How To Choose A Line For A Trimmer

How to choose a line for a lawn mower, a trimmer How to choose a line for a lawn mower, a trimmer /: Shurik-ua.Com. Online tool shop

How to choose a line for lawn mowers, trimmers

Choosing the right thickness and shape for the right line can sometimes be a real challenge for trimmer owners or lawn mowers. Below we will try to explain how to choose the right fishing line.

There are two most common line shapes: round and rectangular. Each is suitable for a different purpose. The round shape of the fishing line is intended for mowing grass near curbs, trees and where it is likely that, in addition to grass, it will come into contact with hard objects (small tree branches, for example), thereby the wear resistance indicator will be negative. Angled line and profile are more suitable for mowing. Its sharp corners cut the grass better. But as a rule, such a line is a little more expensive, and when it comes into contact with hard objects, it will also wear out like a round one, based on this, the cost of cutting will increase.


Vendors usually offer fishing line from different materials, it is color-coded and for a comfortable mowing you will be quite satisfied with the average quality of the line. Basically, people buy the cheapest option, but the cheap line tends to tear and wear out quickly.


Naturally, everyone would like to use thick line, but the ideal diameter must be specified according to the characteristics of the particular lawn mower (trimmer) on which the line will be used.


For small trimmers with a power of about 450 W and the location of the electric motor at the bottom of the trimmer head, it is better to use a line with a diameter of 1.3 mm. If the trimmer has a torque limiter, 1.6mm line can be used, but there is a significant possibility of trimmer overheating. With such a line, the trimmer should mow no more than 10-15 minutes. After that, the trimmer should run idle, and then you need to turn it off for 15 minutes.


For more powerful electric trimmers from 600 watts with an electric motor located at the top of the handle trimmer, a line diameter of 1.6 mm is used. For power over 1000 W, 2 mm line can be used. You can mow for a longer time with these trimmers. Also powerful models can be used for mowing larger areas.


For lawn mowers, a fishing line with a diameter of 2 mm or more is used. In the characteristics of lawn mowers, as a rule, the maximum line diameter is indicated. Lawn mowers are more powerful than electric trimmers and are designed for large areas.


Mowing heads (spools) are divided into three classes: hobby, semi-professional and professional. For cheaper mowing heads, fishing line with a diameter of up to 2.5 mm is used, and for semi-professional middle class up to 2.7 mm, and 3 mm for professional expensive mowing heads (spools). The thicker the line, the faster the mowing head wears out and breaks, and the line jams in the mowing head.

How to choose a trimmer line

The trimmer is the right solution for mowing grass in hard-to-reach areas for a wheeled lawnmower, such as around trees, bushes, along fences and paths. The performance of the unit directly depends on the correct choice of line for the trimmer. Cutting tooling requires flexibility, rigidity, and unbreakability. It must have a high level of wear resistance and be tear-resistant.. What are the first things to look for when choosing a trimmer line?

First, the thickness of the thread. In the individual instruction manual for the trimmer, you can find out the required line diameter. It is important to note that you do not need to be guided only by the inscriptions on the bobbin of the lawn mower, since the trimmer kit usually includes universal spools that are suitable for lines of different diameters and engines of different powers. For each trimmer model, we allow its own individual line diameter. So, when installing a fishing line, the diameter of which exceeds the limit value indicated in the operating manual, the resistance to rotation increases, the load on the engine increases, which inevitably leads to overheating and breakdown. Of course, using a fishing line with a smaller diameter will not lead to engine damage, but will significantly increase its wear. Currently, the most common thread is 1.2 mm to 4 mm in diameter. Line diameter variation depends on engine power. For example, for electric or cordless trimmers, which are characterized by low power, a line with a diameter of 1.3 1.6 mm is suitable. For more powerful electric or gasoline trimmers that can cut any grassy vegetation, a 1.8-2mm thread will do. On professional benzo and electric scythes, a thread with a thickness of 2.5 4 mm is used. Such a fishing line will be enough to clear the area from small shrubs.

Secondly, the shape of the section. In most cases, a round trimmer line is enough, it is the most common and affordable. The main disadvantage of such a line is the high noise level produced by the trimmer during operation. But even here modern technology does not stand still. Line manufacturers have been able to reduce noise by using a spiral line. Also, there are star, rectangular or square cross-sections. These sections have sharp edges, which makes the cut of the grass smoother. The curly shape of the fiber increases the productivity of the technique. However, at the same time, the consumption of the line increases, and when using such a thread, problems of feeding from the spool often arise. For the best possible mowing of grass, there are variants with notches and teeth. Notched line designed for mowing weeds and tough vegetation. The main disadvantage of such a line is poor retrieval from semi-automatic spools, so it uses discs into which it is inserted in small pieces. The two-piece round line is more tear resistant and is most suitable for dry and tough grass.

Thirdly, the service life directly depends on the composition of the line. The most common trimmer line is nylon. This thread has a high degree of wear resistance, and also provides effective work at elevated temperatures and loads. In addition, it does not lose its qualities at low temperatures, and does not exfoliate during long-term storage.

The main advantage in favor of choosing a fishing line over other cutting equipment is the ability to use it to delicately trim vegetation, for example, near young trees or small bushes.

Sectional shape

The most often chosen line for electric scythes with a round cross-section. It is inexpensive and the most popular, it mows fresh grass well. Its main drawback is the noise level that is heard during trimmer operation. Line noise is similar in intensity to engine hum. For the best noise reduction, manufacturers suggest using a spiral-shaped line.

Today, they also produce square trimmer line. Of other forms, rectangular and star-shaped are quite often found. Lines with jagged edges and sharp edges are especially productive. These edges cut the grass more evenly.

There are also lines with notches and dents. They can be used for mowing large weeds. The noise level emitted by such a line is low, and due to the increased properties of aerodynamics, the trimmer is given additional power. Such a cutting element is installed on powerful trimmers, with which it is planned to carry out work on overgrown, neglected areas.

To work with this type of fishing line, special heads are installed on the lawn mower. The fishing line is wound on them. It handles all kinds of grasses (especially weeds) and shrubs. But its cost is quite high. The consumption of such a line is also high, since when it is fed from the reel, it can be difficult to extract it. It is usually used with discs into which it is inserted in small sections.

There is also a two-piece twisted trimmer line. Its purpose is high-quality mowing of dead wood. It is distinguished by its round cross-section, tear resistance and increased strength. It is supplied with a core made from a different material. Twisted line is only suitable for petrol trimmers. She is able to cope even with small shrubs. The main disadvantage is its high cost. For daily work, it is quite expensive to acquire twisted line.

Line composition

It is the composition that determines the life of the line. It is often made from nylon. It wears out slowly and improves performance efficiency at high temperatures and heavy loads. The material retains its working properties for a long time, low temperatures do not affect it, as well as prolonged work.

Coaxial trimmer line is considered one of the strongest. It has a dense core, and therefore wears out gradually. Such a line is difficult to cut with a knife and creates little noise during operation. Also now there is a fishing line, which includes inclusions of aluminum.

How and which line to choose for a trimmer

People working in the country may need a trimmer, however, not everyone knows what it is, how to choose a line for a trimmer, and what it is for. A trimmer is a device that allows you to accurately mow grass near trees, fences, paths. The operation of the device depends on the type of equipment, which is often used as a cutting line. It affects not only the external condition of the lawn, but also the performance of the trimmer. The main requirements are for it to bend, have strength and rigidity.

  • The main parameters of the trimmer line
  • Thread thickness
  • Sectional shape
  • Line composition
  • Line selection for the lawn mower
  • What nuances should be observed when working

Steel center thread

To deal with really problematic areas, sellers recommend fishing line with a metal core. They last longer, cope in difficult conditions. Metal-reinforced threads are used for professional purposes.

how to choose a line for a trimmer

The core increases resistance to rupture. They can be square or round, approximately 3 mm thick. Naturally, the prices for such are higher, but the mowing result is excellent.

Which line is better?

There is no definite answer to this question. Round types are universal, but star-shaped cords are not suitable for everyone. Experienced workers believe: the correct selection of thread will increase productivity, save a quarter of time for cleaning the yard.

It is necessary to take into account the category of the device for which the purchase of the cutting device is planned. It is believed that twisted ones are best suited for beveling all trimmers (except for gasoline ones, they should be given cords with metal in the center). Twisted lines cut grass easily, which is not always the case with smooth lines.

The thinner the threads, the easier the bevel, however, their wear resistance is less, they quickly break or wear off. And the fat ones overload the device, spoil the lawn, as they crush the greenery.


There are options with notches and grooves, which allow you to mow impassable weeds. The volume level is low, additional power is provided.

The main requirement for the thickness of the line, it must correspond to the power of the trimmer motor


For power tools with a power of 500 W, a line with a thickness of no more than 1 mm should be used; for trimmers with an engine power of about 1 kW, you can buy a line with a thickness of 2 mm.

In devices driven by gasoline engines, feel free to install a cutting line with a thickness of 2 to 4 mm.

Electric trimmers are especially sensitive to the correct choice of the thickness of the fishing line: a fishing line with a thickness greater than the recommended one will provide significant resistance to the rotation of the electric motor, which will lead to its overheating, and in the case of repeated overheating, the tool will fail.

How to determine how thick the line should be? Information about this is necessarily available in the technical characteristics of the trimmer, and on many packages with fishing line, they indicate for devices of what power it is recommended.

Cord thickness

The trimmer line section ranges from 1.2mm to 4mm.

  • 1.2 mm 1.6 mm thin string designed for permanent lawn care. It is used in low-power devices up to 0.5 kW. This is the standard line for electric trimmers.
  • From 2 mm to 2.4 mm, it is suitable for devices with a power of 1 kW. This is the most common option, as it allows you to cut both young and rather tough grown grass. Since the lawn in the dachas is looked after a little less often than it should be, the 2.4 mm cord turns out to be very useful.
  • 3mm 3.2mm is used for powerful gasoline appliances. Their task: to cope not only with grass, but also with thick stems of weeds and dead wood.

The string is sold in a package of coils, the length ranges from 10 to 100 m. However, there are also options for sale on a cut. In the photo, various types of cord with a cross section of 2 mm, 3 mm, 4 mm.

Why lawn mowers?

This type of gardening technique is designed for small areas where maneuverability is more important than productivity. If we are talking about the same flower bed, then mowing the grass in the immediate vicinity of flowers using a wheeled lawn mower is unrealistic. The trimmer, electric or petrol, will do the job perfectly.

The essence of his work is as follows: the fishing line or knife rotates at a fairly high speed and cut off the stems. A string or cord is used specifically for cutting grass. Which trimmer line is best depends on the task. For soft and hard grass, respectively, a cord with different technical characteristics is needed.

Trimmer line: features

There are several parameters to consider when choosing the right string. Firstly, the characteristics of the device must indicate how thick the fishing line can be. When trying to thread a cord with a large diameter, the thread on the spool will become tangled, the engine will overheat, and the bushings will wear out much faster. Secondly, the task of mowing lawn grass or cutting dead wood matters. The power of the device itself also sets its limits.