What blades are better for a gasoline trimmer
Metal toothed discs are circular in shape with the appropriate number of teeth at the base. These tines come in many kinds, shapes, and sizes. The more teeth, the better the tool can handle dense grass and even small trees. Cutter wheels for trimmers gain speed faster, which is their advantage. They also have a high moment of inertia, which is a disadvantage. This has a negative effect on the drive unit of the tool, because the starting power is increased and eventually the motor overheats during frequent stops. In addition, the tooling differs in the presence or absence of peoria.
- Perforated discs with larger numbers of teeth up to 40 teeth are effective at cutting dense, tall and small grass, scrubby grass and bushes. the more tines, the less is the grass shredded. Grass will not wind up on discs with many tines. discs with 60-80 tines are intended for cutting of the grass with small trees on the territory, the stem thickness of which does not exceed 7 cm
- Solid discs. discs that do not have holes in their construction. They have a lot of weight, so put them on lawnmowers with an engine capacity up to 30 cm3, strongly not recommended. The tool simply cannot pull a heavy cutting attachment. Compared to peorized, they weigh 1.5-2 times more. Cope with thick and sparse grass effectively. The smaller the number of blades, the more the grass is cut, thus increasing the load on the motor. The load on the gearbox also depends on the angle of sharpening of the teeth
If the operator has to mow dense grass and dead wood, it is recommended to choose discs with peoria and more teeth. The solid discs are suitable for mowing green grass of varying density, but they are used only on powerful petrolmowers with an engine capacity of more than 40 cm3.
This is interesting! Milling discs with pobedite tips allow you to mow grass near existing obstacles. For mowing grass in hay, steel discs with more teeth are recommended. Evenly sharpened teeth on these blades can effectively cut the grass. For cutting thick-stemmed plants (raspberry, ragweed) the solid discs with the number of blades 16, 24 and 32 are used, as well as peorized with any number of teeth.
Review of manufacturers
There are a huge number of manufacturers of brushcutter blades. The most popular among them are. The Bosch brand, for example, is known for its blades with two and three blades. The peculiarity of this company’s blades is that each of the blades can be replaced separately from the others.
Another company known for its paddle knives is Shark. The advantage of the design is that the blades are mounted in relation to each other at an angle of 120 degrees. As a result, it’s easy to adjust each of the blades, which is convenient for different vegetation. Another feature of knives from this manufacturer is the low weight.
6 teeth brush cutter head Blade blade blade trimmer
Husqvarna is also known for its knives with many teeth, especially the hay knives. Ideal for thick and dense grass. From the disadvantages it is worth noting the heavy weight of the discs and the fact that it is impossible to turn the knife, if one side of it is sharpened.
Inforce knives are good for cutting undergrowth and branches. in practice, the metal of which the cutting elements are made, proves to be very durable. The only thing is that in some models, the bit of white carbide wipes off very quickly.
The knives from Maruyama are often praised. They are characterised as very robust and long-lasting.
The discs handle grass of different kinds as well as shrubs and trees equally well.
Rezer blades are great for grass, weeds, and branches. The teeth are even able to cut down trees 6 cm or more in thickness. However, they have a disadvantage in the form of grass winding on the shaft.
Patriot makes quality knives. Users note that if properly selected for a particular job, the blade will last a long time and surprise with its performance. Blades from this manufacturer are very easy to sharpen on their own.
Where and what kind of blade is better?
When a fishing line is not enough, you should think about replacing it with a steel or plastic blade. If a replacement knife is included with the trimmer, there are no problems: the replacement of the cutting equipment is made in accordance with the instruction manual for the grass trimmer. But this is not always the case.
Find out the suitability of the installation blade on the existing electric trimmer for grass (with gasoline such problems will not be) can be on the actual number of revolutions of the flexible shaft. If at replacement of a bobbin with a line on a knife the engine gains the set number of revolutions for a second or less, replacement is possible, otherwise the engine will strongly overheat, and the gear of a trimmer for grass will quickly fail.
It’s interesting to compare the three most common blade designs. multi-toothed circular blades, two-blade blades and three-blade blades.
Metal circular knives
The trimmer usually comes with several of these blades, but you can buy them separately by measuring the outside diameter of the blade and the configuration of the seating hole. Disc knives from STIHL and Husquarna, for example, are interchangeable. Disc knives differ in the number of teeth, height (can be different heights), as well as the solidity of the blade. These knives are installed on STIHL, Huter, AL-KO trimmers with a straight boom and are characterized by the highest rigidity. Good for old growth and long stems, but young grass often has grass clippings sticking to the inner surface of the blade guard.
the grass trimmer with peorized blade, compared to the solid blade, picks up quicker. The disadvantage of circular blades is an increased moment of inertia, so the starting power of the drive increases. With low-cost designs and frequent work stoppages, this leads to overheating of the motor and adversely affects its service life.
Two-blade and three-blade blades
The Bosch brand of electric grass trimmers has such knives. Their moment of inertia is minimal and has almost no effect on the performance of the drive. The convenience of such design is that it is possible to change each of the blades separately. Such designs have a J-shaped curved boom. Double-blade knives work steadily on uniform mowed material. They throw the cuttings off to the side well and do not allow buildup or residue to collect on the boom shaft.
Three-blade and two-blade blades are quite competitive with circular blades, but the thickness of the blade should not be less than 2 mm. Thus forged knives are more durable than stamped (found on trimmers of Chinese manufacture). To distinguish them simply. on forged blades the traces of the cut-off punch with the presence of distinctive zones of shearing and chipping are clearly distinguishable, which is not the case with forged blades.
The “Shark” is a three-blade nozzle with each blade fixed to the other at an angle of 120°. The advantage of this design is that each blade can be set individually. As a result the quality of mowing in an area with different types of vegetation (grass, weeds, dead wood) is approximately the same. over, since the interval between each blade is shorter, the grass will be thrown more intensively. Head “Shark” is compatible with many sizes of electric trimmers, low self-weight, but requires periodic adjustment blades, which are attached to the base with conventional screws.
You can reduce the moment of inertia of a circular blade by bending its surface independently, for example, on a punching press. The holes in the blade must be perfectly symmetrical in relation to the center of gravity of the blade. The tool becomes lighter, but its cutting capacity does not change. A positive effect is also given by the correct sharpening of the blades of the replacement blade. Grinding at lower speed with medium grit grinding wheels. Teeth are ground at an angle of 30°. Do not use a grass trimmer blade with tungsten carbide tipped blade. cutting quality will remain almost unchanged, but the weight of the tool will increase.
There are a huge number of manufacturers of blades for brushcutters. It is worth familiarizing yourself with the most popular among them. For example, the Bosch brand is known for its blades with two and three blades. The peculiarity of the blades of this company is that each blade can be replaced separately from the others.
Another firm known for its paddle knives is “Shark”. The advantage of the design is that the blades are mounted relative to each other at an angle of 120 degrees. As a result, it is easy to adjust each of the blades, which is convenient for different vegetation. Another feature of the blades from this manufacturer is their low weight.
Husqvarna is also known for its knives with many teeth, especially the hay knives. Ideal for thick and dense grass. The disadvantages are the heavy weight of the blade and the fact that it is impossible to turn the blade if one side is sharpened.
Inforce knives are good for undergrowth and branches. In practice, the metal of which the cutting elements are made, shows itself as very durable. The only thing is that in some models the pobedite tips wear out very quickly.
The discs are equally good at working with grass of different kinds, as well as with bushes and trees.
Rezer discs are excellent for cutting grass, weeds, and branches. Teeth are strong enough to withstand even tree trimming of 6 cm or more. But they have a disadvantage in the form of grass winding on the shaft.
Patriot makes quality knives. Users note that if properly selected for a particular job, the drive will last a long time and surprise with its performance. knives from this manufacturer are very easy to sharpen by themselves.
The rating of the best is also a domestic manufacturer of lines for trimmers. Three basic cord series: star, ellipse and square. There is also a particularly strong heptagonal line for trimmers. Reels have a winding from 15 to 114 m.
- Low cost.
- Quality cutting of grass.
- The trimmer line is covered with heat-resistant material for protection against heat.
- Choice of colors.
- Low noise level during operation.
- It wears out and breaks down quickly.
- Not designed for stony areas.
Edger vs. String Trimmer. Which One is Better for Edging
Speaking about the manufacturers of garden equipment, it is impossible not to mention the Japanese company Echo. It is engaged in production of light agricultural equipment and fishing line. The company offers several lines of its products. It differs in color, shape and thickness.
- The products are not often available in the market, because they quickly go out of stock.
- Thick cross-section trimmer line is slower to unwind.
- Has a high price.
- Reels are available as small coils and in coils.
- Quality wire.
- Use of different models.
- Particularly rugged series designed for any vegetation, even thorny bushes.
- Series of different profiles, diameters and compositions differ in color.
- High value.
- Fragility of line increases with long storage time.
In Russia, the most popular lines are square and polygonal cross-section lines. They make the best smooth mowing of lawns.
Consumables for lawnmowers
In addition to fishing line, there are the so-called knives. Plastic knives are cheap, but quickly deteriorate, but the iron ones are more expensive, and perform their function better. They are stronger, they can mow dense grass, shoots of bushes. The most efficient knives. this 6-8 blades.
Of the disadvantages of iron knives can be noted the fact that they promptly blunt, especially if the work takes place on a concrete site). This is where the second disadvantage comes in: they need to be sharpened. Plastic blades are notable for their lightness and affordability.If you just need to trim the lawn or do something similar, then here, of course, it will be wise to apply an ordinary fishing line for a trimmer.
Types and uses of knives
Today, models are sold that vary in:
- The material of the blade. There are not only metal blades, but also plastic blades. Which of these to choose, everyone decides based on the device power. For example, it is important to remember that metal knives are heavier, so the grass trimmer shaft will pick up speed more slowly, and this affects the longevity of the engine itself. But unlike plastic knives, steel knives are more effective in coping with the tasks.
- The second difference is the cutting edges. Nowadays a variety of products are sold. So sold products with 4 teeth, which are located at the same height or at different. The holes can be solid or technological.
- The last difference is in the shape of the blade itself. So the product can be in the form of a disk with 40 teeth, which is a convenient solution in some cases, but also sell models in the form of several blades, as a rule 3-4.
The choice of dimensions and design of the blade depends on the type of mowed grass, also do not forget about the power and type of boom. As it affects the final result.
If a person has a grass trimmer, where the boom is shaped like the letter J, then it is not recommended to use steel knives, because if the product comes into contact with a stone or a similar hard substance, the product will be thrown aside by the user. All this will lead to the fact that a person may have a leg injury, with the wound can be very serious.
Do not forget that the inertia of peorized knives is several times lower than that of the standard versions. Of course, on the tool itself it is reflected minimally, especially if quality steel was used in its manufacture. But if you buy a cheap Chinese version, you should not count on good metal.
In some cases, plastic knives for the grass trimmer will suit a person. Yes, they are not durable and deteriorate quickly, but thanks to them the user will be able to cut most types of vegetation. Also, thanks to the elasticity of the product, no additional load on the engine is created.
Grass trimmer blade: when to use and what to choose?
Using a grass trimmer in dacha and homestead plots makes mowing the grass much easier and faster. However, it is important to choose the right “consumable” for the electric gasoline trimmer. Simply put, what exactly will you mow the grass: cord (a special trimmer line) or a knife. Both the line for the trimmer and the knife are equally suitable for mowing grass in hard-to-reach places, but in what cases the knife is more effective?
When it is better to use a trimmer blade for grass?
It is the line for the trimmer that is most often used, as it is safer to use and provides almost the same result when cutting the grass. But if you have to mow tall enough grass, you will certainly encounter the fact that long stems will wind up on the spool or spindle where the grass trimmer head is attached. To avoid this it is recommended to use the blade. cutter for grass trimmer.
A burr will also be more effective if you need to mow dry grass, bushes, burdocks, nettles, or brushwood. The only thing the blade might be afraid of is bumping into a rock.
The trimmer blade can be made of plastic or metal. Each grass trimmer model initially comes with (or is offered by the manufacturer) a different kind of blade. This is due to the shape of the grass trimmer bar and is made to maximize the safety of the user. Therefore, it is not necessary to take a metal blade if your model of grass trimmer implies the use of a plastic one. Even if you are assured of the versatility of the knife.
Grass trimmer blade may look like a special mowing (trimmer) head with plastic blades, or be an integral design, such as a disc knife with a different number of blades (as a rule, such models are made of metal).
trimmer for grass with a metal knife will help get rid of not only grass, but also thickets of bushes or young trees. You can also trim raspberries and currants with a trimmer.
Basic safety rules when using metal grass trimmer blades
A metal blade for grass trimmer is installed only on units with a straight boom. This is due to the design of the tool. When when mowing grass (bushes, thin trees) the disc bumps into an obstacle (usually a stone) it most often bounces back. to the side of the user. At trimmers with a straight boom, the distance from the head to the feet of the person is safe enough.
Also, such grass trimmers are held by the user with a T (U) or J-shaped handle, and if the handle is D (O)-shaped, then it comes with a special limiting bar, which rests against the leg and allows to get closer to the cutting tool.
If your blade gets bent on an obstacle, don’t rush to change it. You can level it yourself with a hammer. The flexibility of the blades is designed to reduce the load on the engine and transmission.
Experience of professionals and ordinary users showed that the shape of the blade is important only if you mow grass for preparation for winter, like for making hay for animals, because three- and four-blade knives chop the grass too much. But the quality and speed of mowing at different blades do not differ significantly.
The most popular model of blade for grass trimmer. round shape with eight teeth on the circumference. Also, a variation of it is often used: with four large teeth and small ones in between.
And for mowing shrubs (raspberries, currants) and thin young trees most often a regular blade in the form of a disk with many teeth is used. It can be installed on any grass trimmer, even with a small power, and effectively treat the area.
line for trimmer or blade for grass trimmer What’s better
Handheld grass trimmers mow vegetation using fishing line or knives. In the first case, the functionality of the grass trimmer is limited to mowing soft grass with medium to low height, as plant debris winds up on the flexible shaft or sticks to the spool. With the installation of a grass trimmer blade, tougher stems can be cut and young bushes can be cut.
Types and uses of grass trimmer blades
Classification can be made on the following grounds:
- According to the material of the knife: metal and plastic knives are known. The choice is often limited not so much by the desire of the user as by the power of the drive. metal knives are heavier, and the grass trimmer shaft works slower to gain speed, which negatively affects the longevity of the engine. At the same time, the cutting capacity and durability of steel blades is much higher than that of plastic blades.
- When making the cutting edges. They vary considerably and can be with four or more teeth, single or multiple, and solid or with technological holes.
- According to the shape of the blade itself, which can have a continuous disc, and can be made in the form of several blades with the same distance between them.
Grass trimmer blade size and design are chosen based on task, stem type and motor power.
If the stem of the grass trimmer is curved in a J shape, then a steel blade is undesirable, because when it comes in contact with a massive obstacle, such as a rock, the grass trimmer will be sharply tilted back toward the mower.
Then even a strict limiting body will not save the affected person from work. On trimmers with a straight bar, the rebound distance will increase.
Plastic blades for grass trimmer, although less durable, are quite capable of cutting most types of grass. In addition, their increased elasticity does not put additional strain on the flexible shafts of electric trimmers.
The configuration of the cutting edges determines the quality of the cut. Hard grasses, dead wood, tough shoots, disc knives with the maximum number of teeth are preferred: then, regardless of the speed of the flexible shaft, the cut will be clean and straight.
The inertia of peorized knives is much less than that of hard knives and this is not particularly reflected in tool life because the tool is made of high quality tool steel.
Cheap Chinese products are an exception: knives can be made of any steel.
Where and which knife is best?
When the capabilities of a fishing line are not enough, you should consider replacing it with a steel or plastic blade. If the replacement knife is included in the grass trimmer, there is no problem: the cutting tool is replaced in accordance with the instructions for use of the grass trimmer. But that’s not always the case.
To clarify the suitability of installing a blade on an existing electric trimmer (no such problems with gasoline), according to the actual number of revolutions of the flexible shaft. If the line-to-blade reel is gaining a given number of revolutions per second or less, replacement is possible, otherwise the motor will overheat excessively, and will fail.
It is interesting to compare the three most common blade options: the disc with multiple teeth, as well as two and three blades.
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Metal circular blades
Typically, several such blades are included in the grass trimmer, but you can also buy them separately, measuring the outside diameter of the blade and the configuration of the hole. For example, disc blades from STIHL and Husquarna are interchangeable.
Disc blades vary in the number of teeth, height (they can be multiple), and blade continuity. Such knives are most often installed on trimmers from STIHL, Huter, AL-KO, equipped with a straight shaft and the most rigid.
They handle old shoots and long stems well, but when working with young grass it is often observed that the scraped crop sticks to the inner surface of the blade guard.
Grass trimmer with a peorized blade has faster speeds than a solid blade. Lack of circular blades. is increased moment of inertia, so the starting power of the drive increases. On cheap designs and with frequent stoppages in operation, this leads to overheating of the motor and negatively affects its longevity.
Two-blade and three-blade knives
Such blades are complemented by their Bosch brand electric trimmers. Their moment of inertia is minimal and has almost no effect on drive performance.
The convenience of this design is that each of the blades can be replaced separately. In these trimmers, the rod is bent in the shape of the letter J. Double-blade blades run steadily on uniform slanted mass.
They throw the cut well to the side, and do not allow any residue to stick or wrap around the shaft of the rod.
Three-blade and two-blade knives are quite competitive in their capabilities, but the blade thickness should not be less than 2 mm.
At the same time, forged blades are more durable than stamped ones (found on Chinese trimmers). Distinguish them simply.
Stamped blades have clearly visible cutting die marks with characteristic cleavage and shear zones that are not faked.
“Shark.”. is a nozzle consisting of three bladed blades, with each blade fixed at an angle of 120° in relation to the other. The advantage of this design is that each blade can be adjusted individually.
As a result, when mowing an area with different types of vegetation (grass, weeds, dead wood) the quality of mowing will be approximately the same. Also, because the space between the grass cut by each blade is smaller, the grass will be thrown more intensely.
Two-blade and three-blade knives
In addition to the circular blade, the grass trimmer is also available with two-blade and three-blade blades. Their thickness rarely exceeds two millimeters, and they can be stamped or forged.
Forged knives on the grass trimmer are much more durable than stamped knives, and this is very important to consider when choosing.
If necessary, the blade for the grass trimmer can also be made by your own hands. It is made from a piece of pipe and stainless steel, 1-1.2 mm thick. Stainless steel is used to make the knife blades.
The schematic diagram of the blade on the grass trimmer is shown below:
- First, from a piece of pipe of a suitable diameter, a transition sleeve is cut on the shaft of the grass trimmer;
- Then a washer is welded to the sleeve that is slightly larger in diameter than the sleeve and protrudes over its edges;
- The knife blades are riveted to the washer (2 or 3 pieces).
Despite all the apparent simplicity, it is important to observe a number of important conditions when making a blade for the grass trimmer. Be sure to have a small backlash for the blades, as well as the minimum clearances that will not allow them to mash with thermal expansion.
If you have no skills with tools and welding, it is best to look for ready-made versions of knives for trimmers grass.