Maintenance and maintenance of chain saw (3)

1. Should be stipulated in the product manufacturer of machine instruction manual is provided, correct maintenance.

2. Remove all clippings, soil particles and sundry.Check for loose fasteners, the phenomenon such as missing parts.Check whether the leakageOil.Should be cleaned after each use of the blade, and oil.Dirt adhering to obsolete, you should clean oil again after immersion and brush.

3. The fault check: common faults generally divided into the engine won't start or starting difficulties;Output power is insufficient, gear box overheating, etc.According to theCheck and repair machine specification.

4. Work in normal circumstances, excessive wear and tear parts serious deformation, fracture, parts, parts failure, etc., areBig fault, without thorough repair, may not continue to use.

5. The main failure mechanism and transmission parts, excluding time should be less than 1.5 hours.Abnormal failure happened at ordinary times, eliminate time below 1.5 hours (0.5 hours) is called the fault.Failure occurs, the allowed in class assignments repair downtime at work, and then continue to use.

6. Found in the working process of the loose fasteners, electrical phenomenon such as poor contact, called the small fault.In influencing quality of work and job security, however, allows temporary continue to work, to work again after the completion of repair or adjust.

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Maintenance and maintenance of chain saw (2)

Maintenance of starting device 

1. Change when starting rope or starting spring, the first thing to release starting spring pre-tightening force.
2. Be careful when remove starting line from the start of spring, prevent spring scatter pop-up cuts.
3. After the change, will be starting spring and starting wheel axle hole before assembly place daub grease, assembled again.

Maintenance of saw chain guide 

1.The file after the saw chain wear, and repair the file when in the right direction, and should be paid attention to about the Angle of the tooth, avoid running deviation when sawing;Ensure the set limit to the height of the tooth is consistent, so as not to beat.
2.Guide work after a period of time to also want to maintain and repair the file.
3.Check wheel rotation is flexible;Timing for roller bearing with grease, each add a fuel must give at the same timeRoller bearing is filling the complex lithium grease;Check the guide oil hole blockage, dredge and cleaning in a timely manner.
4. The guide is often used in surface, in order to make sure on both sides of the guide plate wear synchronization to extend the service life;"In" flash" groove guide timely repair the file.

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Maintenance and maintenance of chain saw

1.Maintenance and maintenance of the fuel supply system

1.Cleaning tank regular , fuel filter, check whether the tubing is unblocked and aging and replace if necessary.

2.Cleaning air filter everyday , and according to the working condition to increase cleaning frequency. 

3.Carburetor is the most important components of the chain saw the fuel supply system, carburetor should be regular maintenance, ensure the oil duct unobstructed, adjust to all is right.

2. The cleaning and check of cylinder, piston

1.after use chain saw 100 hours, cylinder, piston should be clean,  and check the grinding of cylinder,piston ring and other components .

2.Check whether there is any scratch on the cylinder wall, flaking. Put on the piston ring cylinder block in the work area to check clearance shall not be more than 1 mm .Check the needle bearing if damaged.

3.Washing cylinder, piston, bearing, pay attention to remove the piston top, top ring groove, cylinder, in the place such as porosity, pressure reducing valve Carbon deposit.

4.The piston pin hole, the place such as needle roller bearing, cylinder wall thin coating lubricant, the piston at the top of the arrow to vent, mount the spring of piston pin.

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​Common power tool accessories models

​    Each power tool accessories should be used:A rotor, a stator, gears, bearings, switches, brushes, carbon brush, carbon brush cover, the power cord.

    Common bearing model

    606,607,608,626,627,628,629,6000,6001,6003,6004,6200,6201,6202,6203,6303,61907,688 etc.

    ​Common Brush Model

    ​50 #, 408 #, 43 #, 44 #, 303 #, 21 #, 6M, etc.

    ​Common Switch Model

     ​4A (locking, no lock), 5A (locking, no lock), 10A (locking, no lock), Bosch 100, Hitachi 100,4100,03-22,41-26,05-100,2414,75116,etc.

Chainsaw safety clothing Part Ⅰ

Chainsaw safety practices generally recommend users to wear protective clothing, also known as personal protective equipment or PPE, while operating the chain saw.It is generally what the world garments are suitable, but local jurisdictions have specific rules and recommendations.

Helmet
The helmet attempts to protect to protect the user's head on the cutter and rebate should occur chainsaw impact. If the chain brake stops the tool chain operations running at full speed could easily cut your helmet chain protection to succeed. Helmets can be prevented by a small falling objects, such as from a tree has been cut down the impact of a litter.

Exposure to the sun can cause therefore recommended that helmets be replaced every 3--5 years plastic helmet decreases with time. Helmets usually have a sign inside that it is when. Now there are a lot of helmet stickers exposure light fades, so when subsided, should be replaced.

In the EU, the helmet should meet the requirements of EN397.

Visor or goggles
A visor or goggles to reduce the chance of the chip through the eye of the user.

Relatively fragile mesh bezel, and it does not completely cover the face, because the chip is produced by the well-maintained chainsaw relatively uniform size and speed can be acceptable. Unlike other woodworking tools, with a sharp chain chainsaw little or no sawdust, chips only (that too large to fit through the eye of the shutter).

Some users prefer the traditional chainsaw safety glasses or goggles.To select depends on the environment. Sun visor in hot weather better ventilation for the hard work. Typically, both the goggles and goggles are used for superior protection.

In the EU, a visor must meet EN1731, or glasses must conform to EN166.

Chainsaw safety gloves
The operator's left hand a leather glove that is fitted to the front bar (but freely rotatable) chain saw.

Safety gloves to ensure that the bar If the recoil of the operator's hand holding the chainsaw. This means that the recoil is easier to control and the chain brake is engaged. Safety gloves also protect the operator's left hand in the same way as the chain saw safety gloves.

Ear defenders

Ear defenders and earplugs attenuate noise can cause hearing little or no damage levels.Non-electric chain saw is very loud, usually 115 db, 85 db above from the National Institute recommended exposure limit for occupational safety and health. 

In the EU, earmuffs must meet EN352-1.

Gloves
Chainsaw gloves. Note that only the left hand contains chainsaw protective fabrics, so only carry a chainsaw gloves label.

Chainsaw has cut gloves, tape protect such pants, but only in the back of his left hand. This is particularly important is that flexible work gloves, which limits how much they can be filled with. Experience has shown that the majority of chainsaw injuries to his left hand back occurs.

In the EU, chainsaw gloves have to satisfy EN381-7.

To be continued...


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History of chain saw Part Ⅱ

The first portable chainsaw development and Canadian mechanic James Suntech patented in 1918. He let his weight in 1930 after a lapse of the invention further by what has become the German company Festo in 1933 the company has become the development of production Festool portable power tools. In modern chainsaw other important contributors Joseph Buford Cox and Andreas STIHL; the latter patented and developed electric chain saw use in 1929 and in 1926 the contrarian website gasoline-powered saws and he founded a large number of companies producing them. In 1927, Emile linear interpolation, the founder DOLMAR, developed the world's first gasoline-powered saws and mass produce them.

German World War II interrupted the supply chain saws in North America, so that new manufacturers have emerged, including in 1947, he saw the vanguard forerunner Industrial Engineering Co., Ltd. (IEL). Limited and outboard companies in North America, the oldest part of the chainsaw manufacturer.

McCulloch chain saws to begin production in North America in the early 1948 models were heavy, the two devices have long. Chain saws are often so heavy that they had wheels like dragsaws. Other apparel line drive wheel from the power unit driving the cutting bar.

After World War II, in aluminum and engine design improvements to reduce the chainsaw to a point where people can carry them. In some areas skidder (saw) the crew has been replaced by the feller bunchers and harvesters.

Chainsaws have almost completely substituted forestry simple man power saw. They in many sizes, from for home and garden use, large "lumberjack" saw a small chainsaw. Military engineer training members of the unit, using a chainsaw because firefighters extinguish forest fires and fire ventilation structure.



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History of chain saw Part Ⅰ

The origin of the chain saw is debated, but the chainsaw-like tool, is carried out around 1830 by the German orthopedic surgeon Bernhard Heine. This instrument, osteotomes having to carry a chain link having an edge disposed at an angle smaller cutters; guide vanes chain sprocket is rotated around the handle movement. 

As the name suggests, it is used to cut the bone. Today saw the familiar prototype chain timber industry in the late 18th century by two Dr. Su Gelan John Aitken and James Jeffray initiative for symphysiotomy and resection were diseased bone. Chainsaw hands, which cut the concave side serrulate chain, around 1783-1785 the invention. It is the principle of delivery or puerperal Medicine (1785) description of Aitken and use him in his dissection room. Jeffray chain claims to have conceived the idea of ​​an independent looked around at that time, but it was 1790 before he was able to have it produced. In 1806, Jeffray published H. Morrow Park and PF joints caries removal embodiment MD comments by James Jeffray. In this communication, the park Morrow 1803 paper he translated and Morrow described the lesion resection joint success, especially in the knees and elbows. 

Jeffray explained that the chain saw will allow small wound to protect the adjacent neurovascular bundle. Although the concept of the hero, symphysiotomy, for most obstetricians are too many complications, but the idea Jeffray recognized, particularly the development of post-anesthetic. Mechanized version of the chain saw has been developed, but in the later 19th century, surgery to replace the unlucky twist wire saw. For many of the 19th century, however, the chain saw is a useful surgical instruments.

To be continued...



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Hammer use and maintenance (c)

Hammer is a tool intermittent work, work, temperature shock mechanism of this part will reach about 200 ℃. Clearly defined in the standard hammer, when the hammer for durability testing, using 30s work, provision 90s shutdown, in actual operation, can not be completely in accordance with the requirements of the standard, but must work intermittently, not long continuous use, so as not to hammer the internal temperature is too high, causing damage to the tool. Before using the hammer must carefully read the instructions, required manual operations, and regularly check the cable to avoid cable damage caused by an electric shock.
In the hammer repair or maintenance, it must refuel accordance with the requirements specified in the instructions (some hammer oil is applied by the manufacturer together with the tool that comes with). In addition, hammer work, the cylinder temperature is higher, so the temperature dropping point refueling higher, in general, when the temperature dropping point of oil abroad hammer hammer work at about 200 ℃, more dust. Some hammer with a suction device or dust, must be used when using the hammer of the device, thus reducing the dust into the machine, the other can also reduce operator inhalation. Since the vibration hammer work is large, conventionally mounted on the hammer switch is damaged more generally reflect quality problems. Now fitted with anti-vibration hammer switch has taken measures such as hammer plus some rubber cover to protect the surface of the switch. This will reduce vibration switch due to vibration caused by a hammer, but also to prevent the dust from the switch with the handle into the joint port, can also increase the insulation. When the switch contact is not good, it should be cleaned or replaced.
The brush is wearing parts, when worn to a certain extent or near the wear limit, the motor will fail, should be replaced. Use the brush is automatically stopped, the motor will automatically stop running, and you should put on the same brand of brush, the brush should be kept clean, so that the brush can slide freely within the brush holder. In addition to these problems, hammer in use, there will be many other problems that need to find out the cause of the problem and take appropriate methods to be addressed.



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Hammer use and maintenance (b)

Hammer crank linkage as follows.
Motor shaft l drive gear 2 gear 2 drive gear 3, gear 34 to secure the clutch connection with the bevel pinion shaft when the gear 3 rotates bevel pinion shaft 4 also rotates, and led a large bevel gear 5, cylinder 6 cylinder 6 and 7 of torque between the guide sleeve and serves as a guide with 8 balls to pass, when the cylinder 6 is rotated, due to the effect of balls 8, the guide sleeve is also rotated. Bushing passed between 7 and 9 with a roller drill torque and serves as a guide, when the motor starts rotating the drill bit 9 is also at the same time, 2 gear driven eccentric shaft l4, link l3, including plug l2, and reciprocating piston sports, due at a and B at the pores, so that the impact hammer l1 pressure difference generated at both ends, so that the impact of the fight against child l 01 so that the impact of the sub-combat drill, so that the rotation of the drill bit and the impact of the completion of the action, crushing drilling object.
Hammer relatively poor environment, lack of drill grinding wheel machine on site, some operators have not yet mastered mill construction workers drilling techniques often found playing bit blunt no sharpening phenomenon. This allows hammer work load increased, the drilling speed is reduced. When drilling rate decreases, the operator then increase the pressure on the hammer, so that not only can not increase drilling speed, but will also increase the motor load, the tool is overloaded. In fact, if a little pressure on it and help prison, so the pressure to increase when the hammer action will result in damage to the tool. Thus, the operator should pay particular attention to blunt drill must be timely sharpening. Hammer overload protection device is used to protect the operator safety and protection tools.
Hammer in use, if the drill bit suddenly stuck, then increase the torque load suddenly increases, overload protection device will slip, both to protect the operator, but also protect the tool. If there is no overload protection devices or overload protection device does not meet the requirements, the drill bit stuck in prison, suddenly increased torque, the operator will hand sprain, and motor stall, or even burn out the motor. There are currently hammer overload protection device using the friction clutch, like Suzhou East Granville, a German power tools Co., Ltd. developed clutch hammer is this structure, which Hammer has won state patents, are first-class quality and performance. Some use steel balls clutch, there is the use of jaw, as well as the use of electrical control, that is when the drill bit stuck, increase the current, the circuit automatically disconnect the motor will stop. When we use or maintenance, be sure to pay attention to whether the overload protection device failure during maintenance can not be arbitrary adjustments.

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Taizhou Bak Industry&Trading Co., Ltd.  Add.: Tianshi mansion, Luqiao district, Taizhou, Zhejiang, P.R. China  TEL:86-576-80256655 M.T&What'sAPP:0086-13626650852 Fax: 0086-57680256656  Skype: rjjnicole  Email: sales2@tzbak.com Web:www.BakParts.com; www.tzbak.com

 

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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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Taizhou Bak Industry&Trading Co., Ltd.  Add.: Tianshi mansion, Luqiao district, Taizhou, Zhejiang, P.R. China  TEL:86-576-80256655 M.T&What'sAPP:0086-13626650852 Fax: 0086-57680256656  Skype: rjjnicole  Email: sales2@tzbak.com Web:www.BakParts.com; www.tzbak.com

 

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