Features of gasoline chain saws

The owners of private houses are hard-working people, they do not have to sit around. Modern tools help to facilitate physical labor. The gasoline chain saw is one such assistant. It cannot be compared to a hand tool.

Gasoline chain saws come in a variety of models. Some are intended for professional use - felling and pre-processing. Others serve individuals, are lightweight, take up little space and consume a minimum of a combustible mixture. Still others occupy an intermediate position - they are more hardy than household tools, but less powerful than professional ones.

Professional tools are ready to work daily for 8 or more hours and are widely used in construction. A semi-professional chainsaw cannot work an entire shift without long breaks.

A two-stroke engine is required to drive the mechanisms. The fuel tank should be filled with a mixture of gasoline and oil. Different types work with different oils. The proportions of the flammable liquid are set by the manufacturer.

So, domestic tools operate on a mixture of 76 gasoline and motorcycle oils with a ratio of 25: 1. Foreign models require higher quality brands of gasoline: A92, A95.

For most units, one filling of the combustible mixture and lubricant is enough for 40 minutes of continuous operation. Leading manufacturers use cutting edge technology to extend operating time by reducing fuel consumption. The savings can be up to 20%.

The indisputable advantage of chainsaws is the facilitation of physical labor. With their use, productivity increases significantly, and the solution of tasks is accelerated. The power of the units reaches 6 kW, which makes it possible to cope with very hard materials. The tool is easy to transport, it is used in various locations, does not depend on the availability of electrical energy.

The disadvantages include:

• noise during operation;
• strong vibration;
• exhaust gases - as a result, restrictions on working in an enclosed space;
• frequent refueling;
• the impossibility of obtaining accurate cuts due to the bulkiness and high weight.

Despite the many types and models, the principle of operation of all tools is the same. The main units are “packed” in a reliable case. Carrying and holding the tool during woodworking is done by the handles. The design, power and weight of technical products are different. Some are equipped with additional options.

Each saw is equipped with a single-cylinder internal combustion engine, only in some it is located vertically, in others it is horizontal. Vertical placement is considered classic, it is often found, this technique is more convenient to use.Horizontal placement is typical for compact tools that can be used in hard-to-reach places.

The combustible mixture is supplied to the internal combustion engine from the gas tank through the carburetor through the fuel line equipped with a filter. If necessary, the hand pump is used for priming. The carburetor mixes fuel with air. The resulting flammable mixture enters the engine through the valve. Fuel is ignited by a spark from a spark plug. The starting of the internal combustion engine is provided by the starter.

A sharp pull on the starter handle causes the crankshaft to spin. The piston compresses the mixture and the spark ignites it. The motor starts, the saw moves. The spring returns the handle with cable and drum to its original position. Often, such a manipulation is carried out 2-3 times.

During operation, you need to monitor the condition of the fuel, timely cleaning of filters. The equipment requires periodic inspection and maintenance. This is the only way it is able to work effectively throughout the entire service life set by the manufacturer.

A review of chainsaws has identified the leaders among professional, semi-professional and household tools.

The “Calm” technique was recognized as the best for professional use. The best is the MS 661 chainsaw.... This enhanced model with a 5.4 kW motor is capable of operating in harsh conditions. No other models will cut wet frozen wood in forty-degree frost.

The main advantages of "Calm 661":

• a filter with the smallest pores, which prevents the penetration of the smallest dust particles;
• decompression valve to facilitate starting;
• adjustable chain lubrication pump;
• heated carburetor;
• the ability to instantly stop the chain;
• captive nuts;
• quick-opening tank lids.

The listed options made the chainsaw as efficient and convenient as possible.

Slightly lower indicators have Swedish Husqvarna 395 XP... With an engine power of about 5 kW, a saw with a recommended tire length of 0.9 m can cut trunks with a diameter of more than one and a half meters.

Both companies produce high-priced chainsaws for professional, semi-professional and domestic use.

The Champion brand is famous for more affordable prices.

The popularity of the Champion 265 saw is due to:

• relatively low cost;
• ease of maintenance;
• accelerated engine with easy start.

Quality and reliability are inherent Japanese saws Echo... Everyone is good at technology, but for central Russia, and even more so for its Asian part, it is unsuitable in winter, as it is "afraid" of cold weather.

Another "Japanese woman", "Makita", has proved to be excellent.... On frosty days, she also works with difficulty. Small household items are very popular with summer residents and residents of the private sector. Makita starts up quickly with electronic ignition. The vibration damper ensures comfortable operation, the automatic chain lubrication system provides easy maintenance, and the inertial brake ensures safety.

Of course, do not forget about domestic instruments. "Druzhba" and the more powerful "Ural" developed on its basis are also widely used in our country.... The main advantage of domestic models is the development of structures for local conditions. Chainsaws are easy to maintain, reliable in operation, and unpretentious to repair.

When choosing a chainsaw, it is better to first decide on its power.

• For household use, tools with internal combustion engines with a power of up to 2.0 kW and a volume of no more than 50 cm³ are suitable.People living in a private house need a small saw regularly, but not for a long time.
• For semi-professional operation, you should pay attention to models with an engine power of up to 3.0 kW and a volume of up to 70 cm³. Suitable for the construction of a wooden house or a bath.
• For professional use, you need expensive heavy chainsaws weighing from 4 to 6 kg. Internal combustion engine power varies within 4-6 kW, and volume - 70-90 cm³. Acquired by large industrial enterprises, artels. The high cost is justified only with intensive use.

It is important to choose the right blade length. The ability to work with wood directly depends on it, in particular - sawing logs. Models with a very long tire are not always convenient.

If the power is insufficient, the efficiency of chainsaws with long blades decreases. It is more convenient to use tools in which the motor is located in the longitudinal direction. It is desirable that the handle is covered with a non-slip pad.

The cutting mechanism of the tool is driven by a two-stroke engine. Before pouring a combustible mixture into the tank, you need to dilute the gasoline with oil. Using only gasoline will damage the saw. The two-stroke engine is designed without a lubrication system.

For normal operation, the rubbing parts (crankshaft, piston, bearings, connecting rods) need lubrication. It is not enough just to dilute gasoline with oil, it is important to correctly observe the proportions of the two components. The exact ratio is indicated in the passport of the technical device... It differs from manufacturer to manufacturer. Therefore, it is important to adhere to the established rules. Lack and excess of oil are equally contraindicated.

For mixing, a container of a larger volume is required. First, fill in half the volume of gasoline, then the measured oil, then the rest of the gasoline. The container is closed with a lid, and the contents are shaken well. When refueling a new tool for the first time, as when working in cold weather, add 20% more oil.

Before pouring the finished fuel into the tank, the saw is placed on a flat horizontal surface. The tank cap must be clean, and the tool must be thoroughly cleaned of sawdust and other contaminants. Otherwise, foreign bodies can get into the mixture, which is unacceptable. The filling is carried out through a funnel. It is important, given the small size of the tank, to prevent overflows. The container should not be filled to capacity.... When closed, the lid goes inside the tank, so some of the fuel may be pushed out.

After filling the gas tank, fill in the chain lubricant. Both liquids are consumed in the same way, therefore they must be refueled at the same time. Failure to comply with this condition leads to a decrease in the operating time of the devices due to their unproductive refueling.

In the next video, you will find a choice of an inexpensive chainsaw.