How to attach a disc to a brushcutter

How to install a saw blade on a grass trimmer

If the beard is still in its maturation stage in thoughts or on the face, one wonders whether the grass trimmer is so necessary.

Often electric shaver models have a built-in trimmer for grass. But it can only be used for small tasks: trimming moustaches, tanks or the edge of the trimmer. Serious beard care will not work because the blade is too small and extremely uncomfortable for such a procedure.

The fundamental difference between these tools in function. Electric shaver is designed for a smooth shave under zero, the blades cut hairs at the very skin. The grass trimmer is designed to shorten hair without making close contact with the skin. It is impossible to hurt yourself with it, as there is always a minimum length of hair left.

It’s much more convenient when your grass trimmer has a mesh shaver function. They don’t need to be used for larger areas, as with a full shave. It will perfectly work out the details, where a clean shave is needed for contrast. Such a versatile device is available, for example, in the Philips line: the grass trimmer for beards and bristles shaver with double mesh.

By changing grass trimmer attachments, it’s easy to groom your face and body

Sometimes make do with a hair clipper. At first glance, there’s not much difference. Lovers of weekly bristles quite enough to pass her on her vegetation. Other types of beards require a grass trimmer for a number of reasons:

The main difference between these devices is the pitch of the teeth. The 0.4-1.0 mm trimmer allows for very precise cuts. The machine has a 3 to 4 mm pitch. The grass trimmer is smaller and lighter

Considering that most bearders are reverent about taking care of their beauty personally, it is important to have a comfortable position in your hand. Your hands are less strained, making it easy to perform precise movements for neat results

The grass trimmer is more cumbersome, about twice as heavy, it is difficult to maneuver with thin work. grass trimmers are often wireless, they hold power longer than machines. They are often used in wet bathrooms, where machine access is undesirable. The grass trimmer has many more functions. With it you can cut hair on the head, remove hair in the nose and ears, on the body and in the intimate area. For this purpose, special combs are simply installed. All fine forms, patterns, lines are trimmed with a trimmer. The vibration level of grass trimmers is lower, and they make much less noise when working.

Instruction on replacing the disc on a chain saw with a step-by-step description

Once you understand the construction of the cutting blades, all that remains is to figure out how to replace and install them on the tool. If the chainsaw is equipped with a line head and a metal disc is to be installed, then no remodeling of the structure will be necessary.

To install a metal disc on the grass trimmer, the following instructions must be followed:

  • First remove the plastic protective cover. not necessary. Disassembly procedure may vary depending on tool model. If the trimmer is equipped with a metal cover, there is no need to remove it. Plastic cover is removed in order to install metal cover
  • Use a special Allen key or screwdriver to lock the gearbox. The hole for locking the shaft can be on the side or on the end side
  • Twist the mowing head or bobbin from the tool if installed
  • A disc is inserted in place of the head or bobbin. The inner diameter of the disk should be located in a special groove. Install the mowing head so that the front side (with the letters) faces upwards
  • After installing the disk, put the locking washer of appropriate size. Then the fastening nut is screwed in, having previously blocked the gearbox shaft. The direction of rotation for tightening the fastening nut is counterclockwise
  • When the work is finished, it’s necessary to install the protective metal cover. If it is not available, the plastic cover should be left on

As you can see, the disc replacement procedure on the trimmer is not difficult at all, and takes no more than 5 minutes. The video below shows the correct way to change mowing heads and mowing discs on petrol mowers.

What types of lines are available?

The most common line type that fits on almost all types of reels is the round section cord. It is an ordinary line for a trimmer, suitable for cutting lush grass, but it will be much more difficult to cut dead grass with it, and it certainly will not cope with bushes.

As a rule, the diameter with which you can mow young grass does not exceed 1.6 mm. The thicker the thread, the coarser the grass it can traverse.

attach, disc, brushcutter

There are lines with sharp edges in the form of a star or square, such a version is more adapted to mowing dry grass just due to the available sharp edges, but the disadvantage is greater wear and tear and its strength is inferior to the circular cord.

There are lines with improved aerodynamics with characteristic indentations, scales and notches, such a product makes less noise, but it is used only on benzocows, since the output of such a thread from the spool is difficult, it is used most often with discs, in which the segments are inserted. The disadvantage of this product is its fragility.

Most often used in gasoline trimmers with an engine more than 1.5 liters.с. cords with a metal cord inside are used. This thread is ideal for mowing dry grass and small bushes. the presence of a core, has a positive effect on the wear resistance of this material. The disadvantage of such a cord is its price, which is significantly higher than the above listed opponents.

It takes about 10-15 minutes to wind the line for the trimmer. What is a grass trimmer reel?? Plastic body with a cassette inside, which has a special hook for easy winding of fishing line. Almost all trimmer reels have a similar fastening principle, this is the central screw-button, when you press it, it is possible to pull out the line for the trimmer of the required length. A few examples of different trimmer spools are shown in the photo below.

Reels of trimmers, the motor of which is located near the ground, have a different attachment to the axis of rotation, they have two buttons on the reel, located on the sides, which must be pressed, otherwise, the change of thread is no different from other cassettes.

The principle of the correct winding of the fishing line is similar in all the above cases, so for example, let’s consider a standard version with two tendrils.

To remove the spool of fishing line it is necessary to unscrew the screw, located in the center, but note that the thread is left, so you have to turn it clockwise, this is done on purpose, so that during operation it will not open under the influence of centrifugal force.

Next, using a screwdriver, disassemble the head and take out the spool, on which the line for the trimmer is wound directly. This design can be installed as a change in the trimmer to the disc. Measuring the required length and folding it in half, you need to tuck the line for the trimmer into the spool, bringing, as a result, its ends opposite each other (for this purpose there are special slots for fixing).

After that it is necessary to assemble the head in the reverse order, passing the ends of the cord through the two appropriate holes.

If there are any doubts or it is not quite clear how to charge a line for a trimmer on a grass trimmer we recommend to see how to wind up a line for a trimmer in a lawnmower correctly. In this video, the instructor will uncoil the trimmer head in detail step by step, measure the necessary amount of fishing line, usually two to four meters, and demonstrate the assembly and installation on the trimmer for grass.

What blades should I put on my lawn mower and electric mower?

Before you buy and put on a brushcutter blade find out what they are and in what cases are used. Today, manufacturers offer the consumer a large number of types of these consumables. In general, the entire cutting tool, designed for mowing the grass, can be classified:

The basic material for trimmer blades can be plastic or metal. The use of such consumables depends to a large extent on two parameters:

For safety reasons, manufacturers do not recommend putting steel knives on electric grass trimmers. Almost all cordless and cordless brushcutters with electric current are equipped with plastic blades. Depending on the manufacturer, they can be solid disc-shaped construction, with several blades, or in the form of a special mowing head providing for installation of removable plastic blades.

straight bar of gasoline grass trimmer and curved bar of electric trimmer

attach, disc, brushcutter

Putting a metal blade on an electric grass trimmer does not allow its design features.

  • The curved boom of the machine reduces the distance between the working part of the machine and the mower’s legs. In the event of a collision between the blades and a rock or other hard object, the grass trimmer swings back to its feet.
  • High torque, which we mentioned above, in case the metal blade collides with a solid object, transmits a large load to the flexible shaft of the grass trimmer and its motor. Which causes their premature failure.
  • Electric grass trimmers handle most often does not have a limiting strip that acts as a stopper. Which doesn’t rule out foot injuries.

Exactly these features allow to use only plastic blades on electric trimmers. in case of a collision with an obstacle the blades break, thus protecting the mower’s legs from possible injury.

Plastic blades handle overgrown and dry grass well. They can mow nettles and burdock stems.

Metal blades are used only on gasoline-powered trimmers because of their design features.

  • The straight boom design increases the distance to the legs, which gives the mower complete safety.
  • Handy U-shaped and J-shaped handles let you hold the tool firmly. D-handles of the brushcutter are equipped with a limiter that rests against the mower’s leg to prevent the head from coming close to the legs when the cutting blade encounters a hard obstacle.
  • Gasoline engine clutch for smooth speeds up to optimum performance. And when the blade hits a hard surface, it can absorb some of the impact.

This makes petrol grass trimmers with a metal blade the best choice for larger areas. They will successfully cope not only with high rough grass, weeds, burdocks and nettles, but also bushes and young trees.

The shape of the blade on the disc trimmer for grass does not affect the quality of work performed. The speed does not depend on them either. Triangular, trapezoidal, rectangular shapes are all a marketing move by manufacturers.

If you plan to make hay, it is better to use a brushcutter with more blades. Look for blades with eight teeth or blades with four big ones and four extra ones. Two- and three-blade blades will shred grass severely.

How to choose?

When choosing a mower blade, there are many things to consider. For example, discs with metal teeth are often circular in shape. Teeth can vary in shape, appearance, size. For smaller trees or dense grass, discs with more teeth are better.

It is worth noting the advantage of milling wheels for brushcutters, as fast speed. Nevertheless, the high moment of inertia does not have the best effect on the drive unit. For thick mowing, for tall and small rough grass and bushes it is better to choose blades with 40 or more teeth and peoria. They are not capable of destroying vegetation, and it will not practically wrap around the wheel. If the number of teeth exceeds 60, you can safely mow grass and trees with a trunk thickness of 7 cm.

READ How to Lubricate Grass Trimmer Upper Gear

Discs with a hard blade and without holes have a high weight, so they should be chosen for powerful trimmers (more than 40 cm3). They are also convenient for mowing sparse grass and dry growth; they are also suitable for mowing with varying densities.

Victory discs should be chosen for mowing plants near obstacles. If you need to mow hay grass, prefer steel blades with more gently sharpened teeth. Hard discs with the number of teeth from 16 to 32, well cut plants with thick stems.

attach, disc, brushcutter

For low-power trimmers, blades with minimal torque are better. The smaller the blade, the more the tool will shred the grass. Yes, two-blade discs are most commonly used for cutting homogeneous grass. The main advantage of this type is that it throws the cut plants aside.

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

Why you should put a blade on a grass trimmer

A grass trimmer with a blade installed on it is best used for more comfortable mowing tall and coarse grass in the country. trimmer line on a brushcutter fails in such cases. Thin ones tear very quickly. Using a thick 2.3 mm cord or homemade rope rods force the vegetation onto the bobbin. It increases the load on the engine. As a result, the piston group and other moving parts of the machine wear out very quickly.

If you mow weeds produce electric trimmer without a knife, only a line, even a thick with a figured section, the problem can not be solved. There is always a risk of overheating the electric motor and damaging the flexible shaft. And it’s all about the high torque of the electric motor. The grass coiled up on the spindle creates a strong resistance to the shaft, reminiscent of a speedometer cable, which cannot withstand and twists.

In order to save equipment from premature wear and tear manufacturers have provided the ability to install special blades on grass trimmers. The design and shape of existing cutting elements can easily cope not only with rough and overgrown grass, but also successfully deal with young shrubs.

How to install the blade on the grass trimmer

The blade on the grass trimmer is easy to install. It uses a complete wrench to disengage the cutting head and a pin to lock the gearbox. The procedure is as follows.

  • First of all, you should disconnect the electric grass trimmer from the mains, gasoline trimmer. just shut off. Disconnect and remove the protective cover.
  • Next, you need to align the holes on the gearbox and the shaft, to stick a pin in them and lock the drive.
  • If a bobbin with a fishing line was used, it must be unscrewed clockwise.

As you can see, the procedure is very simple and the same for many brands, whether it is appliances or Husqvarna.

On a side note! If the owner of the device wishes to replace the disc back to the trimmer line, you can install the spool with it in a similar way.

The problems of choosing the discs

In cases where you need to mow the lawn and standard weeds (not more than once a month), then the best choice will be an 8-tooth disc. If tall grass is to be cut, discs with 24 tines are the best choice (they practically do not wind up mowed plants). Still, professionals advise to have in stock several different discs, each of which will be designed for a specific job. Besides, it is preferable to use knives with holes when using an electric tool, because they are lighter and therefore less congestive for the electric motor of the equipment.

For daily work in a professional segment it is better to use discs that are made of alloy steel and have pobedite tips. The ideal is when the entire wheel is made directly of tungsten carbide. Regarding the price tag: discs themselves are not complex devices, so even a Chinese model for 400-700 can last a couple of seasons. But brand models, on the other hand, will last more than five years (with proper maintenance).

Advantages and disadvantages of toothed disc

Metal toothed discs are circular in shape, with multiple teeth along the edges. The tines themselves can be of different types, shapes and sizes. The more teeth, the better the device copes with its task. And the tasks of the toothed type include mowing dense thickets and even small trees. One of the advantages of such parts is that the grass trimmer with them picks up speed faster. At the same time, the moment of inertia also increases, which negatively affects the drive unit, and it fails faster, as the motor overheats and often stops.

This type is also divided into two types. peorized, that is, with holes in the disc itself, and conventional monolithic. The first ones do their job perfectly, but have a high price. The latter are much cheaper, but have a significant disadvantage. their weight. Due to the monolithic metal construction, it is not recommended to put them on grass mowers with an engine capacity of less than 30 cm3. the mechanism simply will not take the load.

When is the use of blades and knives sensible?

When using brushcutters in the countryside, the most popular attachment is a brushcutter line. It has a low price, it is suitable for different trimmer heads, it is safe when working. The disadvantage of using a fishing line is that it is convenient only for mowing low growth. In other situations, the string is immediately clogged, regardless of whether a gasoline or electric grass trimmer model is used. In addition, vegetation wraps around the spindle, which creates significant resistance to the shaft and leads to its breakage. It can also cause piston system failure in gasoline mowers or motor burnout in electric trimmers.

That’s why different attachments are used for cutting tall or tough vegetation. So, to clean high and rough grass, thin shoots of trees and shrubs, it is better to install and use a disc. This nozzle is hammered much less often, which contributes to greater wear resistance of the equipment.

For your information! Given that the engine of electric and battery-powered models is less powerful than that of petrol mowers, the use of the discs is more appropriate for petrol mowers.

Special features of brushcutter blades

Blade discs are available in plastic and metal, and in various shapes to perform a variety of tasks.

  • Two-, three- and four-blade blades with distinctive blades are used for cutting grass and brushwood. However, they are not suitable for making hay, because they shred the shoots, chopping them several times.
  • Massive four-blade discs are designed not only for clearing the ground from grass, but also for cutting hay. They prevent the shoots from being cut too many times, making them better suited for storing for the winter.
  • Discs with cutting edges on all sides for cutting reeds and rushes. These blades are very heavy. a necessary quality to cut through thick stems.
  • Professional sawtooth blades for brushcutters and brush cutters allow to cut small trees and bushes.

Plastic blades are used as an alternative to metal discs. They do not need to be fastened tightly in the head, and they rotate as a result of centrifugal force. The strength of plastic blades is high, so the service life is long enough.

For your information! The advantage of plastic discs is that when they hit an insurmountable obstacle, they bounce, and there is no repeated contact.

What’s the best way to cut the grass?

Before you install the cutting equipment, think of what you are going to mow. If it’s fresh grass, the answer is simple. choose a line for your trimmer.


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Trimmer lines are thin nylon threads. They are also called cord, string or wire. The mowing head has a spool (bobbin) on the inside on which the wire is wound. The bobbin is attached to the shaft, and the motor revolutions are transmitted to it via a gearbox. The line is tipped on the outside. As the bobbin rotates, they also rotate with great speed and force. This is how you cut the grass.

attach, disc, brushcutter

Mowing width ranges from 40 cm to half a metre. The wider the wire, the faster you mow the lawn.

Hold the stringline parallel to the grass when mowing. According to the consultants at the S Bargain Shop, the brushcutter can be driven as you please. in one direction, from right to left, or in both directions. The so-called “square” method. around the perimeter of the field. can also be used. The main thing is not to press the mowing head hard against the ground, because the load on the motor is momentarily increased. It gets very hot, some parts may melt, causing damage to the motor.

the line for the trimmer well cuts the grass of any height. even the highest, with which the lawnmower can not cope. Generally, there are many places where a lawn mower will not pass. narrow places, the edges of lawns, near curbs, flowerbeds, under benches. These are all places for a brushcutter with a string attachment.

The wire is especially useful for mowing grass in the garden, because it can easily slide over tree trunks without damaging them.

It is also convenient to mow grass for hay, but if the vegetation is tough and dense. set the blade.

For which trimmer blades are suitable

Compared to serrated or milling discs, the paddle discs are lightweight and therefore used on low-power trimmers. Bosch has exactly these types of cutting blades in its electric mowers. Their advantage is the minimal moment of inertia, which prevents negative effects on the drive mechanism.

The number of blades affects the shredding of the grass. The smaller the blades, the stronger the grass is mowed. For mowing homogeneous and uniform grass, two-blade discs are used. Their advantage is that they throw the cuttings aside. For mowing grass in the field in hay making, it is recommended to use 4 or more paddle attachments. They do not shred grass and do not load a tool drive gear.

This is interesting!Particular attention must be paid to the thickness of the blade when selecting discs. Manufacturers produce forged and stamped nozzles. Stamped blades cost less, and tend to break off when they hit rocks or other obstacles. It is recommended to choose exclusively forged circles, which differ from stamped ones by the absence of characteristic areas of chipping and shearing.

Plastic discs for grass trimmer. when to use

If metal milling and paddle discs are used on gasoline trimmers, then it is recommended to use plastic discs for electric tools. Their main advantage is their low weight, so the strain on the electric motor is completely eliminated. Structurally, the head is a plastic base plate, on which the blades are mounted on the perimeter. Blades made of soft plastic that does not deform when hitting an obstacle. Blades are mounted on a circular base at an angle of 120 degrees.

They are designed for mowing dense grass with electric trimmers when the trimmer line fails. If the mowing head has a high moment of inertia, it can be reduced by making symmetrical holes. When the teeth are blunted, they need to be sharpened at an angle of 30 degrees, using a grinding wheel with low or medium roughness.

Blade design Use Characteristics
Cutter blade with 40 teeth Gentle cutting of lawn and tall grass. Ideal for mowing grass in fields and forest belts Eliminates winding on the disc and low gearbox load. High performance for larger grass mowing operations
Milling peorized with more than 40 teeth (60-80) For small trees with a stem thickness of 7-8 cm Suitable for mowing grass with small growing trees
Solid blade with 8 to 32 tines Cutting thin and tough bushes of raspberries, currants. Mow grass effectively, but only with powerful equipment Effectively cuts stems of small shrubs. Stress on the gearbox
Blade with one, two and three blades Tough grass, thistles Repeat the grass, shredding it several times, which increases the load on the gearbox
Blade mower with 4 or more blades Brushwood and tough grass brush, can be used for making hay Has a low moment of inertia
Plastic blades For small and dense grass in household plots Does not stress the electric motors of trimmers

Grinding our trimmer blades correctly. what you need to know about it

During the operation of the lawnmower with cutting metal blades, there is a dulling of the blades. It is normal, but you should not continue to use it. Blunt blades have a poor cutting performance therefore you will not only get a poor cutting result but also overheat the tool motor and damage the gearbox. If the blades or teeth of the cutting discs of your trimmer become dull, they must be sharpened. Some people prefer to buy new cutting wheels, which is not rational at all.

This is interesting!All cutting discs can be sharpened, including ones with Pobedite tips. To sharpen a wheel with pobedite, you need a special diamond wheel. Learn more about how to sharpen a disc with a tipped Pobedite tooth for details in this article. A step-by-step description of how to sharpen a grass trimmer blade:

  • First you need to remove the cutting element from the tool. It is not safe to sharpen the tool
  • Inspect the element for suitability. Cracks, chips and other deformations are not allowed. If there are any, it is necessary to replace the device
  • To sharpen the disk, tools and materials such as a sharpener, file, angle grinder are used. What is the best choice depends on the skill of the operator. The easiest and safest way is to use a file. To do this, the cutting equipment is clamped in the jaws of the vice, and the sharpening process is performed manually at an angle of 30 degrees
  • If a sharpener (emery board) or angle grinder is used, it will be necessary to carefully perform the sharpening. When sharpening, the metal must not be allowed to turn red (there will be a release of metal), otherwise it will lead to rapid wear and abrasion of the cutting part
  • The optimal variant, which is recommended for beginners (it is also used by masters with experience) is the use of a file. A file can be used to sharpen the cutting edge as accurately and precisely as possible at an angle, which will positively affect the performance of the tool
  • If you have to grind a milling disc with a large number of teeth, then for such cases it is recommended to use an angle grinder with a thin abrasive wheel

The video below shows how to properly sharpen mower discs with a large number of teeth.

After sharpening a grass trimmer blade, all you have to do is to install it back in place and check the tool’s performance. After sharpening, it is better not to touch the sharp parts, because it can injure you.

To summarize, it should be noted that the effectiveness of grass mowing depends on the right choice of trimmer disc. For mowing the grass on roadsides and paths, a line for trimmer is used, but for fighting weeds in the countryside, as well as for the purpose of making hay in the fields and in forest plantations, lawn mowers with metal discs are used. If your budget allows, it is advisable to buy 3 types of metal blades and try them out for yourself to experience the difference.