearbox with a 2:1 gear ratio. Don’t forget to complement the design with blades with a diameter of 21 centimeters or more. Let's note the efficiency of your outboard motor from a chainsaw. At a speed of 20 km/h, you will spend no more than a liter of fuel in one hour.
Snowmobile. The most widely used snowmobile is the Druzhba chainsaw. Various modifications of this small vehicle faithfully serve their owners.
Important: When manufacturing and upgrading various tools and Vehicle Special attention should be paid to safety. We do not recommend making grinders - this product is the most dangerous to use. Failure to comply with safety regulations can lead to serious consequences.
In addition to the listed homemade products, you can often find motor cultivators, hillers, and lawn mowers designed on the basis of the Druzhba chainsaw. This solution significantly reduces the price of the product.
Pay attention to the walk-behind tractor with the Druzhba chainsaw engine - it will make life easier for everyone involved in cultivating the land, and it will also transport cargo over short distances. All drawings for manufacturing boat motors, mopeds, snowmobiles can be found on the Internet.
Video review of the Friendship saw
Below are several examples of maintenance and operation of various modifications of chainsaws.