Introduction to chainsaws

Chainsaw, short for "gasoline chainsaw" or "gasoline-powered saw". A power saw was used for logging and timber production. The cutting mechanism is the chain. Powered by a gasoline engine. Portable and easy to operate. But maintenance and repair are more complex.

We usually say that the chainsaw accessories generally include: a crankshaft, saw chain, piston, air filter, cylinder, crankcase, silencer, high-pressure packages, magnetic flywheel, and so on.

New chainsaw chain, including left cutting blade, right cutting blade, driving blade, connecting piece, and rivets. The left cutting blade, right cutting blade, driving blade, and the lower part of the connecting piece are equipped with two connection holes. The saw chain consists of a complete unit: the left cutting blade and the connecting piece are sandwiched by two rivets between the left and right driving blades; the right cutting blade and the connecting piece are sandwiched by two rivets between the left and right driving blades; the other two connecting pieces are sandwiched by two rivets.

The other two connecting pieces are connected by two rivets in the holes of the drive pieces in the above two assemblies, sandwiching the two drive pieces left and right in the center, connecting the assemblies. Several saw chain units form a closed integrated chain.

The angle between the tangent face and the side face of the cutting blade is 87°-90°; the intersection line between the tangent face and the side face of the cutting blade gradually forms a small-angle arc from the middle to the end; the angle between the edge line on the tangent face and the edge line on the side face of the cutting blade is 50°-52°. The advantages of this saw chain are high efficiency, low wear and tear, low noise, and convenient selection of materials.

Hand-held wood cutting machine powered by a gasoline engine, saw chains as cutting parts. In forestry production is widely used in felling, branching, timber, and other operations.

Basic structure: generally by the engine, transmission, sawing mechanism, and other components. When working, the power drives the saw chain through the transmission mechanism, so that the saw chain is along the guide plate for continuous movement to cut wood.

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Generally single-cylinder air-cooled two-stroke high-speed gasoline engine. In order to adapt to the chainsaw in different sawing directions in different positions, the use of an oil pump with a pump membrane carburetor, the use of crankcase pressure pulsation drive diaphragm pumping oil, so that the engine in any position can be normal oil supply.

In addition, the increasingly widespread use of transistorized non-contact magneto ignition systems checks valve intake systems and other new structures, thus improving the performance of the engine.

Including centrifugal friction clutches and reducers. Reducers generally use bevel gear reducers (only for high-handle chain saws), easy to make the sawing mechanism relative to the body of the horizontal and vertical adjustment, in order to adapt to the different sawing directions of felling and lumbering needs.

Is the working parts of the chainsaw, including the drive sprocket, saw chain, guide plate, saw chain tensioning device, and insertion of wood teeth, etc. drive sprocket rotates under the power of the engine, and then drives the saw chain along the guide plate movement for cutting operations.

There are two types of saw chains: straight tooth type and angle steel type (universal type), the straight tooth type saw chain is suitable for cross-cutting wood; the angle steel type saw chain can be used for cutting wood.

Angle-type saw chains can be cut across the wood or diagonal sawing, easy to manufacture, filing, and grinding are also easier than the straight tooth type saw chain, which is the more widely used saw chain type.

Insertion of teeth is a chain saw in the sawing of the support point, it will be part of the weight of the chain saw and saw chain cutting wood reaction force, the role of the wood itself, thereby reducing the operator's labor intensity.

In order to facilitate the operation of chainsaws, chainsaws are also equipped with manipulation devices, including the saw handle.

Chainsaw

Development trends

The use of new materials, new technologies, and new structures to further reduce the weight of the chainsaw; reduce noise and vibration, and reduce air pollution, in order to improve operating conditions; additional safety protection devices to improve the use of reliability and safety; at the same time, will continue to improve the rotor engine-powered new chain saws and remote-controlled chain saws.

Features

1, streamlined body design based, embedded flat rear handle, grasp comfortable, more humanized

2, high hardness rotary bevel gears, the use of advanced technology, low noise, running sound smoother.

3, self-locking switch, good safety, equipped with a straight handle at the same time plus the main handle, grasp more firmly.

Application

It is used for forest logging, timber making, branching, etc. as well as timber making in storage yards, sawing, and cutting of railroad sleepers.

Performance

Chain saws have many advantages such as high power, small vibration, high sawing efficiency, and low logging cost. Has become China's forest area hand-held logging leading machinery. Chainsaw shock absorption system using spring and high-strength shock absorption rubber shock absorption. Chain sprocket form for the positive teeth, so that the assembly of the chain is more concise and convenient! Excellent and reliable electric fire device, and oil supply system using adjustable oil pump.

Super tough CS580 chainsaw, can also be engaged in large tree pruning, large materials to take wood, accident rescue, and so on.

Chainsaw

Maintenance and Attention

The chainsaw is two-stroke power, and the use of power, cutting tools, and other aspects of attention ensure the normal use of the machine: the engine is a two-stroke engine, the use of fuel gasoline and oil mixture, mixture of oil ratios are: high-quality two-stroke special oil: gasoline = 1:50 (ordinary oil: gasoline = 1:25). The gasoline should be 93 or above, and the oil should be 2-stroke oil, the symbol is 2T, must use high-quality special oil, forbid to use 4-stroke oil. It is recommended that the new machine in the first 30 hours with 1:40 (ordinary oil 1:20), 30 hours after the normal ratio of 1:50 (ordinary oil 1:25) with oil, resolutely do not allow more than 1:50 (ordinary oil 1:25), otherwise the concentration is too thin will cause the machine to pull the cylinder. Please strictly according to the machine that comes with the oil distribution pot oil distribution, not according to the estimation of random oil distribution. Mixed oil is best to use now, is strictly prohibited to use for a long time to set up mixed oil; machine before work, run at low speed for a few minutes to see the lubrication of the saw chain oil, into a line of oil, and then work. When the machine is working, put the throttle on the high speed. After each tank of oil, should rest for 10 minutes, each work to clean up the machine's bulk gasket, to ensure heat dissipation; spark plugs should be removed every 25 hours of use, with a wire brush to remove dust on the electrode, adjust the electrode gap to 0.6-0.7mm for good; air filter every 25 hours of use to remove dust, dust should be more frequent. Foam filter element cleaning using gasoline or washing liquid and water, squeeze and cool dry, and then soak in oil, squeeze the excess oil can be installed. If there is "DON'T OIL", you don't need to add oil; or muffler every 50 hours of use, remove the muffler, and clean the carbon deposits on the exhaust port and muffler outlet. The fuel filter (suction head) should be decontaminated every 25 hours.

The cutting tool part of the new machine, should pay attention to the degree of tension of the saw chain, in order to be able to promote the rotation of the saw chain, hand-held saw chain, guide teeth and guide plate parallel to the appropriate, after a few minutes, pay attention to the tensioning of the saw chain again.

Before using the safety work, no people or animals are allowed to walk around within 20 meters. Be sure to check whether there are any sundries on the grass, such as angle iron, stones, etc., and remove the sundries on the grass.

When storing, you must clean the body, drain the fuel mixture, burn the fuel in the carburetor; remove the spark plug, add 1-2 ml of two-stroke oil into the cylinder, pull the starter 2-3 times, and install the spark plug.

 When the end of the use of chainsaws, but also on the chainsaw to carry out some maintenance, so that the next time the use of chainsaws ensures work efficiency. The first is to remove the chainsaw guide plate root oil inlet holes and guide plate groove of impurities to ensure that the oil inlet holes are smooth. Secondly, the guide plate head should also be clear of debris, and add a few drops of oil.

Features

1, Gasoline should be 93 or above unleaded gasoline. When adding gasoline, the fuel tank cap and the surrounding area of the filler neck must be cleaned before refueling to avoid debris entering the fuel tank. The saw should be placed on a flat surface with the gas cap facing upwards. When refueling, do not let the gasoline spill out, do not fill the tank too full. After refueling, always tighten the fuel cap by hand as much as possible.

2, Oil Use high-quality two-stroke engine oil to ensure a long engine life. Use two-stroke engine oil of API TD or JASO FD grade quality. Poor-quality gasoline or oil can damage the engine, seals, oil passages, and fuel tank.

3, Gasoline and oil mixing ratio: 1:50, i.e. 1 part of oil to 50 parts of gasoline for 2-stroke engine oils for high-quality engines; 1:25, i.e. 1 part of oil to 25 parts of gasoline for other engine oils that meet the API TC or JASO FB grade. The mixing method is to pour oil into a fuel tank that is allowed to contain fuel, then fill it with gasoline and mix it well. Gasoline oil mixtures deteriorate, so it is important not to use more than one month's supply. Pay special attention to avoid direct contact between gasoline and skin, and avoid breathing the gasoline evaporated from the gasoline.

4, The gasoline suction hose should be replaced regularly every year.