Criteria for choosing discs for trimmers for grass and instructions for replacing them

Trammers’ grass ugos occurs due to the use of a mowing head with a fishing line and metal disks. Each type of cutting device has its own fundamental features. The use of the fishing line is limited to the type of vegetation, therefore, where the head with the cord does not cope with the task, a metal disk is used. How to choose a cutting disk for a trimmer for grass, what they are, and how they are hidden, we find out the details before buying an appropriate equipment.

Initially, we note that metal discs can be used not only on gasoline, but also electric trimmers. The main condition for the use of metal cutting knives on the equipment. In the design of the tool, the transmission mechanism (shaft or gearbox) should be a rigid type. A hard.Type gearbox is a metal shaft transmitting a torque from an electric or gasoline engine to a working organ.

There are models of trimmers with flexible shafts, the design of gearboxes in which is represented by a steel cable. These are, as a rule, low.Power electrical grass drivers that are not intended for large loads, as well as household lawn mowers. You can’t use metal disks on trimmers with a flexible shaft (only plastic), as this will lead to a rapid failure of the gearbox. Before buying metal cutting mills, you will need to find out the type of gear ratio of your tool. Hard or flexible.

What type of gear ratio is used on the trimmer is indicated in the technical description to the tool. If a trimmer for grass has a curved bar, then a flexible shaft is used in its design. Tools with direct bar can be equipped with rigid and flexible gearboxes, which depends on the power of the trimmer for the grass.

Trimmer knives are classified according to the following signs:

  • Manufacturing material. They are plastic and metal. Plastic knives are less effective than metal, but they do not have a large load on the shaft and the drive mechanism of the tool. Plastic discs are used on electric trimmers and household benzos
  • The design of cutting devices. Steel discs are of two types. Blade and toothed (milling). Plastic knives are produced in the form of blades. Tough devices have a similar design with circular discs, and lobed have large flat knives
  • The number of cutting edges. The number of teeth and knives on the disks differs, which affects the performance of cutting equipment. On gear discs, the amount reaches 80 links, and on blade. From one to four pieces
  • The presence of additional spraying. Steel gears are additionally equipped with winning attacks, which allows you to use a tool for driving grass on mound surfaces. When the disk is contacted with obstacles in the form of earth and stones, the teeth are not deformed and do not dull, which is achieved due to the presence of winning attacks. Experts say that devices with carbide attacks do not serve for long. Attacks wear out quickly, and then the milling cutter is used without winning

Plastic knives for trimmers not only cost cheaper than metal ones, but also do not have high loads on the engine and transmission mechanism. This is especially true when the knife stumbles upon obstacles. The higher the elasticity of the cutting knife, the less likely the deformation of the plastic disks.

It is interesting! Rosted wheels with a large number of links are used to prick different grass. Dry, green lawn and thick.Nisted. The cut with such a disk is straight, clean and even. In addition, a large number of teeth excludes their rapid dullness, and the presence of additional holes on the surface of the circle (penetration) is intended not only for cooling, but also to reduce weight and increase inertia.

Review of manufacturers

Motokos disks manufacturers are a huge number. It is worth familiarizing yourself with the most popular among them. For example, the Bosch brand is known for its knives with two and three blades. The peculiarity of the knives of this company is that each of the blades can be replaced separately from the others.

Another company, known for its lobed knives, is a “shark”. The advantage of the design is that the blades are fixed relative to each other at an angle of 120 degrees. As a result, it is easy to configure each of the blades, which is convenient for different vegetation. Another feature of the knives from this manufacturer is small weight.

Husqvarna is also known for its knives with many teeth, especially hay knives. Ideal for thick and dense grass. Of the minuses, it is worth noting the large weight of the disks and the fact that you can not turn the knife if one side is imprisoned.

Inforce knives cope well with undergrowth and branches. In practice, the metal from which the cutting elements are made shows itself as a very strong. The only thing in some models of winning attacks are erased very quickly.

Positive reviews often receive knives from Maruama. They are characterized as very strong and durable.

Discs do equally well as grass of different types, so with shrubs and trees.

Rezer discs perfectly mow grass, weeds, branches. The teeth can withstand even drilling trees with a thickness of 6 or more centimeters. However, they have a lack of winding grass on the shaft.

Patriot company produces high.Quality knives. Users note that if you choose the right disk for a certain job, then it will serve for a long time and surprise with its performance. It is very easy to drag knives from this manufacturer on your own.

How to choose?

When choosing a knife for a mower, you should pay attention to many points. For example, wheels with metal teeth are most often made in the form of a circle. Teeth can differ in shape, species, size. For small trees, as well as thick grass, it is better to give preference to discs with a large number of teeth.

It is worth noting such an advantage of milling circles for motorcycle, such as a quick set of revolutions. However, the high moment of inertia does not affect the drive device of the unit in the best way. For dense mowing, for high, as well as for small rough grass and shrubs, it is better to choose circles with 40 or more teeth and peoration. They are able not to grind vegetation, and at the same time it will practically not be wrapped in a circle. If the number of teeth is more than 60, then you can safely mow grass and trees with a barrel thickness up to 7 cm.

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Disks with a solid canvas and without holes are distinguished by a large mass, so they should be chosen for powerful trimmers (more than 40 cm3). At the same time, it is convenient for them to mow rare grass, dry, they are also suitable for mowing with different densities.

Winter attacks should be chosen for mowing plants next to obstacles. If you need to mow grass on hay, then you should give preference to steel knives with a large number of teeth with even sharpening. Continuous discs with the number of teeth from 16 to 32 cut plants well with thick stems.

For low.Power trimmers, lobed discs with a minimum moment of inertia are better suited. The smaller the blades, the stronger the tool will grind the grass. So, discs with two blades are most often used to mow homogeneous grass. The main advantage of this species is that it discards cut plants to the side.

When harvesting hay, it is recommended to choose knives with four blades so that the grass does not grind.

The thickness of the blades is also important when choosing. Discs can be stamped or forged. The former are characterized by a low price, but at the same time can be badly damaged, faced with an obstacle. As for the forged discs, chips and slices do not form on them in a collision with solid objects.

For electric trimmers, only plastic knives should be selected. Their low weight will not create an excessive load on the engine. Soft plastic allows the knives when they are on the obstacle do not break, but simply bend slightly or deform. It is recommended to use such cutting elements for beating thick soft grass.

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What manufacturers deserve trust?

We have chosen the five best for our opinion of manufacturers whose products we used ourselves and which users recommend:

  • Bosch. One of the best producers of lobed discs for trimmers. In principle, loppy disks are more common among products, and not toothe. Perhaps this is due to the fact that the vast majority of mowing equipment has small power. Some models have the opportunity to change only one scenes without replacing the whole disk.
  • Husqvarna. Here are all kinds of disks for thick grass and shrubs, for the spinning and hay. Quality of the discs at a height. True, the price bites a little.
  • Stihl. Here in huge numbers both lobed knives and gear. Disks are made of high.Quality steel, for a long time they will not dull even in contact with the ground or solid objects. Cost about the same as Husqvarna.
  • Rezer. The company produces many discs for spinning shoots and shrubs up to 60 mm thick. But it is better to take gear from 40 teeth or more from the discs of this brand, otherwise grass will be wrapped on the nozzle.
  • Champion. There are good discs for a moderate price. If there is no way (or desire) to pay more, but I want a normal disk that will not die from the first stone, nozzles from Champion. A great option.

And what disks for motorcycle do you use? Share your experience in the Комментарии и мнения владельцев?

As mentioned above, gasoline models have a higher mowing power, therefore it is preferable for them to use steel or heavy plastic discs. For other samples, light lobe knives or light plastic knives are often used for other samples. Such cutting devices will not greatly burden a low.Power electric or battery apparatus.

discs, trimmer, grass, description

However, the use of one or another type of knives will not always depend on the power of the equipment. The transmission mechanism, which can be either tough or flexible in this case, will play a non.Last role in this case. In the devices in which a rigid mechanism is installed, rotation is carried out by means of a shaft, and in models with a flexible mechanism. This process passes through a steel cable. Thus, if you install a heavy steel disk in an apparatus with a flexible cable, then extreme loads will occur on it, and the whole structure will quickly become unusable. Therefore, only plastic discs or a fishing line for a trimmer are installed in a motorcycle. To find out the type of transmission, just look into the instructions. However, it can also be determined “by eye”. If the trimmer for the grass has a curved bar, then a flexible gear is 100% used in it.

IMPORTANT! With the type of transmission, it is imperative to determine the direct purchase of a knife!

Disk manufacturing material

In steel disks, either alloyed instrumental steel or its carbon instrumental look is often used. He can still have attacks from the winnings on the blades and teeth. Steel knives are often installed on professional equipment that can roll out any grass, young growth, and even small trees with a barrel of not more than 70 mm. Plastic knives are suitable for household samples, they can mow low weeds, but better suited for a regular lace haircut.

IMPORTANT! It is worth remembering that for a young shoot, plastic incisors are not suitable!

Knife design

Lobed-they have 2-4 blades, but sometimes there may be more. They are easier in weight than toothed ones, have a smaller inertial moment and very little load the engine, coupled with the mechanism of transmission of the apparatus. For them, there are specific areas of use:

It is extremely desirable to work with lobed discs only on the same soft grass, because the grass with mowing flies away from the knife. When using three.Lobed models, a trimmer for grass will grind the grass already smallerly, respectively, this option can work on high grass. The four.Lobed option will already cope with a small hayfield.

Long knives are more often found in dachas and small personal plots. The best choice for such purposes can be called an electric trimmer for grass with a plastic or small steel knife.

Tough. They will find their application if it is necessary to often mow young shoots and small trees. The teeth on the disk are located in the form of small pointed protrusions. Their number may be from 20 to 80 pieces. It shows that the more teeth on the disk, the more complex operation it is able to perform (for example, the more teeth, the easier it is to cut the tree).

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Self.Manufacture of a knife

The easiest way is to sow a disk for a trimmer for grass in its blasphemous performance. For this you will need:

  • Part of the pipe (preferably copper than steel) with a suitable diameter. A transitional sleeve for the output part of the flexible shaft will be made from it.
  • A steel sheet with a thickness of no more than a millimeter (for making a washer).
  • Standard Schplint (GOST 297-66) (Founding of the base in the shaft).
  • Stainless steel stripes (thickness from 1 to 1.2 mm) (knife blades themselves).
  • Fasten element (it is preferable to use rivets than nuts/screws, despite the fact that even if they go as spare parts complete with the device).
  • To begin with, it is necessary to mark the total dimensions of the device so that they do not go outside the protective casing when cutting. Then you can start making a bushing bushing.
  • For the purpose of improved planting, the sleeve is made split and seated along the outer surface of the trimmer shaft. Due to the fact that the diameter of the washer can only be determined by the size of the available space, it is also possible to choose the puck from the most close sizes as close as possible.
  • The puck needs to be welded to the sleeve so that the formed catfet on the seam would take a minimum of space.
  • The manufacture of blades is best done on the milling machine, paying particular attention to the accounting of sharp edges and corners. They should not bend excessively when they are subsequent sharpening.
  • Stamping mounts with a small backlash vertically will make it possible to cut a cut, especially from dry.
  • In order to prevent wiping the blades in case of their possible expansion from heat, you need to carefully check the presence of gaps (at least 1.5 millimeters) between the blades and the pipe.
  • The last step will be reliable fastening of the entire structure on the shaft with a chloride.

Disk material

Steel discs are made of carbon instrumental and alloy instrumental steel, with winning attacks on teeth and blades. Steel discs are installed on powerful professional equipment. They can download any grass, shoots, trees with a diameter up to 70 mm.

discs, trimmer, grass, description

Plastic knives are used only for low.Power models. They mow low weed grass or trim the lawns. Plastic is not suitable for the shoot.

Section. What the shape of the fishing line affects

The shape of the thread also affects the result of the mowing. Like the diameter, it directly depends on the fact that you will mow. The cutting edge is in the section:

  • Round. The most common. It mows well and dry grass, and fresh. One of its advantages is a low noise, but users say that this characteristic is not important, since the growling gasoline engine drowns out all other sounds.
  • Polygonal. The section can be triangular, square and even hexagonal. The pluses of the polygon. Sharp cutting faces. They better interrupt rude stems, even young shrub shoots. Hence the highest performance. Minus. Spent too fast.
  • Figured. The cross.Section is intricate, ribbed. It looks like an asterisk or a twisted square with recesses, in general. A complex geometric figure. This is a specialized cord. Each is attached to the instructions that it is he who cuts. For example, asterisk. Perfectly cuts lawn grass. Although it costs a little more expensive, it cuts carefully, the ends of the grass cover look attractive and do not dry.

How to insert a fishing line for a trimmer into a trimmer for grass?

There are 2 common ways to wind the cutting cord on the coil of a trimmer for grass, which depend on the type of mowing head. To choose a suitable method, you need to study the design features of the spool. This will help to understand how faster and easier to insert the cutting cord into a trimmer coil.

How to wind a fishing line for a trimmer to a coil of a trimmer for grass is the first way

In heads of the first type, the dividing line between the upper and lower compartment has a deepening and does not close in the ring.

A fishing line for a trimmer for such coils is wound in the following order:

  • First you need to cut off a 6-meter piece of cord from a common round. The resulting segment must be bent twice. As a result, one side of the fishing line should be 15 cm longer than the second;
  • Further, the cord, in the place of its bend, will need to be inserted into the recess provided on the verge between the upper and lower compartment of the coil. As a result, one part of the cord should be in the upper, and the second. In the lower compartment of the head;
  • Then you need to start the winding of the cord on the trimmer for the grass. This must be done exclusively in the direction shows the arrow on the coil. In this case, the cutting cord should not intertwine, and its lower and upper parts should be wrapped in the corresponding compartments. After that, 15 cm of a free cord should remain in each compartment;
  • In the upper compartment of the coil, there are recesses that are designed to fix the fishing line. The ends of the cord must be inserted into these recesses. As a result, they must be located opposite each other;
  • After that, the operator must assemble the spitter head and install it on a trimmer for the grass.

Before starting operation, the operator must stretch the free ends of the cutting cord so that they stretch. Thanks to this, when mowing grass, the fishing line for the trimmer will be evenly supplied from the spool without detaining the operator.

How to refuel a fishing line for a trimmer in a coil of a trimmer for grass. The second method

The coils of the second type are dividing line. Solid. On both sides are through the endless recesses, which are designed to wind a new fishing line.

To install the cord on such a head, the operator must act in the following order;

  • A previously prepared 6-meter piece of the cord must be bent exactly in half and cut. After that, the operator should get 2 identical pieces of fishing line;
  • Then at the end of each of the pieces you will need to make a small hook;
  • Next, the hook of one of the line for the trimmer for the grass will need to be inserted into the hole located in the upper head;
  • After that, you can start the winding of the cord. This is done strictly in the order indicates the arrow on the spray. The cord used should be evenly wrapped in the upper part of the coil. As a result, approximately 15 cm cord should remain free;
  • The remaining end of the fishing line will need to be fixed in the seizure of the upper part of the spool;
  • In the same way, you need to wind the second piece of the cord on the lower part of the mowing head of the trimmer for the grass.
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This method is suitable for all types of cords, including a home.Made fishing line from a plastic bottle.


Trammers for grass, electric cos and motorcycles consist of a rod. An elongated part, at one end of which there is a benzo or electric motor, and at the working end. A rotating cutting work head with a fishing line or a knife.

There are two types of trimmer heads (coils):

According to the principle of winding long pieces of fishing line, trimmer heads are three types:

  • Collapsible. To wind the fishing line, you need to remove the central part of the head and wind the fishing line for the trimmer
  • Non.Devastated. To wrap the fishing line, you need to pass a fishing line for a trimmer through the head and scroll a special handle
  • With a replaceable cassette. A fishing line for a trimmer wound and fastened with a factory way is put into the head
  • 2.3.4 or 8 petal knives (plastic or metal)
  • Steel mowing discs for hay harvesting (similar to disc saws, but do not have a wrestling of teeth) [2]

What are the wheels and what are their main differences?

We have already talked about how to choose the right discs and what main points must be taken into account at the same time. Today we decided to delve a little into the topic of disk types and find out how they differ and what consumer characteristics have.

By the type of manufacture, car discs are divided into stamped, cast, forged and prefabricated. The first two species are the greatest popularity and they can most often be found in car shops. Forged discs are the choice of enthusiasts, but the last species is the choice of those who love exotic, but today we will find a few words for them.

Such discs are the most budget option and differ in a simple manufacturing process. It is based on rolling carbon steel, which by stamping of a separate rim of the front part, and then under the influence of welding, turns into a finished disk. After manufacturing, such discs are painted with ordinary enamel, which protects them from the influence of the external environment.

The main task of this type of disc is to be cheap and they cope with it very well. Such discs can be seen on the basic trim levels of cars, but those car owners choose them, for which in the first place is not aesthetic component, but functionality.

Against the background of cheapness, two more basic advantages are manifested. Softness and good maintainability. These two points are interconnected. Thanks to simple production technology, such discs retain the plasticity of the metal. With a strong blow, such discs take on all the energy of the blow and simply bend, but then they can be easily repaired. Another advantage of such discs. Damping of the blow that comes to the suspension. This means that the disc slightly softens the blow and in some cases saves the suspension and retains it in its own integrity.

Unfortunately, there were also no disadvantages. This includes the softness of the discs, which in some situations, on the contrary, helps out. The weight of the stamped disk exceeds the weigh by 15-30%. This is much more important than it may seem at first glance, because a large mass leads to a deterioration in the dynamics, and also affects the increased fuel consumption.

The appearance of such discs is almost always the same, but recently there are options where there is a small hint of your own design. For those who want to combine a “stamp” with a design, the best option would be to use decorative caps. This is also relevant from the side that such discs very quickly lose their presentation. Due to the fact that the paint is damaged, the disk begins to rust, and the external environment only helps to develop this negative effect.

It becomes clear from the name that such discs are made by casting in a pre.Prepared matrix. Such discs are habitually called still alloyed, and this is quite justified, because, unlike stamped discs that are made of steel, lighter alloys are used for cast discs. Inexpensive cast discs are made of aluminum, and for more expensive ones, titanium and magnesium are used. After manufacturing, such discs can be polished, varnished or stained.

The main advantages of cast discs are small weight, good strength, resistance from corrosion processes, as well as a unique and diverse design.

As for the shortcomings, here is low plasticity, which leads to fragility. A cast disc, at least withstands a stronger blow than stamped, but if it will be greater than the permissible limit, then the disk will not only bent, but also split. In addition, the strength of the cast disk suggests that the blow will fully come to the car suspension.

As promised, a few words about forged and prefabricated discs. The first option is made of light aluminum alloys, which is based on magnesium, titanium. Initially, stamping is underway, and then machining. The main advantages of forged discs include very light weight and good strength, which is complemented by a stylish design. In addition, it is worth noting the excellent plasticity here.

With a strong blow, such a disk does not crack, but bends, which makes it easy to repair it. By and large, this is an analogue of stamped discs, but only a few dozen times better and more beautiful, but, as a rule, much more expensive.

Prefabricated discs are very rare. The main feature of this type is that such discs consist of several parts. Conventionally, they can be divided into rim and the front part, which is attached to the rim with the help of bolts. The main advantage is that you can combine materials in the disk, that is, one part of it will be made from one material, and the second by analogy from the other. It also allows you to easily replace the desired part of the disk if necessary. Such discs are most often used as an image element, made to order and are quite expensive.

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