How to put the disc on the grass trimmer video

What knives to put on an electric and lawn mower

Before buying and putting a knife on the brushcutter, we will find out what they are and in what cases they are used. Today manufacturers offer the consumer a large number of types of these consumables. In general, all cutting tools designed for mowing grass can be classified:

  • By the type of material from which it is made;
  • By the shape of its cutting blades.

The main material for the manufacture of trimmer knives can be plastic or metal. The use of such consumables largely depends on two parameters:

  • Type of brushcutters;
  • Mowing areas.

For safety reasons, manufacturers do not recommend using steel blades on electric grass trimmers. Almost all brushcutters powered by an electrical network and a battery are equipped with plastic blades. Depending on the manufacturer, they can be of a solid disc-shaped design, with several blades or in the form of a special mowing head providing for the installation of removable plastic blades.

The straight bar for the petrol grass trimmer and the curved bar for the electric

To put a metal knife on an electric grass trimmer is not allowed by its design features.

  • The curved bar of the machine reduces the distance from its working part to the mower’s feet. In the event of a collision of the blades with a stone or other solid object, the grass scythe is thrown at the feet.
  • The high torque we mentioned above, in the event of a metal blade hitting a hard object, transfers a lot of load to the grass trimmer’s flexible shaft and motor. What causes them to fail prematurely.
  • The handle of the electric scythe most often does not have a limiting bar acting as a stop. Which does not exclude injury to the legs.

It is these features that make it possible to use exclusively plastic knives on trimmers with electric motors. When colliding with an obstacle, the blades are destroyed, thereby protecting the mower’s legs from possible injury.

Plastic knives do a good job on overgrown and dry grass. They can mow nettles and burdock stalks.

The use of metal knives only on gasoline trimmers is also due to design features.

  • Straight bar design increases leg clearance for complete safety.
  • Comfortable U-shaped and J-shaped handles provide a firm grip. The D-shaped handles of the brushcutter are equipped with a limiter that rests on the leg of the mower, which does not allow the head to come close to the feet when the cutting disc meets a solid obstacle.
  • The clutch of the gasoline engine allows for smooth acceleration to the optimum level. And when the blade hits a hard surface, it is able to absorb part of the impact.

Thus, gasoline grass trimmers with a metal blade installed are best used in large areas. They will successfully cope not only with high coarse grass, weeds, burdocks and nettles, but also shrubs, as well as young trees.

The shape of the blades of the disc supplied to the grass trimmer does not in any way affect the quality of the work performed. Speed ​​does not depend on them either. Triangular, trapezoidal, rectangular shapes are all the marketing ploy of manufacturers.

If you are planning to harvest hay, it is best to use knives with a large number of blades on the brushcutter. Note discs with eight teeth or discs with four large blades and four additional blades. Two and three bladed knives will chop the grass hard.

Why put a knife on a grass trimmer

A grass trimmer with a knife mounted on it is most convenient to use for more comfortable mowing of tall and coarse grass in the country. The fishing line on the brushcutter does not cope in such cases. Thin tears very quickly. Using 2.3mm thick cord or homemade rods with cables causes the vegetation to wrap around the spool. This increases the load on the engine. As a result, the piston group and other moving parts of the unit wear out very quickly.

If the weeds are mowed with an electric trimmer without a knife, only a fishing line, even a thick one with a curly section, will not solve the problem. There is always a risk of overheating the motor and damaging the flexible shaft. And it’s all about the large torque of the electric motor. Grass wrapped around the spindle creates a strong resistance to the shaft, which resembles a speedometer cable, which does not withstand and twists.

In order to protect the equipment from premature wear, manufacturers have provided for the possibility of installing special knives on grass trimmers. The design and shape of the existing cutting elements allows you to easily cope not only with coarse and overgrown grass, but also successfully deal with young shrub growth.

How to put the knife on the grass trimmer

With the arrival of summer, many homeowners are worried about the question of how to put a knife on a grass trimmer. No less relevant are the questions of why and when it is advisable to replace the line on the brushcutter with a more durable cutting element. In our article we will try to disassemble all this and give useful recommendations to summer residents.

How to put a knife on the grass trimmer correctly

Putting the knife on the grass trimmer is not that difficult. The manufacturer completes its tools with a special pin that allows you to block the gearbox and a wrench with which the spool and fishing line are unscrewed. The most important thing is to observe safety precautions and the sequence of assembly and disassembly when changing cutting elements.

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The algorithm for attaching the knife to the grass trimmer is as follows:

  • Remove the protective cover;
  • We block the drive. To do this, it is necessary to align two holes. in the shaft hub and in the gearbox cup. After combining them, insert a pin into the holes;
  • Unscrew the spool with line or the attachment nut holding the boot in a clockwise direction from the hub (if the grass trimmer has not been used yet);
  • Next, we install the cutting knife, so that the slots on the hub washer coincide with the recesses in the hole of the cutting disc;
  • Install the boot;
  • We tighten the fastening nut (counterclockwise) while holding the locking pin;
  • We tighten it using a tubular wrench;
  • Putting back the protective cover.

As you can see, there is nothing complicated. Now you can safely start mowing weeds on the site.

Preparation. remove and disassemble the spool

On most electric and petrol trims, you will need to remove the spool to replace the line. The FUBAG tool (electric and petrol trimmers) allows you to skip this step. To make the instruction universal, we will still consider it in detail:

Secure the shaft. Insert the locking element into the corresponding hole. It can be a thin screwdriver or a metal rod.

Unscrew the bobbin case. In our example, strictly clockwise.

Unscrew the cover according to the direction indicated on the body.

disc, grass, trimmer, video

The preparatory stage has been passed. You can proceed to winding the fishing line.

How to choose a fishing line. length, diameter, restrictions

IMPORTANT TO REMEMBER! Do not use fishing line or metal cables for the grass trimmer. This replacement is ineffective and dangerous. The rope can injure not only the mower himself, but also those around him.

In terms of length, you should rely on the estimated frequency of use of the grass trimmer. The more often, the more it costs to stock up expenses.

Information about the possible line diameter can be found on the body grass trimmer spools. Most likely, the range will be indicated there. The thickness varies from 1.2 to 4 mm. Choose the appropriate option, taking into account the characteristics of the cultivated area. The larger the diameter, the easier it is to mow tough grass.

Winding Algorithm

Lay the line in the direction indicated on the element body.

Insert the short end into the slot on the side of the spool.

Secure the long end in the opposite groove.

Place the spool of coiled line into the spool body.

Trim the ends of the line, leaving 10 to 15 centimeters.

The line change is complete and now all that remains is to screw the bobbin onto the grass trimmer and you can work.

ATTENTION! Typical line problems

No wonder they say: “Forewarned is forearmed“. Knowing about possible problems and the causes of their occurrence, you can prevent them in a timely manner. We recommend to remember or leave a memo.

Problem Cause Decision
Line break Stones, branches and solid objects in the grass Avoid collision
Poor cord quality Replace with a quality analogue
Head outlet wear Complete replacement of part required
The line is unwound The spring in the coil is weakened Check spring and replace if damaged
The line sticks together Poor line quality, due to which it can melt under the influence of temperature from the heating head Reel in less line or replace with a better line

For a better understanding of the mechanism of the process of changing the line in the spool with a video guide prepared by FUBAG specialists:

Brush blade installation on a stihl weedeater

How To Place The Disc On Your Lawn Mower Correctly

With the arrival of summer, many owners of personal plots are worried about the question, knitted for the purpose of how to put a knife on a grass trimmer. pressing are the questions of why and when it is purposeful to replace the line on the brushcutter with a stronger cutting element. In our article we will try to disassemble this and give useful advice to summer residents.

A grass trimmer with a knife installed at this address is most convenient to use for more comfortable mowing of the highest and hardened grass in the country. The fishing line on the brushcutter does not cope with this option. A narrow one breaks in a short time. The introduction of a thick 4.5.3 mm cord or homemade rods with cables forces the vegetation to wrap around the spool. This increases the load on the engine. For this reason, the piston group and the rest of the moving parts of the unit wear out in a short time.

CIRCULAR Saw Blade on TRIMMER ??? TEST

If you create a weeds mowing with an electronic trimmer without a knife, only a fishing line, even a thick one with a curly section, will not solve the problem. There is always a risk of overheating the motor and damaging the flexible shaft. And the matter to our client remains in the great torque of the electronic motor. The grass wound on the spindle makes a strong resistance to the shaft, which resembles a speedometer cable, which does not withstand and twists.

In order to protect the equipment from early wear, domestic manufacturers have provided for the possibility of installing special knives on grass trimmers. The design and shape of the existing cutting parts allows you to easily handle not only coarse and overgrown grass, but also successfully fight young shrub growth.

disc, grass, trimmer, video

Before taking and putting a knife on the brushcutter, we will find out what they are and where they are used. Now domestic manufacturers offer the consumer many types of these consumables. The entire cutting tool created for mowing grass, of course, is systematized:

Brushcutter knives and their purpose (brushcutter knives)

  • In the manner of the material from which it is made;
  • By the shape of its cutting blades.

The main material for the production of trimmer knives you will like plastic or metal. The introduction of such consumable parts in almost everything depends on 2 characteristics:

From judgments of safety precautions, manufacturers of domestic products do not advise putting iron knives on electronic grass trimmers. All brushcutters powered by an electronic network and battery are equipped with plastic blades. Based on the manufacturer, they will be a solid disc-shaped design, with several blades or in the form of a special mowing head providing for the installation of removable plastic blades.

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The straight bar for the petrol grass trimmer and the curved bar for the electronic

To put an iron knife on the electronic grass trimmer is not allowed by its design features.

  • The curved bar of the machine reduces the distance from its working part to the mower’s feet. For which the design of the collision of the blades with a stone or other hard object is intended, the grass scythe is thrown to the feet.
  • The high torque we mentioned above, for which the iron blade-hard object collision design is designed, transfers a huge load to the flexible grass trimmer shaft and engine. What causes them to break early.
  • The handle of the electric scythe in most cases does not have a limiting bar acting as a stop. Which does not exclude injury to the legs.
disc, grass, trimmer, video

These features are used on trimmers with electronic engines only plastic knives. When colliding with an obstacle, the blades are destroyed, thereby protecting the mower’s legs from possible injuries.

Plastic knives handle well overgrown and dry grass. They understand how to mow nettles and burdock trunks.

The use of iron knives only on gasoline trimmers is also justified by design features.

  • Smooth bar design increases leg clearance for complete safety.
  • Comfortable U-shaped and J-shaped handles for a firm grip. The D-shaped handles of the brushcutter are equipped with a limiter that rests on the mower’s leg, which does not allow the head to come close to the feet when the cutting disc meets a hard obstacle.
  • The clutch of the internal combustion engine allows you to smoothly gain speed to a rational level. And when the blade hits a hard surface, it is able to absorb part of the impact.

Thus, petrol grass trimmers with an installed iron blade are ideal for use on large areas. They will successfully cope not only with the highest coarse grass, weeds, burdocks and nettles, but also with shrubs and young trees.

The shape of the disc blades on the grass trimmer does not affect the quality of the work performed. Speed ​​does not depend on their condition either. Triangular, trapezoidal, rectangular shapes, this is our client’s pre-sale preparation of manufacturers.

If you intend to prepare hay, then the best way is to put knives with a huge number of blades on the brushcutter. Carefully examine the discs with eight teeth, in other words, discs with 4 large blades and 4 additional ones. 2 and 3 bladed knives will crush the grass very much.

Putting the knife on the grass trimmer is not that difficult. The manufacturer completes its tools with a special pin that allows you to lock the gearbox and a wrench, using which the spool and fishing line are unscrewed. The main thing to observe when changing cutting parts is safety precautions and the sequence of assembly and disassembly.

The brushcutter knife does not mow even with sharpening. fix

The method of attaching the blade to the grass trimmer is as follows:

  • Remove the protective cover;
  • We block the drive. For this purpose, you need to match two holes. in the shaft hub and in the gear cup. After combining them, insert a pin into the holes;
  • We unscrew the spool with a fishing line or the fastening nut holding the boot in a clockwise direction from the hub (if the grass trimmer has not yet been used);
  • Next, we install the cutting knife, so that the slots on the hub washer coincide with the recesses in the hole of the cutting disc;
  • Install the boot;
  • We tighten the fastening nut (counterclockwise) while holding the locking pin;
  • We tighten it using a tubular wrench;
  • We return the protective cover to the destination.

As you can see, there are no difficulties. Now there is an option to boldly start mowing weeds in this area.

Replacing the line on the brushcutter.

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When is the use of knives relevant?

When using brushcutters in summer cottages, the most popular attachment is the fishing line. It has a low price, is suitable for different trim heads, and is safe to use. The disadvantage of using a fishing line is that it is convenient only for mowing low growth. In other situations, the string will kick in immediately, regardless of whether a gasoline or electric grass trimmer is used. In addition, vegetation is wound around the spindle, which creates significant resistance on the shaft and leads to its breakage. It can also provoke failure of the piston system in petrol cutters or engine burnout in electric trimmers.

Therefore, for mowing tall or hard vegetation, various attachments are used. So, for harvesting high and coarse grass, thin shoots of trees and shrubs, it is better to install and use a disc. This nozzle clogs up much less frequently, which contributes to greater wear resistance of the equipment.

On a note! Due to the fact that the engine of electric trimmers and battery models is less powerful than on petrol cutters, therefore the use of discs is more relevant for petrol mowers.

Attaching the Blade to the Grass Trimmer

Before changing the knife on the trimmer, the tool must be unplugged from the mains. If we are talking about a brushcutter, then turn off the engine.

How to Fit the Disc to the Grass Trimmer

Attaching the blade to the grass trimmer is very simple. For this, a complete wrench is used that disconnects the cutting attachment and a pin that blocks the gearbox. The procedure is as follows.

  • First of all, the electric grass trimmer should be disconnected from the mains, the gasoline trimmer should be simply turned off. Disconnect the protective cover and move to the side.
  • Next, you need to align the holes on the gearbox and the shaft in order to insert a pin into them and block the drive.
  • If a spool with line was used, it must be unscrewed clockwise.
  • Then you need to find a nut to twist the knife.
  • The next step is to install the knives. Trimmer owners often wonder which side to put the disc on. This must be done so that the marking with numbers and letters is on top.
  • Then you need to put a boot on top, and above it. a fixing nut, which must be tightened tightly with a wrench.
  • The last step is to install the protective cover.
READ  Insert Fishing Line Into Bosch Trimmer

As you can see, the procedure is very simple and the same for many brands, be it STIHL or Husqvarna equipment.

On a note! If the owner of the device wants to replace the disc back on the line, you can install the reel with it in the same way.

Material

It is not recommended to put metal knives on electric scythes, since the design features make their use dangerous for the user. This is due to the curved shape of the rod, the absence of stops on the handles, as well as the high rotation speed.

Important! The straight bar ensures safe use of the grass trimmer when the disc hits an obstacle while spinning. In this situation, it bounces back towards the person, so the curved structure can cause injury.

Plastic knives should be used on gooseneck trimmers for safety reasons. Their purpose is mowing soft grasses, dead wood. Whereas metal discs do an excellent job with tall, dense, hard undergrowth, shrubs, as well as tree shoots.

Features of discs for brushcutters

Knife discs are available in plastic and metal, as well as in various shapes to perform diverse tasks.

  • Two-, three- and four-bladed knives with pronounced blades are used for mowing grass and tree growth. However, they are not suitable for making hay, as they grind the shoots, chopping them several times.
  • Massive four-blade discs are designed not only for clearing the ground from grass, but also for mowing hay. They prevent repeated cutting of the shoots, thus making them suitable for harvesting for the winter.
  • Discs with cutting edges around the perimeter are relevant for beveling reeds and reeds. These knives are very heavy. a necessary quality to cut through thick stems.
  • Professional saw blades for hedge trimmers and brushcutters for cutting small trees and bushes.

Plastic knives are used as an alternative to metal discs. They do not need to be firmly fixed in the head, but they rotate as a result of centrifugal force. The strength of plastic knives is high, so the service life is quite long.

On a note! The advantage of plastic discs is that, hitting an insurmountable obstacle, they bounce off, and repeated contact does not occur.

How to put a knife on the grass trimmer correctly

Putting the knife on the grass trimmer is not that difficult. The manufacturer completes its tools with a special pin that allows you to block the gearbox and a wrench with which the spool and fishing line are unscrewed. The most important thing is to observe safety precautions and the sequence of assembly and disassembly when changing cutting elements.

The algorithm for attaching the knife to the grass trimmer is as follows:

  • Remove the protective cover;
  • We block the drive. To do this, it is necessary to align two holes. in the shaft hub and in the gearbox cup. After combining them, insert a pin into the holes;
  • Unscrew the spool with line or the attachment nut holding the boot in a clockwise direction from the hub (if the grass trimmer has not been used yet);
  • Next, we install the cutting knife, so that the slots on the hub washer coincide with the recesses in the hole of the cutting disc;
  • Install the boot;
  • We tighten the fastening nut (counterclockwise) while holding the locking pin;
  • We tighten it using a tubular wrench;
  • Putting back the protective cover.

As you can see, there is nothing complicated. Now you can safely start mowing weeds on the site.

Use a knife trimmer to cut tall, tough grass or cut wild fruit trees. Plastic knives are placed on low-power electric grass trimmers, and metal knives on more powerful gasoline trimmers. If you have previously worked with a line, you will need to remove the mowing head and replace it with a knife. Further, see detailed instructions on how to do this.

Disk selection criteria

You need to choose a plastic or metal knife, taking into account the area of ​​the site that you plan to process, as well as the type of grass trimmer. electric or gasoline. The number of blades will depend on which growth needs to be removed with the tool. You can choose the desired disk shape, the number of blades and the material of manufacture using the device’s operating instructions. Usually it prescribes which cutters are recommended to be used for solving certain tasks.

Installing a knife on a grass trimmer. video

we suggest you familiarize yourself with the video instructions for replacing the knife on a STIHL petrol trimmer. Please be reminded that the installation steps may vary slightly depending on the model. Therefore, do not forget to look at the instructions.!

If the trimmer disc is used regularly, it will need to be removed from time to time and sharpened or replaced with a new one. This part can be made of metal or plastic, have a different number of blades, but the replacement process remains the same. over, this procedure is similar for equipment from different manufacturers, be it Carver or Huter, but slight differences are possible. It is quite simple to change the knife on the trimmer if you follow the safety precautions and know the correct procedure, the description of which can be found in the user manual. The entire replacement process step by step, as well as the method of self-sharpening knives, will be described in this material.