Hammer use and maintenance (a)

Hammer is the use of special mechanical means of rotation of the motor into a rotational movement with a bit of shock. At present domestic and foreign production and use of hammer, basically electroporation air cushion principle, the use of the relative movement of the piston and the cylinder, continue to compress and release the gas (using a pressure difference) push the hammer blow drill, complete the drilling operation of the inner hammer motor rotary motion into reciprocating motion, mainly through the crank linkage to achieve.

At home and abroad Hammer specifications 22ram 22 and above, most of the use of Crank relatively large size of the institution, its internal usually also has a pair of bevel gears, but the agency is also relatively large transmission torque. The pendulum bodies are smaller and more compact structure, but used for transmitting torque smaller hammer 22mm or less. Hammer is mainly used to drill and 22mm the following 22 foreign hammer can also be metal and wood holes in concrete masonry and other materials, some of the small size of the hammer can also be used as a screwdriver when breaking concrete or rock, now there are two theories: one is to use a larger impact energy smaller impact frequency; another with a smaller impact energy, the larger impact frequency.

Practice has proved that the two theories can play the role of broken concrete and rock, but must meet the minimum impact energy, impact energy is too small if you can not get the normal drilling efficiency.

We had a hammer impact mechanism and drilling parameters on the impact energy efficiency and the impact hammer drill matching speed and impact frequency for drilling efficiency of two research topics, get the best from a large number of tests and calculations many manufacturers also value this hammer been studied, and therefore should not be adjusted during maintenance.

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Do you know special chain saw?

Special chainsaw can cut concrete, brick and natural stone. These use a similar chain ordinary chain saws, but with cutting edge embedded with diamond grit. They may be used gasoline or hydraulic power, since the high friction and lubrication of the chain of the water, and removing the lime dust. The machine used in construction, such as a wall or floor cutting deep square hole in the pre-carved stone carving process to stone chunks, obtained from the fire department from entering the building and restoration of buildings and monuments, and to minimize damage to surrounding structures removing means. Recent concrete saws have also been developed for the 230-volt electric motor.

Due to the non-fibrous material to be cut, there is much less chance of kickback. Thus, the most common method of cutting is cut by pushing the blade tip into the material. In this way small as a square cut blade widths can be achieved. If a change block, cut by nearly kneading knife, but overall the machine than wood cutting chainsaw so dangerous, can occur push back.


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The Working techniques for chain saw Part Ⅱ

Release - this one worked very fallen tree, it may have become trapped in the other trees. Working to determine the position of maximum tension release tension safest way possible and winch complex case is necessary. To avoid the straight cut through the tension of the tree, cut one or two points of tension in deep enough to reduce tensions may be necessary. After the release of tension, the outer curved incision.

Limbing - This is a branch cut logs. The operator must be able to properly reach the cut off to avoid kickback.

Adversity - This is a cross-cut the log segment. Installation program, in order to avoid changing the log and the pressing inner tension binding chainsaw. Safety is the beginning of the log bucking the high side, then part of the work in an offside position toward the butt end. Offside logs decreased, so that gravity to help prevent binding. Watch while reducing incision movement log can help is binding. Other equipment (elevator, bar, wedges and winches) and special cutting technology can help prevent binding.

Combination - this is when the chain saw is in danger or in the log compression card. Log bound Chainsaw is not safe, it must be carefully removed to prevent damage to the equipment.
Top Binding - at the bottom of the log areas of tension in the above compression.
Bind the bottom - in the log at the top of the tension zone, located at the bottom of the compression.
Fang Bind - sideways pressure is applied in the log.
End Binding - Weight compress the entire cross-section of the log.

Brushing and sizing - which is under five inches quickly clean up the small-diameter trees and branches. Stacker can be followed by a hand removed debris.


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The Working techniques for chain saw Part Ⅰ

Chainsaw Training is designed to provide technical knowledge and skills to work, the safe operation of equipment.

Sizeup - This is the felling direction reconnaissance and planning security cuts danger zone and retreat path, start the saw. Tree location to other objects, support and secure the tension drop, split offs, or if the saw will jam. To consider several factors: lean and bent tree, wind direction, branch arrangements, snow load, barriers and damaged part of the tree to rot, which may result in unexpected behavior when cut. A tree might fall to its natural direction, if it is too dangerous or impossible to fall in the desired direction. The aim is to limbing a tree falling in love with logs and cross safely. Our goal is to avoid obstacles to make another tree or a tree falling. 

Cutting - Clear basis undergrowth tree retreat road, direction felled; cut properly completed three major cuts. To control the fall, directional shear line should run 1/4 of the diameter of the trees, a 45-degree wedge, which should be 90 degrees, and feel perfectly horizontal direction. Then top off the first undercut is made to form a wedge directed at the cutting line. Narrow or non-existent hinge mitigate deforestation directional control. From the opposite side of the wedge, and plans to complete the final cut tree felling diameter of 1/10 from the direction of the cutting line. Said undercut; felling cut horizontally and slightly inch (5.1 cm 1.5 to 2 inches) is made. When the hinge is correctly set, cutting down will start to fall in the desired direction. Sitback when the tree is moved back opposite to the predetermined direction. Felling wedge in place to prevent sitback cut from pinching the saw.


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How to use chain saw safely?

Although the security features and protective clothing, injuries can still arise from chainsaw use. Generated from the large forces involved in the work, from the fast-moving, sharp chain, or from a mechanical vibration and noise.

A common from kickbacks accident, when the front end of the element of the guide bar wooden capture, without cutting through it. This led to the upward arc toward the operator that can cause serious lever (having their mobile chain) injury or even death.

When the weight begins to drop or cut wood Another danger occurs before the end of the shift. - Chainsaw operator may be trapped or crushed. Similarly, the falling timber unplanned direction may harm the operator or another person or an operator working at a height may fall or falling timber injuries.

Like other handheld devices, chain saw operation will cause vibration white finger, tinnitus or industrial deafness.

Risks associated with chainsaw use mean while operating their protective clothing, such as boots chainsaw, chainsaw trousers and usually wear hearing protection, many jurisdictions require operators to authenticate or authorize the use of chainsaw work. Injury can also result during operation due to poor maintenance, or attempted to cut strand breaks inappropriate material.

Gasoline-powered chain saw operators harmful exposure to carbon monoxide (CO) gas, especially indoors or in partially enclosed outdoor area.

Voltage starting, or discard it with one hand, while with the other pull the starter rope to open the chainsaw, is a safety violation in most states in the US saw steady hands are safe chainsaw use is essential.

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The Maintenance of chain saw

Two-stroke chainsaw oil need about 2-5% in the lubrication of motor fuel, and in the electric chain saw motor typically lubricated for life.

Single chain oil or oil bar for bar and chain lubrication for all types of chain saw. Chain oil was quickly exhausted, as it tends to a centrifugal force from the chain, which is absorbed by sawdust. Two-stroke chain saw chain oil reservoir is at the same time as the fuel is usually full. Reservoir is usually large enough to provide sufficient chain oil between refueling. Lack of chain oil, or use of incorrect oil viscosity, is to chain saw damage to the common source, and often leads to rapid wear of the bar, rod or chain seizure or loss. In addition to being relatively thick, sticky oil is particularly chain (As the "tackifier" additive), to reduce the amount thrown off the chain. Although oil is a common emergency alternatives, it's even faster leaf loss and other lubrication chain.

Chain must be kept sharp to perform well. They quickly become blunt, if they touch the soil, metal or precious stones. When the blunt, often produce powdery sawdust, instead of the long, clean wood shavings characteristic sharp chain; sharp saw little need to force the operators to push it into the cut. Special soil hardened chain (tungsten carbide) is used to cut pollution where possible, such as those used by root cutting applications.

Air intake filters are often clogged with sawdust. It must be cleaned from time to time, but not a problem during normal operation.

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The Construction of chain saw

A chainsaw consists of several parts:

1. Engine - almost always a two-stroke gasoline (petrol) engine, usually 30-120 cc cylinder volume or motor.

2. Drive mechanism - usually a centrifugal clutch and the sprocket.

Guide rod - wear-resistant alloy steel is usually 40-90 centimeters (16-36 inches) long long round ends. A side guide groove cutting chain. Professional cycling-style bar, called the bow stem, is also used at the same time, bucking logs and cleared brush, although they are now rarely encountered due to the increased risk of surgery.

3. Cutting chain - usually in each such segment (which is similar to a bicycle chain from riveted metal sections composed, but no roll) with a small sharp cutting teeth. Each tooth form folded labels need chromium plated steel with sharp corners or curved corners and two cutting edges, one at the top plate and a side plate. Teeth alternately left and right chain. Chain in a different pitch and meter; a chain pitch is defined as any three consecutive rivets (for example, 8 mm, 0.325 inches) across half the length, and the meter is that it fits into the guide bar drive linkage thickness (e.g., 1.5 mm, 0.05 inches). Traditional "full" chain link having two drivers each tooth. "Skip" link in the chain drive every three teeth. Built to ride in front of each tooth is teeth and limit the depth of cut, typically to about 0.5 mm (0.025 ") depth gauge is safe operation of critical chain depth gauge or" rake ", if the left is too high they will result in very slow cutting after that, if filed too low chain will become more prone to return to the lowest depth gauge will also lead to the saw excessive vibration. vibration is not only uncomfortable for the operator, but also detrimental to the saw.

4. Tensioning mechanism - some way to adjust the tension in the cutting chain, so that it is neither binding nor loose from the guide bar.

The lower side of each link has referred to as "the drive link", which is located in a small metal finger chain of the bar to help carry around the rod lubricating oil, and the inner body of the saw chain drive engine gear engagement. The engine through a centrifugal clutch in the vicinity of the track of the chain drive, the chain under power engagement engine speed increases, but it is allowed to stop with the engine speed slows to idle speed.

Significantly improved since chainsaw safety equipment and overall design have taken place, the invention of the chainsaw, saving many lives and preventing countless serious injuries. These include chainbrake system, better chain design and anti-vibration systems. With chainsaw carving has become more popular, chainsaw carving manufacturers are making very short, narrow tip of the bar. These are called "down season", "nickel-down" or "tipped the iceberg" on the basis of the rod, round tip size. Echo chainsaw manufacturer sponsored the carving series, and engraving such as the former singer Qie Like fled inside. As the number of chainsaw RedMAX G3200 CV is designed for carving build applications.

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Taizhou Bak Industry&Trading Co., Ltd. 
Add.: Tianshi mansion, Luqiao district, Taizhou, Zhejiang, P.R. China 

TEL:86-576-80255132                        Fax: 0086-57680256656  

M.T&What's APP:0086-13958663592      Skype: sales6jennifer 

Email: sales6@tzbak.com