Selecting the Choose the Best Brush Cutter Blades 2018
A brush cutter consists of a bar, at one end of which there is an engine at the top, and below is a head with a coil, into which a line is tucked. The kit also includes a blade. The line is used to mow both wet or dry grass, for small trees, level the surface of lawns, and so on. But only quality brush cutter blades are suitable for thick shrubs and for brambles.
A sharp blade can easily deal with both thick high grass and a small shrub. The speed and quality of the cut directly depend on the design of the blade. It can have two, three or four vanes. It is clear that the more vanes, the more efficient and faster the brush cutter is.
If you have a difficult task to remove a shrub, young trees, then install not just a regular blade but a grass cutting blade with chainsaw teeth. Such a blade, turning very quickly, without effort will cut the bushes and trees.
It is not difficult to choose the right configuration of the blade – there is a wide choice. But keep in mind that the diameter of a blade is of great importance. The more difficult your task is, the more should be the diameter of the blade. If useful plants grow next to grass you want to get rid of, choose a blade of a smaller diameter that won’t damage them when mowing.
Be sure to clarify the technical characteristics of your mower, whether it is possible to install a knife or a blade on it. In most cases, only a drum with the line can be installed on the curved barbell since the installation of a knife and thus a heavy load can damage the engine.
If the blade became dull, do not save money and buy a quality carbide blade. If you sharpen the blade yourself, it can bend and the alignment may get disturbed, which is fraught with injuries or an increase in the vibration during work. After half an hour of work with such a blade, you will be very tired.
How to choose the best types of brush cutter blade
Brush cutters mow the vegetation with either a fishing line or blades. In the former case, the functionality of the cutter is limited to mowing soft grass of medium and low height as plant residues are wound onto a flexible shaft or stick to a spool. With the installation of the blade, it is possible to cut off stiffer stems and young bushes.
Types and Applications of Cutter Blades
There are the following types of brush cutter blades:
- As for to the material of the blade, there are metal and plastic knives. The choice is often limited not so much to the desire of the user as to the power of the drive – the metal knives are heavier, while the trimmer’s shaft completed with it is slower at gain momentum, which adversely affects the engine’s longevity. At the same time, the cutting ability and durability of steel knives are much higher than those of plastic knives.
- As for the cutting edges, they differ in a significant variety and can have four or more vanes, be one-and multi-high, as well as solid or with technological holes.
- As for the shape of the knife itself, which can have a continuous disk blade, and can be made in the form of several blades with the same distance between them.
The choice of the size and design of the knife for the cutter is made depending on the tasks, the type of rod, and engine power. If the rod of the brush cutter is curved in the shape of the J letter, then the steel knife is undesirable because when in contact with a massive obstacle, for example, a stone, the cutter will be sharply thrown back, towards the mower. Then even a high restrictive casing will not save you from the injury. Cutters with a straight rod have a bigger rebound distance.
Plastic blades for brush cutters, although less durable, but quite cope with the tasks of cutting most types of grass. In addition, their increased elasticity does not create additional loads on the flexible shafts of electric trimmers.
The configuration of the cutting edges determines the quality of the cut. For blackberries, hard grasses, dead wood, stiff shoots, disk knives with the maximum number of teeth are preferable. Then, regardless of the speed of rotation of the flexible shaft, the cut will be clean and even. The inertia of the perforated blades is much less than of solid ones, and this is not particularly reflected in the tool life, given that the tool is made of high-quality steel.
What brush cutter blade is better?
When the possibilities of fishing line are not enough, you should think about replacing it with a steel or plastic blade. If a replacement knife is included with the brush cutter, there is no problem – the cutting tool is replaced in accordance with the instructions for using the trimmer. But this is not always the case.
To clarify the suitability of installing the knife on a current electric trimmer (there will be no such problems with petrol-run cutters), according to the actual number of revolutions of the flexible shaft. If, when replacing the bobbin from the line to the knife, the engine gets the set number of revolutions per second or less, a replacement is possible, otherwise, the engine will overheat excessively, and the trimmer reducer will quickly fail.
Metal disk blades
Typically, several such knives are included with the professional trimmer but you can also buy them separately by measuring the outer diameter of the blade and the configuration of the hole. For example, disc blades from Stihl and Husqvarna are interchangeable. Blades differ in the number of teeth, height (they can be multi-high), and also the continuity of the blade. Such blades are most often installed on brush cutters from Stihl and AL-KO, equipped with a straight bar. They are good at coping with old shoots and long stems, but when working with young grass, it is often observed that the scraped mass adheres to the inner surface of the protective casing.
Brush cutters with a perforated blade, in comparison with a solid one, are faster at gaining momentum. The lack of disk knives is an increased moment of inertia, so the starting power of the drive increases. On cheap designs and with frequent stops in operation, this leads to engine overheating and adversely affects its durability.
Two-teeth and three-teeth blades
These knives are used by the Renegade brand. The moment of inertia of Renegade brush saw blades is minimal and practically does not affect the operability of the drive. The convenience of operating such a design is that separate replacement of each of the teeth is permissible. In trimmers of these designs, the bar is curved in the form of the J letter. Two-teeth blades work steadily on a uniform mowing mass. They are good at discarding the cut off to the side, do not allow the sticking or winding of the remains on the shaft of the rod.
Three-teeth clearing saw vs brush cutter with two-teeth blades are quite competitive in terms of their capabilities, but the thickness of the blade should not be less than 2 mm. At the same time, forged knives are more durable than stamped ones. It is easy to distinguish them – the stamped blades have clearly discernible marks from the cutting punch with the presence of characteristic zones of cleavage and shearing, which is not forged.
This is a nozzle made of three blade knives, each blade being fixed at an angle of 120 degrees relative to the other. The advantage of this design is that each blade can be adjusted individually. As a result, when mowing a site with different types of vegetation (grass, weeds, dead wood), the quality of mowing will be approximately the same. In addition, since the interval between grass mowing by each blade is shortened, the discard of grass will occur more intensively. According to weed eater blade reviews, the head of the blade is compatible with many standard sizes of electric trimmers, it has a low self-weight but requires periodic adjustment of the blades, which are fixed to the base with ordinary screws.