How to change the spool to disk on a trimmer

When to use a disc, not a fishing line

For dacha owners, landowners, lawn lovers, the grass trimmer is an assistant that speeds up routine work. When using the tool, there are a number of questions related to what is preferable to use nozzles, how to make their own replacement.

Chain saw blades often use fishing line, which is cheaper than blades. In addition to the price, it also has the following practical advantages:

The disadvantage of a fishing line is that it is only suitable for cutting low grass, because otherwise it often clogs. This is true for both electric and petrol-driven mowers. When the grass is wound around the spindle, there is a lot of resistance on the shaft, and it gets damaged. The piston system can also malfunction (with petrol mowers) or overheat and burn out the electric motor (with electric mowers).

In some cases knives are more effective. They are used for mowing:

  • High and coarse grass cover;
  • weeds;
  • tree shoots;
  • domestic (e.g., raspberries, currants) and wild (rose hips) shrubs.

thanks to the use of blades, the tool wears down more slowly: this is due to the fact that it is less likely to be clogged.

How to replace string trimmer edger line

The cutting attachments of this type are also called discs or cutters, but the point doesn’t change.

In order to thread a line into a trimmer head successfully, it is important not to miscalculate with the choice of consumable material. The thicker the cord, the thicker and tougher the grass it can cut. Often a universal line with a diameter of 2 mm is used. You can find the right diameter for your mower in the following ways:

  • See the information on the thickness of the line in the instructions that came with the trimmer.
  • Pay attention to the bobbin itself. Sometimes it is marked with information about the possible line diameters.
  • Another option is to try inserting a cord into the outlet. If it passes through it without difficulty, then the chosen line diameter is suitable for use.

Grass trimmer reel

You can choose a cord according to the type of engine. If the line is too thick, it will increase the resistance to rotation. in this case, the motor will overheat a lot and will soon fail. Helpful tips:

  • For an electric device with a motor less than 500 V, a 1.3 mm cord is fine. If you can’t find one, you can use 1.6 mm fishing line. If the power is more than 1 kW, then choose a cord with a diameter of 2 mm.
  • In a gasoline grass trimmer, the shaft mower matters. A 2 mm cord is often used for the bent version. If the shaft is straight, then set the thread 2,4-2,5 or 3 mm. The thickest line is installed on powerful devices. from 1.3 kW.

Pay attention to the type of cord cross-section as well. Some popular choices:

  • The most common round-cut lines. They mow fresh grass well, but cope worse with shrubs, deadwood.
  • Twisted (spiral) cord is not very strong, but not bad for thin young grass.
  • Serrated cord with sharp edges is ideal for large weeds in a neglected area.
  • You can mow the lawn more evenly with a rectangular, starred or square grass trimmer line, but they are not very durable.
  • The strongest is a two-piece cord with an inner core and a circular section.
change, spool, disk, trimmer

Types of lines for grass trimmer

Do not use wire, metal cords and ropes, or ordinary fishing line instead. The device will be dangerous for both the user and others. So the rope or similar products will gradually start to trip, causing their ends to unravel and the small pieces to fly off at a high rate of speed.

Before you change the blade on your trimmer, it’s imperative that the tool be unplugged. If we are talking about brushcutter. to turn off the engine.

Stages of installing the blade on the grass trimmer. instructions

  • If grass trimmer has not been used before. Use a hexagon socket wrench (or a bar with a suitable diameter. it may be a nail) in the gearbox hole. This is to prevent the shaft from spinning. Unscrew the mounting nut and remove the gear cup from the shaft.
  • If a mowing head is installed. As in the first paragraph of this instruction manual, the lawn trimmer is designed to give you the best cutting results.1, insert the wrench into the gear hole. Hold the wrench and unscrew the mowing head.
  • Install the washer on the hub, then the knife. Make sure that the lugs are in line with the notches. Then the knife will be properly centered.
  • Place the thrust washer and gear cup on top of the blade.
  • Install the fastening nut on the shaft and tighten it counterclockwise. To do this, you will need a socket wrench.
  • the threaded end groove is made with a 0.3 mm pitch. pay attention. to prevent the nut from unscrewing during operation, most gasoline trimmers have a stud that is inserted into the hole in the shaft.

If the grass trimmer blade is used regularly, it should 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 to the technology of different manufacturers, whether Carver or Huter, but there may be slight differences. Changing the blade on a trimmer is fairly easy if you observe the safety precautions and know the correct procedure, a description of which can be found in the user manual. This material will describe the whole process of replacement in stages, as well as the method of self-sharpening blades.

When using blades is relevant

When using a braid on the cottage areas, the most popular attachment is a fishing line. Low cost, suitable for various three-dimensional mowing heads, safe to use. the disadvantage of using fishing line is that it is only suitable for low-growth mowing. In other situations, the cord is immediately clogged, regardless of whether a gasoline or electric grass trimmer model is used. In addition, the plant winds up on the spindle, which creates considerable resistance to the shaft and causes it to break. This can also lead to failure of the piston system of trimmers or burnout of the motor in electric trimmers.

Therefore use different attachments to cut tall or hard grass. Therefore, it is better to install and use a disc to collect tall and coarse grass, thin shoots of trees and shrubs This nozzle is clogged much less often, which contributes to the wear resistance of the equipment.

Special note! Due to the fact that the engine of electric trimmers and cordless models is less powerful than on gas mowers, the use of discs is more relevant for gas mowers.

Features of mower discs

Blade discs are made of plastic and metal, as well as different shapes to perform various tasks.

Plastic blades are used as an alternative to metal discs. They do not need to be installed tightly in the head, but they rotate due to centrifugal force. The durability of plastic blades is high, so the service life is quite long.

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

Advantages of trimmer discs compared to fishing line

Trimmer disk compared to the cord, has its own advantages. Knowing these advantages is necessary in order to ultimately decide whether to buy and use metal cutting blades. Consider all the advantages of trimmer discs:

There are also disadvantages to the cutting devices for trimmers under consideration. The first disadvantage is that the tool cannot be used with the disc when mowing grass near obstacles in the form of trees, buildings, rocks, benches, etc.п. When the disc collides with an obstacle, the drive brakes, which is reflected in the form of such disadvantages:

If you plan to mow thick grass in the field, it is impossible to do without a grass trimmer with a metal disk installed. The line is used to mow fine grass on the homestead territories near obstacles.

How to install the disk on the trimmer

Grass trimmer with a blade installed on it is most convenient to use for more comfortable mowing tall and coarse grass in the country. The line on the brushcutter is no good in such cases. The thin one tears very quickly. Using a thick 2.3 mm cord or homemade rope ropes force vegetation to wind up on the bobbin. This increases the load on the engine. The result is very rapid wear and tear on the piston group and other moving parts of the machine.

If you mow weeds produce electric trimmer without a knife, a single line, even if thick with a figured section, the problem can not solve. There is always a risk of overheating the electric motor and damaging the flexible shaft. It’s all about the high torque of the electric motor. Grass wrapped around the spindle creates a strong resistance to the shaft, reminiscent of a speedometer cable, which cannot withstand and twists.

In order to save the technique from premature wear, manufacturers have provided the opportunity to install special knives on the grass trimmers. The design and shape of the existing cutting elements allow you to easily cope not only with rough and overgrown grass, but also successfully deal with young shrubs.

  • Engine overheating
  • Damaged parts of the blade that become dull
  • Transmission mechanisms fail. Flexible and rigid shafts (transmission)

If you plan to mow thick grass in the field, this is impossible without a grass trimmer with a metal disc. The rod is used for mowing small grass in enclosed areas near obstacles.

Choosing the best blade

Some manufacturers of trimmers with a rigid design of the transmission shaft complete the tool not only with lines, but also with steel discs. This is not always the case, and if such a situation is appropriate, a metal disc is installed instead of a mower with a fishing line, if necessary. However, this is not always the case. First, you need to make sure you can use a steel blade on your trimmer. Consider all types and designs of cutting blades designed for trimmers.

Disk toothed blade in those cases where it is used

Metal gears are shaped like a circle with the appropriate number of teeth at the base. These teeth come in many shapes, forms, and sizes. The more teeth, the more efficient they are for tackling dense grass and even small trees. Cutter wheels for trimmers gather speed faster, which is an advantage. They also have a high moment of inertia, which is a disadvantage. This has a negative effect on the tool drive unit because the starting power is increased and as a result, the motor overheats during frequent stops. In addition, the equipment is characterized by the presence and absence of peoria.

  • Perforated wheels with holes and a large number of teeth up to 40 teeth. Deal effectively with mowing from thick, tall and small, large grass and shrubs. The more teeth, the less grass. The grass does not curl around the circular saw with multiple teeth. Discs with 60-80 teeth. Intended for mowing grass with small trees in the area, the stem thickness does not exceed 7 cm.
  • Solid. discs that do not have holes in their construction. They have a lot of weight, so it is not recommended to apply them to gas braids with an engine capacity of up to 30 cm3. The tool simply cannot pull out a heavy cutting element. Compared to peorized mowers, they weigh 1.5 to 2 times more. Deals effectively with dense and sparse grass. The smaller the number of blades, the more the grass is cut and the greater the load on the motor. The stress on the gearbox also depends on the tooth grinding angle.
change, spool, disk, trimmer

If the operator is faced with the task of mowing dense grass and dead wood, it is recommended to choose discs with peoria and a large number of teeth. Hard discs are suitable for mowing green grass of varying density, but they are used only on powerful gas mowers with an engine capacity of more than 40 cm3.

Where blades fit on trimmers?

Compared to toothed or milling discs, the blades are lightweight, so they are used on trimmers with low power consumption. Bosch supplies its lawnmowers with these cutting blades. 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 more grass is mowed. Two-blade discs are used for mowing uniform and homogeneous grass. Their advantage is that they throw the cuttings aside. 4 or more mounted blades are recommended for field mowing in hay harvests. They do not shred grass clippings and do not load the tool’s drive mechanism.

Plastic discs on a trimmer. when applying

If gas grass trimmers and metal blades are used, plastic wheels are recommended for power tools. Their main advantage is their low weight, so the load on the electric motor is completely eliminated. Structurally, the nozzle is a plastic base on which knives are mounted on the perimeter. The blades are made of soft plastic, which bends without deforming when in contact with an obstacle. The blades are mounted on a circular base at an angle of 120 degrees.

They are designed to mow dense grass with electric trimmers when the line fails. If the nozzle has a high moment of inertia, it can be reduced by making symmetrical holes. When the teeth are blunt, they should be sharpened at a 30 degree angle, using a grinding wheel with low to medium roughness.

How to check if a magneto is working properly

The magneto is the main part in the engine ignition system and is a coil with primary and secondary windings arranged around a core. Often due to a faulty magneto, the spark on the spark plug is lost and the fuel does not ignite. To check the coil you need to use a tester, and do the following.

  • On the tester, switching to the resistance measurement mode, you must set 200 ohms. The primary winding will be tested this way.
  • Connect one electrode of the tester to the “mass” of the coil and the second to the contact that comes out of the magneto. Normally, the resistance should be between 0.4 and 2 ohms.
  • To check the secondary winding you need to set the switch of the device to 20 kohms. Further, one probe of the device is inserted into the cap of the spark plug, and the second is connected to “mass”. Under normal conditions, resistance readings should be in the range of 4 to 6 ohms or greater (model dependent).

If an open circuit occurs, the instrument should read infinity and 0 (zero) when shorted.

If you do not have a tester, you can use the following method, being very careful so that the electrode does not touch the cylinder, otherwise the coil will burn out.

  • Remove the cap from the candle. It is not necessary to unscrew the spark plug to retain compression.
  • A flat nail should be inserted in the cap. The nail should be of such a diameter that it will stick well to the cap.
  • Tie a cap with a nail to the cylinder using dielectric so that the gap between the electrode and the cylinder body is between 5.5 and 7 mm (but in no case touching the “mass”).
  • Use the starter to simulate starting the engine several times. The ignition button must be switched on.
  • Observe to see if a spark appears and what color it is.

Normally, the spark should be strong and white or have a bluish tint. If the spark is weak and its color is orange or yellow, it indicates a defective magneto.

Also note that sometimes a magneto can give a good spark when it is cold. But after heating it stops producing current due to internal faults. As soon as the reel has cooled down, the grass trimmer starts up again and runs for a while until the magneto heats up again. Such a spool must be replaced.

Sometimes a similar heating problem can be caused by the spark plug, even if the coil is serviceable, so you need to check both parts.

Grass trimmer spool repair with your own hands

the grass trimmer, whether it is gasoline or electric, is the only true solution for cutting grass in hard-to-reach places that a wheeled mower cannot cope with. As a cutting tool in trimmers use metal knives or a special fishing line, which is tucked into the grass trimmer spool. But, unfortunately, trimmer heads in the process of operation eventually fall into disrepair. Some malfunctions can be repaired with your own hands, and some require complete replacement of the mowing head.