What are the requirements for using a chainsaw?

A chain saw that is safe. How to choose and rules of use

requirements, using, chainsaw

When you buy a chain saw, make sure it meets strict safety standards. You should also consider features that reduce the risk of injury. For example, the chain brake, which is located in front of the right hand, is designed to stop the chain if it is automatically activated, to protect against kickback.


Kickback. this is the area where the guide goes up and back to the user at high speed and is the most common cause of serious injury. In other words, it is the top part of the bar (the end of the saw part) that sharply returns the saw when it comes into contact with an object. This can happen if the log you are cutting jams the tip of the guide bar, or if the tip of the guide bar and chain accidentally make contact with another branch, log, or hard object.

Kickback can happen to even the most experienced chainsaw operators, so it is important to wear the proper safety kit. Remember, kickback speed is much faster than a person’s reaction speed, so position the saw so that it cannot hit you in the event of a kickback. It is also strictly forbidden to lift the chainsaw above shoulder height.

Protective Clothing

In the EU, all items of clothing containing protective fabric for saw work have a special logo “for a chainsaw” And give you the class of protection that your clothing can provide. The class tells you what the maximum speed of the “cogs” the fabric can stop.

Safety helmet

Protective helmets are designed to protect the user’s head from the force of the bar or chain when recoil occurs, provided the chain brake is activated and the chain is not rotating. They won’t be able to stop the path from the guide bar or chain from cutting if it’s in motion.

Most safety helmets have built-in ear guards, and often clear plastic goggles or thin nets to protect your eyes from flying wood chips and dust.

Protective earmuffs

Gasoline-powered saws are incredibly noisy, and prolonged use can cause hearing damage. Whether you use gasoline, electric or battery, always wear protective headgear.

Protective pants

Protective helmets have several layers of special fabric designed to slow the chain down by catching it. This cloth cannot completely block the path of the rotating chain, but by slowing its progress, the injury sustained will be less serious. The of chainsaw safety pants vary greatly.

Chainsaw gloves

Protective gloves have the left hand reinforced with a special protective fabric, which is used in chainsaw pants, and the right hand is usually less protected because it is further away from the blade. They are designed to protect your hands, but remain flexible enough to work comfortably.

Protective boots

Buy a pair of safety boots that have a steel toe and good grip to prevent accidental slipping when you’re using a chainsaw.

How to avoid premature breakdowns

The most important requirement when using a chainsaw to help avoid malfunctions and premature breakdowns is to follow the recommendations for using the tool.

Recommended use of a chainsaw and purchase guidelines:

  • air temperature from.20°C to 40°C;
  • Use up to 80% humidity;
  • do not operate the chain saw at altitudes of up to 1000 m. above sea level;
  • Do not overload the chain saw with heavy loads for a long time without turning it off;
  • use your chainsaw for cutting wood, boards, twigs, wood products;
  • Do not cut materials other than wood;
  • if your chainsaw has reduced cutting performance, adjust the chain sharpness and check the tension in the chain;
  • Do not allow the chain to slack, and retighten the chain as necessary after extended use;
  • Make sure there is a constant supply of oil to the chain and bar;
  • Use high-quality lubricants and fuel to extend the life of your chainsaw engine;
  • In winter, let the chainsaw warm up for a short time after starting it;
  • start your chain saw preferably with a full tank of fuel;
  • When buying the tool from official dealerships, brand stores and retail stores, demand a check of the chainsaw’s performance, check the package contents;
  • Your dealer should put his stamp on the warranty certificate.

STIHL MS 362 C chain saw

Do not use your chain saw in these conditions:

  • If there is source of gas, fire or high voltage near your work area, do not start the tool;
  • Do not cut in rain, heavy snow or bad weather. high winds, hail, etc.д.;
  • Do not use a chainsaw while intoxicated or without proper equipment.

Sequence of actions when starting

After having prepared your chainsaw as explained above, start the engine by following these steps:

  • Engage chain brake. This is for the safety of the operator.
  • Close the choke. There is a lever with the symbol of the carburettor choke on the chainsaw for this purpose. It must be moved to the position corresponding to the closed flap. The small amount of air required for starting will come in through the opening in the damper.
  • Pump up the fuel mixture. If your chainsaw has a primer bulb or primer bulb, press it several times to get fuel mixture inside.
  • Switch on ignition. It is usually the rocker switch or the button marked ON and OFF. Turn it to ON.
  • Tighten the recoil starter grip until resistance is felt. Do not try to pull too hard right away since this could break the starter gears.
  • Pull the starter grip several times. With moderate intensity. If you pull too hard, the engine will not start. Pulling too hard and too sharply can damage the starter mechanism. On saws that do not have a primer, the number of tries to start should be increased.
  • Open the carburetor air damper. When the engine “seizes up”, “shows signs of life”, “burbles” and so on. turn the choke control lever to the operating position (the choke is open and the air comes in in full volume).

If the chainsaw is in good working order, the engine should start in 2-4 tries. Allow the cold engine to warm up for a minute at idle before starting.

To understand how a chainsaw works, you need to consider its structural components.

  • engine. equipped with a crankshaft, cylinder and piston;
  • the manual starter. consists of a coil on which a rope is wound. A spring is provided in the mechanism to return the spring to its original position;
  • fuel system. includes a carburetor and fuel hoses;
  • Clutch. required for continuous communication between the engine and the chain saw’s cutting units;
  • ignition. responsible for supplying the spark needed to ignite the fuel mixture;
  • The chainsaw headset consists of the bar and the chain;
  • Lubrication system. is required to supply oil to the headset;
  • tensioning mechanism. required to adjust the chain on the bar.

The basis of work of a chainsaw consists in action of the engine which functions on a fuel mix. When the starter cable is pulled, the ignition system is triggered, which generates a spark and transmits it to the cylinder. There, the fuel ignites and actuates the piston, which in turn starts to turn the crankshaft. That, through the clutch mechanism, makes the saw’s organs turn.

An oil pump is responsible for the stable operation of the headset in conditions of high friction and heat, and feeds grease into special grooves provided in the bar. From there, the oil is evenly distributed to the chain. Thanks to this principle, the bar and chain can withstand heavy loads and work in extreme conditions.

To stop the guide bar and chain to reduce the risk of injury to the operator, the chain saw has an inertia brake. It is triggered by a kickback caused by the chain coming in contact with a nail or wire.

Safety instructions for chain saws

1.1. To put on overalls and other personal protective equipment (PPE).И.З.). 1.2. Fence off work area, put up warning boards, provide working area with fire extinguishing means. 1.3. Check:. The chain saw is in good working order;. The chain and the chain brake handle are in good working order;. The throttle trigger locking lever is functional;. The chain catcher is in good condition if the chain is broken;. Check that there are no bystanders near the work area;. Check: 6 2 After you finish refueling, firmly tighten the cap on the vibration suppression system;. Proper operation of the switch, muffler. 1.4. Fill the saw with gasoline. Do not use an open flame when filling with fuel. After refueling is complete, tighten the cap securely. 1.5. Before starting the chainsaw engine, always move it away from the refueling point and allow the engine to idle. 1.6. Check that there are no bystanders near the workplace.


2.1. After the inspection, making sure that the chainsaw is in good working order and that there are no people or animals present, you may start felling. 2.2. Always hold the saw firmly with your right hand on the back handle and your left hand on the front handle. 2.3. Wrap your whole palm tightly around the handles of the saw. This grip should be used whether you are right-handed or left-handed. This grip reduces the effect of kickback and keeps the saw under control at all times. 2.4. Kickback most often occurs when cutting limbs. Always be in a stable position and make sure that you do not have to stagger or lose your balance. 2.5. Ignorance can cause kickback if the kickback zone touches branches, a nearby tree or another object. 2.6. Do not lift the saw above shoulder height and do not saw with the tip of the circular saw blade or use one hand. 2.7. Be especially careful when cutting with the top edge of the saw blade, t.е. when sawing from the underside of the object. This method is called pull-through sawing. A jolt may occur in such cases. At this point the chain tends to push the saw in the direction of the operator. You should therefore apply sufficient counterforce at this point 2.8. Do not operate a chain saw if you are tired or have been drinking alcohol. 2.9. Avoid working in bad weather (thick fog, heavy rain, thick mist, strong wind). Working in cold weather is very tiring and causes additional risk. 2.10. Be careful when pruning small branches and try to avoid sawing shrubs. Small branches may be caught in the chain and thrown in your direction, causing serious injury. 2.11. Use extreme caution when cutting loaded or stressed branches and logs. A log or branch can suddenly return to its natural position, which can lead to loss of control and serious consequences. 2.12. Always work at full throttle when sawing. 2.13. After each sawing operation the idle speed must be reduced. 2.14. When sawing, you should perform:.so that the saw blade is not trapped in the kerf;.Make sure that the log does not split;.The saw chain should not catch the ground or other object during or after sawing.Check whether there is a risk of kickback;.Whether the conditions affect the safety of your work. 2.15. Choose a direction for felling the tree. the most convenient for subsequent delimbing and trimming. You can fall the tree to the ground. where it can be moved relatively safely. 2.16. Do not allow the tree to fall onto other trees. 2.17. Make sure that when the tree is falling you are not hit by a splintered tree or dried limbs. 2.18. During demanding felling jobs, you need to raise your hearing protector as soon as you finish sawing in order to hear the sounds and warning commands. 2.19. Three cuts are made for felling a tree. First make the felling notch, which is made up of the top and bottom kerf. Then make the main cut. By making these kerfs correctly you can control the direction of fall quite accurately. 2.20. The possibility of influencing the direction of fall is completely lost if the fracture strip is too narrow or if the guide and main kerf are poorly placed relative to each other. 2.21. Before carrying the saw, turn off the motor and lock the chain with the chain brake. Always carry the saw with the sawblade facing backward and the chain guard in place. 2.22. Do not lower the saw while the engine is running until the saw is out of sight and the chain brake is off.


3.1. If the chain is jammed in the kerf:.stop the motor;.Do not try to pull the saw out of the clamp. So you might damage the chain if the saw suddenly comes loose. Use some kind of lever to open the kerf and remove the blade. 3.2. If you are injured while using a chain saw, go to a doctor or call an ambulance and notify the foreman.


4.1. At the end of the chainsaw’s operation it is necessary to:. clean the chainsaw from the outside;. Clean chain brake;. Clean the air filter;.Check the starter motor and cord for wear or damage;.Check that the switch is working;.Clean the spark plug;.Clean the cooling fins of the cylinder;.Check that all nuts and bolts are properly tightened. 4.2. Inform the supervisor of all observed failures of the torch and the measures to be taken. 4.3. Remove protective clothing, wash hands with soap and water [6].

Correct use of chain saw!

In our article we will tell about what a person should know when using a chainsaw. We also tell you why you should know that.

A chainsaw is a dangerous tool and should be used with extreme care. Before starting the machine for the first time, read the manual carefully.

Cleaning the chain saw

After every use clean the saw from sawdust and oil from under the chainwheel cover and wipe the inside of the cover. Otherwise the sawdust can be compacted and is difficult to get out.

Changing chains, sprockets and guide bar

For even wear of the sprocket chain and bar, we recommend having two chains in stock. If handled correctly the sprocket is designed to work with two chains and then the sprocket and both chains need to be replaced.

The chain treads on the drive sprocket during operation, which causes the chain pitch to increase and then gradually worsens to the pitch it actually is on the sprocket. If you put a brand-new chain on an old sprocket, the chain pulls out in a big way, which can even cause it to break.

A simple rule of thumb: 4=2=1. on average there are two sprockets and four chains per tire.

Proper chain tensioning

You must not allow the chain to slacken at any time. To check if you have overtightened the chain, pull the chain with your gloved hand or a cloth. When tensioning is correct, the chain will move with just a little effort.

If you notice the chain is slack during operation (if it is hot), stop the chainsaw and retighten the chain. Always relieve tensioning after work! The chain will start to cool down and pull on the bar, if it is too tight, it could break.

Proper handling of the bar

For even wear of the bar it is necessary to turn it as well as to change the chain (provided that there are 2 chains!).

Air filter

The air filter should never be washed in gasoline or acetone, as this could compromise its integrity. The filter should be cleaned, if during the operation of the saw has become noticeable loss of power. If it becomes damaged you need to replace it. That is why it makes sense to buy additional air filter as a spare when you buy a chain saw.

Saw lubrication

It is best to use original oil for your chainsaw. It is designed specifically for use with your brand of chainsaw and will not cause any damage to the internal components. Its use is absolutely safe.

The oil tank should not be emptied as this would have a negative effect on the bar and chain.


Please note that gasoline or blended fuel should not be stored in unapproved plastic containers! Fuel can be stored in special fuel canisters (for example, Husqvarna has special canisters: Gasoline canister green, 6 liters, Gasoline canister orange, Combination canister). Gasoline is a corrosive medium, and if the plastic the container is made of is not designed to hold it, gasoline begins to corrode it. Tiny particles of dissolved plastic pass through the fuel filter and get into the carburettor, clogging the jets. A carburetor that is clogged with plastic cannot be repaired.

Diluted fuel mixture can be stored for no more than one month (your saw’s manual says 3 months, but this corresponds to European quality gasoline). As practice shows. 1 month. the optimal storage period for domestic gasoline in the absence of direct sunlight on the tank with fuel and temperature differences.

Before storing the chainsaw for an extended period of time, the fuel must be drained and the tool idled to burn off any fuel residue in the tank.

Why it should be done?

The gasoline evaporates from the carburetor during storage and oil remains in the carburetor. The diaphragm in the carburettor is responsible for priming the fuel and can become jammed, which makes the machine difficult to start.

How to sharpen a saw chain?

In case you are going to sharpen the chain indoors, clamp the bar in a vice (it won’t hurt the bar). If you don’t have a vice, you can purchase a clamp.

If the number of links on the chain is not divided by 4, it is better to start sharpening the chain with two links in a row, otherwise you will have to count the sharpened teeth).

Choose a tooth that is bent away from you. The jaw should be set at a right angle to the guide rail. The 30° jaw should be parallel to the bar. Make two or three movements from yourself with the file. This way you sharpen one cutting tooth, then turn the saw over and sharpen the second part. Remember to rotate the file periodically and remove chips to keep it evenly worn. On the holder you indicate the chain pitch and the diameter of a suitable file. And don’t forget to make sure you don’t drive the file notch over the fasteners, or it will cut them.

Do not allow the saw to operate at half speed or at idle speed! Do not use half throttle or full throttle!

The reason is that when working at half throttle or idling, the fuel mixture is not fully consumed and coking occurs on the rings, piston, exhaust port. When the coke on the exhaust becomes too much, a piece of it will break off and fall into the piston group.

Fire hazard rules

The chainsaw runs on a mixture of gasoline and oil, which is a flammable substance. Careless handling of fuel can cause serious thermal burns, food poisoning, and loss of property.

Follow these instructions when preparing the fuel mixture and filling up your chain saw:

  • Do not mix gasoline and oil in the same container as you would use for any other purpose.
  • To reduce the risk of fire and explosion, do not operate your power tool without first opening the cap on the fuel filler cap. Loosen the cap a little at first, and only after the air is bled off, continue to unscrew it completely.
  • Always refuel outdoors, away from open flames.
  • Use a fuel can with an appropriate nozzle size.
  • Visually check the fill level in the fuel tank. do not overfill.
  • If fuel does get on the surface of the tool, wipe it off thoroughly with a dry cloth.
  • After use, pour out the remaining fuel mixture.

When you are handling gasoline for your chainsaw, do not

  • Use canisters, plastic bottles and other containers not designed for gasoline;
  • Pour fuel mixture into the tank “overhang” without a funnel;
  • smoke;
  • fuel the tool with the engine warmed up;
  • be in an enclosed area.

Safety requirements for working with tools powered by an internal combustion engine

An employee designated by the employer to be responsible for ensuring that tools powered by an internal combustion engine are in good working order when they are issued to employees, and at least once every six months to inspect them and check their condition.

Before using a chainsaw or power saw (hereinafter. chainsaw) must be ensured:

1) The chain saw’s grip and chain brake, right hand rear guard, throttle grip limiter, anti-vibration system and stop contact are in good working order and function properly;

3) The chainsaw is undamaged, the muffler is securely fastened, and the chainsaw components are in good working order and tightened;

4) that there is no oil on the handles of the chainsaw;

The following conditions must be observed when working with a chainsaw:

1) there are no bystanders, animals or other objects in the zone of the chainsaw‘s operation, which can affect the safe performance of work;

2) the tree trunk to be sawed is not split or strained at the split-split point after the fall;

3) the saw blade is not clamped in the kerf;

4) the saw chain will not catch the ground or any object during or after sawing;

5) do not let the surrounding conditions (roots, stones, branches, pits) influence the possibility of free movement and the stability of the working posture;

6) Only use chainsaw/chainsaw combinations that are recommended in the manufacturer’s technical documentation.

To avoid additional risks and hazards, do not use your chain saw in felling or cutting wood, trees, building or installation fixtures in adverse weather conditions:

1) thick fog or heavy snowfall, if visibility is less than 50 m on flat ground and less than 50 m on mountainous ground. less than 60 m;

2) wind speeds over 8.5 m/s in mountainous terrain and over 11 m/s on flat terrain;

4) in low (below. 30 °C) outside temperature.

In case the chainsaw muffler is damaged, it is necessary to exclude contact of the worker with the carbon deposits in the muffler, which may contain carcinogenic chemical compounds.

It is forbidden to work with a chainsaw:

1) Touch the chainsaw‘s muffler both during operation and after the engine has stopped to avoid thermal burns;

2) to start the chainsaw inside the room (with the exception of rooms equipped with supply and exhaust ventilation, which is switched on before starting and working with the chainsaw) or near flammable material;

3) when starting the chainsaw engine, wrap the starter rope around your hand;

4) Do not use the chain saw without the spark arrester (if the spark arrester is required at your place of work) or with a damaged spark arrester;

5) to cut bushes and branches (to avoid entrapment by the chainsaw chain and subsequent injury of the worker);

6) to work with the chainsaw on an unstable surface;

7) lift the chainsaw above the level of the worker’s shoulders and saw with the tip of the saw blade;

When working with a chainsaw, the following requirements must be observed:

1) it is necessary to hold the chainsaw firmly by the back handle with the right hand and the front handle with the left hand, gripping the handles of the chainsaw tightly with the whole palm. This grip, whether the operator is right- or left-handed, reduces the kickback effect and keeps the chainsaw under control at all times. Do not allow the chainsaw to be torn out of your hands;

2) If the chain saw is clamped in the kerf, stop the engine. You should use the lever to release the saw to make the cut.

Do not saw stacked logs or timber on top of each other.

Sawed-off parts should be stored in a designated place.

If you put the chain saw on the ground, lock it with the chain brake.

If the chainsaw is not used for more than 5 minutes, turn off the engine.

Before you carry the chain saw, stop the engine, lock the chain with the brake and put the protective cover on the saw blade.

Always carry the chain saw with the saw blade and chain facing backward.

The engine should be switched off and allowed to cool for a few minutes before refueling. When filling you should open the filler cap slowly to gently release the overpressure. After you have refueled, close (tighten) the fuel filler cap tightly. Before starting, move the chainsaw away from the refueling point.

It is allowed to fill up a chainsaw engine in a room equipped with blowing ventilation or outdoors in a place that eliminates the possibility of sparks and ignition.

Before servicing or repairing your chainsaw, stop the engine and disconnect the ignition lead.

It is not allowed to work with a chainsaw with defective elements of protective equipment or with a chainsaw, the design of which has been unauthorized changes not provided for in the technical documentation of the manufacturer’s organization.

Do not start your chainsaw if fuel has been spilt on the frame while refueling. Wipe off any fuel that has splashed around and wait for the remaining fuel to evaporate. If fuel gets on clothes and shoes, they must be replaced.

the fuel tank lid and hoses must be regularly checked for fuel leakage.

Fuel and oil must be mixed in a clean container designed for fuel storage in the following sequence:

1) half of the required amount of gasoline is poured in;

2) the required amount of oil is added;

How To Be A Chainsaw Hero

3) mix (shake) the resulting mixture;

4) add the remaining amount of gasoline;

5) mix (shake) the fuel mixture attentively before pouring it into the fuel tank; 5) mix (shake) the fuel mixture attentively before pouring it into the fuel tank.

Mix fuel with oil in a place where the possibility of spark formation and ignition is excluded.

Before you start working with a chainsaw, you must:

1) install all protective equipment;

2) make sure that there are no people at least 1.5 m away from the place where the engine is started.

To avoid the risk of damage to health, workers with medical implants should consult their physician and the implant manufacturer before operating a chainsaw.

It is forbidden to work with a chainsaw in an enclosed room that is not equipped with a supply and exhaust ventilation.

Always keep the chainsaw on the right side of your body. The cutting part of the tool should be below the employee’s waist.

While working with a chainsaw the employee is obliged to control other people and animals approaching the place of work. If bystanders or animals approach the place of work at a distance shorter than allowed by the manufacturer’s technical documentation, immediately stop the chainsaw engine.

Do not turn around with the chainsaw in operation without looking to the rear and making sure there is nobody in the working area.

To avoid mechanical injuries, before removing material coiled around the axis of the cutting part of the chainsaw, turn off the engine.

Do not touch the cutting attachment after the chain saw engine has been switched off until it has come to a complete standstill.

If you have symptoms of fatigue from prolonged vibration, stop the saw and consult a doctor if necessary.

You should store and transport the chain saw and fuel so there is no risk of sparks or open flames coming into contact with spilled fuel or fumes.

Before cleaning, repairing or checking your petrol chain saw make sure the cutting attachment is stationary after you switch off the engine and then remove the spark plug cable.

Before storing the chain saw for a long time, empty the fuel tank and carry out a complete service in accordance with the manufacturer’s technical documentation.

Before starting work with a brushcutter (brush cutter) powered by an internal combustion engine, the cutting area must be free of foreign bodies. When mowing on a slope, the worker should be positioned below the mowing area.

If bystanders or animals get within the working distance of the cutting head within the distance specified in the Manufacturer’s technical documentation, the engine of the brushcutter must be stopped immediately.

Do not inspect the trimmer head of your brushcutter with the engine running. Before inspecting the trimmer head, the hedge trimmer engine must be switched off.

Trimmers must be fitted with an engine stop device, positioned to allow the operator to start the engine while wearing personal protective equipment and holding the trimmer with both hands.

Trimmers weighing more than 7.5 kg must be equipped with double shoulder straps to ensure equal pressure on both shoulders.

Gardeners with 7.5 kg or less must be equipped with a single shoulder strap.

A shoulder harness is not required for brushcutters weighing less than 6 kg.

When working with a brushcutter (brushcutter) it is forbidden:

1) work without the protective cover of the tool’s trimmer head;

2) Do not operate with a muffler missing or with a muffler cap incorrectly fitted;

3) operate the brushcutter (brush cutter) from a stepladder or ladder.

When working with a drill (ice drill) powered by an internal combustion engine, the following requirements must be observed:

1) it is not allowed to fuel a working auger (ice cutter);

2) as a rule, the auger (ice drill) fuel tank must be filled in the open air. It is allowed to refuel the fuel tank of the auger (ice drill) in a room equipped with supply and exhaust ventilation;

3) before starting work, make sure that all the screws and nuts of the auger (ice drill) are tightened;

4) If foreign objects get under the knife of the auger (ice drill) or if the auger (ice drill) vibrates strongly, it is necessary to stop it immediately, remove the candle cable and check if the knife and mechanisms are intact. If there is any damage, the work shall be stopped until it is repaired;

5) Personal protective equipment shall be worn when replacing the drill (ice drill) blade;

6) It is forbidden to go out on ice alone. Before going out on the ice for drilling, it is necessary to make sure that the ice is firm;

7) After you have finished drilling, you must drill into the ground or ice nearby and deepen the tool (ice drill) into the ground or ice enough so that the drill (ice drill) stands firmly, and then turn off the engine;

8) before putting the auger (ice drill) into storage or before transporting it, fuel from the fuel tank must be drained.

Date of addition: 2018-06-01 ; views: 1277 ; We will help in writing your paper!

Rule Chain, Tire, and Drive Sprocket.

We all know very well what a chain is for, yet we often don’t pay proper attention to its condition.

When the chain is blunt, the user begins to exert force on the chainsaw without thinking of the consequences. This pressure on the machine means it is overloaded, there is more wear on the piston assembly and the service life of the saw is reduced.

Remember: if the chain is sharp the chain saw works, if it is blunt you work

To keep the chain sharp it is necessary to use special devices for sharpening the chain. files. Files are available in different diameters, and are convenient to use with a bar where the sharpening angles are marked.

Using sharpening aids, you can sharpen the chain without having to remove it from the saw. This way is widely used by professionals. foresters after 2-3 refuelings.

Have two chains and use them alternately. By following this tip you keep the chain, bar and drive sprocket on the chain saw evenly worn. Also remember to turn the bar sideways. it prolongs its life.

The best way to replace the cutting attachment and sprocket is as follows:

4 chains. 2 sprockets. 1 tire

Chain tensioning also has a big influence on the machine. If the chain is poorly tensioned, there are consequences:

The tire in the toe area and the drive sprocket will wear out badly;

the service life of the needle bearings is reduced due to heavy vibration;

it is dangerous to your life because the chain can jump off or break.

Working with tightened chain will cause premature engine, chain, bar and sprocket wear.

Foreign makes and models require periodical lubrication of the nose sprocket with special grease. This is especially important when working with the bar nose when grooving, because the end bearing load increases by 3-4 times. It is easy to buy the lubricant already in the dispenser.

STIHL saws on the other hand use lubrication-free Ematic system guide bars, making your work much easier.

Do not work in the danger zone of the guide bar (upper 90° of the guide bar nose). This will cause the saw bar to bounce strongly toward the user, which is life-threatening. Always wear protective clothing and a hard hat. The same is true when the chain is loose and the cutter limiter tooth is badly worn.

Let’s reiterate the important points when operating a chainsaw:

b) you need to have more than one chain available and work them alternately;

c) You cannot put a new chain on a machine with a worn bar and sprocket;

e) Before working, check the tension of the chain;

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