How to remove the disc from the grass trimmer

How to put a disc on an Echo grass trimmer

For the best understanding, let’s look at the main types of discs for angle grinder and define their application:

  • Cutting discs. These are the most widely used consumables for angle grinder. Their main purpose is to work with metal, stone and wood. A variety of cutting discs for angle grinders are diamond discs. This is a heavy-duty tool for machining high-strength materials such as reinforced concrete, tile, stoneware, marble.
  • Grinding and skinning wheels. As it becomes clear from the name, this type of wheel is used for grinding different materials, such as polishing products made of stone, or to remove (roughing) the top layer, such as the elimination of rust or old paint coatings.

Classic method. replacing the HDD

So, the battery is removed, the cover is unscrewed. Now it’s time to remove the hard drive: the drive is attached by several screws. Unscrew them and then gently pull the hard drive out of the SATA-slot. On this place we need to install a solid state drive and fasten the SSD with screws. The final installation steps: attach the cover, put the battery on and turn on the laptop.

While booting the laptop (for example, HP 250 G5) the user will need to enter the BIOS. There it will see that the system has detected the SSD. Now you need to check what mode the drive is running in under the tab called Advanced: if not in AHCI, switch the drive to that mode and save.

The last step is to install the operating system.

How to remove line for trimmer from different types of spools

The instruction manual for each grass trimmer has a detailed description of the standard line replacement, which involves removing the old cord. If you have an OEM trimmer head or other model of the same type, then follow the instructions in the instruction manual.

If you have a different type of spool installed, or the trimmer’s fishing line is broken inside the trimmer head, then you can’t do without disassembling or removing this part (depends on the type of spool) on your trimmer, so below we share the recommendations that will help you pull the trimmer’s fishing line out of any type of spool.

Mechanical non-detachable

In these spools, the fixation of the fishing line is due to its conduction through the curved channels of different shapes, that is, the cord due to its rigidity holds itself. The only problem is that the cutting string is located on both sides of the head, so it is impossible to remove it comfortably without removing the part from the grass trimmer.

To unwind it, remove the spool from the grass trimmer, using a wrench and any suitable retainer, such as a nail or stud, and having access to both sides of the part, pull out the cord.

Mechanical collapsible

To remove the remaining cord from a collapsible mechanical spool, use the wrench that comes with it to unscrew the clamping bolt, then pull the material out of the holes.

If the bolt head is clogged with grass clippings and dirt (this happens when mowing after rain or watering) and you cannot insert an Allen key into the head, take the machine home, where you either wash the head directly on the trimmer or remove it using a gas wrench and then wash it separately. Once the bobbin is cleaned, you can easily unscrew the bolt and remove the rest of the string.

Automatic and semi-automatic

What these trimmer heads have in common is the line feed system. when the button is pressed, you just pull the piece of filament sticking out of the body and it will come out at some length. by pushing the button and pulling the string out step by step, you will be able to uncoil the spool completely.

If the line for the trimmer broke inside the body, this method will not work, because there is nothing to grasp, and even if you get to pull from one side, then the other string will be restrained in the body and unwind it will not work.

If the simple method doesn’t work, squeeze a couple of catches on the sides of the body next to the cover with your fingers and remove the latter to gain access to the bobbin. Then pull out the bobbin with the rest of the line and not only remove the string, but also look for the reason why the regular feed didn’t work.

If you can not remove the cover, not enough finger strength or for some other reason, then twist the coil with the grass trimmer as a whole. If you have a lawnmower or electric mower with a straight bar, then twist the spool clockwise, but if the bar is curved, then counterclockwise.

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This method does not work for electric vacuum cleaners with a bottom-mounted motor, because there is no thread on the shaft. Instead of it the slits, and the trimmer head is planted “hot”, that is, if you could not disassemble the head on the spot, you will have to take the machine to a workshop or something to make up at home.

If jammed because the line is too thick

Owners of trimmers often disregard the information in the manual about the maximum thickness of the line and put a larger cord, because this increases the efficiency of mowing.

The result of such an attitude is that the string gets jammed inside the reel, which causes the automatic feed to stop working, because the cord gets stuck in the holes of the body and gets too tight inside the bobbin.

The most unpleasant in this situation is the inability to pull the bobbin normally, because the line for the trimmer stuck in the body blocks it. In the field, you can (if you have a suitable tool handy) cut the string around the edge of the body and then press it inside with the Phillips screwdriver that comes with most trimmers.

When this method does not work, put the cover back on and twist the bobbin assembly as described above, then disassemble it on the table.

If you want to use it with a thicker line that is approved for your electric mower or lawnmower, install new plates with the appropriate calibration holes (not available on all trimmer heads).

If the cord is kinked inside the spool

It happens if the cutting line is not wound correctly or if there is something sticky on it, in which case remove the cover and pull the bobbin out.

Even a badly twisted cord can easily pass through the holes in the bobbin case, so it is not difficult to remove the bobbin.

Then unwind the trimmer line and either rewind it correctly or rewind a new line that is not smeared with a sticky substance.

STIHL FS250 lawnmower. Specifications, description, operation and maintenance

The powerful STIHL FS 250 is designed for professional use in agriculture and forestry. With an engine output of 2.2 liters for the grass trimmer.с., that makes it possible to effectively mow grass of varying degrees of hardness over large areas, cut thickets, clear areas of wild growth of young shrubs, non-thick trees.

remove, disc, grass, trimmer

Due to its high technical characteristics gasoline grass trimmer has found wide application in utilities.

The BEST TRIMMER HEAD ever made! How to install a Universal Speed Feed on most any trimmer.

How to remove the trimmer head?

The removal procedure for top mounted models is the same for all models. first fix the output shaft with a suitable tool such as a hexagon socket, then undo the cylinder or fixation nut.

The drum can be unscrewed by hand, because its diameter is large enough to effectively grip it with the palm of your hand, the nut is unscrewed with the standard wrench that comes with each electric mower.

Here are detailed instructions that you can follow to remove most types of spools from a grass trimmer with a top-mounted motor:

  • make sure that the machine is unplugged;
  • clean the space between the blade of grass and the spool;
  • rotate the head so that the fixing holes are aligned;
  • insert a standard hex wrench or any other appropriate tool into the aligned holes;
  • wrap your palm around the body or put a wrench on the nut, then turn in the appropriate direction (clockwise for machines with a straight boom, counterclockwise for those with a bent boom).

On some machines with a curved boom, there is no hole to secure the shaft; instead, the base is secured to the shaft with a bolt.

If this is the type of electric mower you have, then proceed as follows:

  • Make sure the machine is unplugged;
  • squeeze the locking bolts together with your fingers;
  • Carefully remove the cover;
  • Remove the bobbin and other parts;
  • holding the base by hand, unscrew the fixing bolt by turning it counterclockwise;
  • Remove the base by rocking it slightly from side to side, if you can not remove it, turn it 45-90 degrees and rock it again, trying to remove it.

On devices with a lower motor, the principle of fixing the mowing head is different. it is pressed on the spline shaft with the heating of the latter or other ways of fixation, so we recommend to remove this part yourself only to those who are familiar with similar works and owns the appropriate tools.

On some models, the shaft is equipped with a slot for locking, but to get to it, you often have to saw through the removable spool.

Reel types

There are 3 types of the most popular trimmer heads:


Mechanical spool. a plastic or metal disk, which in different ways to fix one or more small segments of the line, because of what it has to manually constantly change the line for the trimmer.

Here are the most popular models of such heads:

Semi-automatic (collapsible)

Despite the variety of models and differences in appearance, the reels of this type are designed and work on the same principle.

The base connects the other trimmer head components to the brushcutter or electric mower through a threaded bushing fused into it, so each reel fits only that trimmer with a gearbox or lower motor shaft diameter that matches the bushing’s diameter.

There is a spring inside the base that supports the bobbin, pushing the pressure part outward through the removable housing.

On the bobbin and body have locks that prevent the former from turning, but when the operator strikes the ground, the bobbin is out of mesh with the locks of the removable body and rotates freely.

Holes are made in the removable body for the string, and they are located so that the yield of the line from the bobbin is noticeably higher, this ensures a reliable fixation of the line in working condition.

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When the operator hits the ground with the pressure part, the bobbin enters the body and all the holes through which the line for the trimmer is running are aligned. Then the centrifugal force pulls some of the wound string outward, and when the pressure on the pressure part disappears, the bobbin comes out of the housing and takes up its working position again.

Automatic (non-disassembled)

Regardless of the model and manufacturer, all automatic reels are designed and work on the same principle.

They consist of the following parts:

A threaded bushing is soldered into the base body, and ratchet retainers are installed on the inside surface, which allows the bobbin to rotate in one direction only. There is a through channel inside the bobbin for the line to be threaded. The cap is firmly fitted to the bobbin, and the curved edges make it easy to rotate it to wind the line.

What types of trimmer blades there are

Initially, we note that metal discs can be used not only on gasoline, but also on electric trimmers. The main condition for using metal cutting blades on the equipment is that the transmission mechanism (shaft or gearbox) must be of the rigid type. A rigid type reducer is a metal shaft that transmits torque from an electric or gasoline engine to the tool.

There are trimmer models with flexible shafts, whose gearboxes are designed with a steel cable. These are usually low-powered electric lawn mowers that are not designed for heavy loads, as well as domestic lawn mowers. Do not use metal discs on trimmers with a flexible shaft (only plastic discs are allowed), since this will lead to a rapid failure of the gearbox. Before you buy metal cutters, you will need to find out the type of transmission mechanism of your tool. rigid or flexible.

What type of transmission mechanism is used on the trimmer, it is specified in the technical description to the tool. If the grass trimmer has a curved boom, a flexible shaft is used in its design. Tools with a straight boom can be equipped with rigid and flexible gearboxes, which depends on the power of the grass trimmer.

Trimmer knives are classified according to the following characteristics:

  • Material of manufacture. they come in plastic and metal. Plastic blades are less efficient than metal blades, but they put less strain on the tool’s shaft and drive mechanism. Plastic discs are used on electric trimmers and home-use chain saws
  • Design of cutting devices. There are two types of steel discs. paddle discs and toothed (milled) discs. Plastic blades are available in the form of blades. Toothed devices have a similar design with circular discs, and paddle-shaped devices have large flat blades
  • Number of cutting edges. Number of teeth and blades on the discs are different, which affects the performance of the cutting equipment. Toothed discs have up to 80 links, but toothed blades have one to four links
  • Additional spraying. steel toothed discs are additionally equipped with pobedite tips for use in hilly terrain. When in contact with obstacles like earth and stones the teeth are not deformed and do not blunt, which is possible due to PBN tips. Specialists say that devices with carbide tips do not last long. Brazing quickly wears out and the cutter is then used without pobedite

Plastic blades for trimmers not only cost less than metal blades, but they also do not put high loads on the motor and transmission mechanism. This is especially true when the blade encounters obstacles. The more elastic the cutting blade, the less likely the plastic discs are to deform.

This is interesting!Toothed discs with a large number of links are used for mowing different grass. dry grass, green lawn and thick-stemmed. The cut with such a disc is straight, clean and smooth. In addition, the large number of teeth prevents rapid blunting, and the additional holes on the cutting wheel surface (peorings) are not only for cooling, but also to reduce weight and increase inertia.

Blades for brushcutters and their application (blades for brushcutters)

The main material for the production of trimmer blades you like plastic or metal. Implementation of such expendable parts almost all depends on the 2. x characteristics:

For safety reasons, manufacturers of domestic not advise putting iron knives on electronic grass trimmers. All brushcutters with electronic and battery power are fitted with plastic blades. according to the manufacturer they will be of solid disc shape, with several blades or in the form of a special mowing head with removable plastic blades.

flat boom for gasoline grass trimmers and curved boom for electronic trimmers

To put an iron blade on the electronic grass trimmer does not allow its design features.

  • The curved boom of the machine reduces the distance from its operating part to the mower’s legs. For which the design is designed collision blades with a rock or other rigid object grass trimmer blades are thrown to your feet.
  • The highest torque, we mentioned above, for which the design of the collision of an iron blade with a rigid object, transmits a huge load to the flexible shaft of the trimmer for grass and its engine. Which causes their early breakage.
  • Handle of an electric mower in most cases does not have a stop bar. Which doesn’t rule out foot injury.
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These features use only plastic knives on trimmers with electronic motors. When the blades collide with an obstacle, they collapse, thus protecting the mower’s legs from possible injury.

Plastic blades are perfect for overgrown and dry grass. They can mow nettles and burdock trunks.

Using iron knives only on gasoline trimmers also justified by design features.

  • The smooth boom design increases distance to the feet, which provides complete safety to the mower.
  • Comfortable U-shaped and J-shaped handles give you a firm grip. D-handles of the brushcutter are equipped with a stop that rests against the hedge trimmer’s leg to keep the cutting head from coming into contact with a hard obstacle.
  • The clutch of the internal combustion engine allows to gain speed smoothly to a rational level. And if the blade hits a hard surface, it can absorb part of the impact.

Thus, gasoline grass trimmers with installed iron blade are ideal for large areas. They will successfully manage not only the highest coarse grass, weeds, burdocks and nettles, but also bushes and young trees.

The shape of the blade on the disc supplied to the grass trimmer does not affect the quality of work performed. Neither does speed depend on their condition. Triangular, trapezoidal, rectangular shapes.

If you intend to harvest hay, it is best to use brushcutters with a larger number of blades. Carefully observe discs with eight teeth, otherwise discs with four large blades and four additional blades. The 2 or 3-blade blades will shred the grass very finely.

The blade on the grass trimmer is not so difficult. The manufacturer equips its tools with a special pin, which allows you to lock the gearbox and a wrench, using which unscrews the bobbin with a fishing line. The main thing when changing cutting parts is to observe safety precautions and the sequence of disassembly.


Putting it to the test

For safety it is necessary to wear a protective helmet with a transparent face shield and gloves on the hands. At first we try to remove thin dry branches, gradually moving on to larger ones, and finish the test by cutting down dry and semi-dry tree trunks with a diameter of 7-8 cm.

It’s clear that the diamond disc grass trimmer works effectively, safely and reliably. Both cross and diagonal cuts are very smooth. They do not show crumpled and torn wood fibers. Mowing grass with the diamond disc is also quite comfortable, efficient and productive regardless of its height, density and degree of dryness. The grass trimmer with circular saw blade not only fulfills its direct function (grass mowing) perfectly, but also extends its range of applications (removing limbs and branches from trees, and sawing down non-thick trunks). Attention! It is not a good idea to fit large diameter and thicker circular saw blades on your brushcutter as this will increase the stress on the gearbox and engine and could lead to premature breakdown. It will also reduce the safety of working with such a tool, which should not be allowed under any circumstances.

Sharpening disc

Regardless of disc quality, it blunts over time and starts to cut the grass badly. If the knives are still relatively new and replacement is impractical, you can sharpen them with your own hands.

Important! Only discs without hardfacing are good for sharpening. discs must be discarded and replaced with new discs

disassemble the trimmer for grass, remove the knives; carefully inspect the disk. if cracks are found, it is better to replace the part with a new one, as its further operation is not safe; bent blades can be carefully bent with a hammer; given the size of the disk, you need to pick up a file on metal, this will provide more convenient work; at an angle of 30 ° equally sharpen all upper cutting edges of disks; collect the trimmer for grass in the reverse order.

To sharpen the disc, you can use an emery machine at low speed with a medium grit emery wheel. With such a tool, the process will move much faster. for safety gloves are needed for hands and face protection goggles or face mask are needed.

So, to mow the grass on gasoline and electric trimmers are used plastic and metal discs of various shapes and with a different set of blades. They are chosen according to the type of work to be done and the size of the area to be mowed. If the blades on the mower become blunt, they can easily be sharpened or replaced by yourself

Despite the simplicity of the procedure, you must be careful and keep safety in mind so as not to injure yourself due to carelessness or not to damage the technique. For a more detailed description of replacing the blades for a particular model of grass trimmer, see the instruction manual or the official website of the manufacturer

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