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A Quick Guide to Brush Cutter Blades

In this guide, you will learn about the different types of brush cutter blades as well as their advantages and disadvantages. This aims to inform and educate you about different types of blades that you can equip in your brush cutter to help you make a decision when buying a new one for your cutter.

Different Types of Brush Cutter Blades

Basically, there are four (4) types of brush cutter blades available in the market:

  1. Knife Blades
  2. Chisel Blades
  3. Smasher Blades
  4. Mulching Blades

Each of these blades has their distinct functions and characteristics. Let us take a closer look at each type, as well as their pros and cons, below.

Knife Blades

Knife blades are, by far, the most common type of metal blade. It is usually the standard attachment that comes with your brush cutter upon purchase. This type of blade is generally lasered or stamped from thin sheets of metal or steel. It has sharpened knife edges that cuts grass by slicing through it. It comes in various sizes and shapes, ranging from rectangular to rounded ones with small sharp teeth. But, the most common form of knife blade is a star-shaped metal blade that has three or more cutting edges.

Pros:

  • Affordable

    Because it made of stamped out thin metal sheets, the construction of knife blades require low costs. The materials used are affordable and easy-to-find, making the production easier and faster.
  • Effective in Cutting Grass and Weeds

    Mainly, it takes less effort to cut grass and weeds due to its metal construction. Its effectivity, however, depends on the design of the blade and the quality of the materials used in its construction. Nevertheless, knife blades are reliable and effective lawn care maintenance cutting blades.

Cons:

  • Easily Dulls

    Most of the knife blades in the market rely on their cutting edges to do the cutting. Because of this, the blades loses its sharpness faster. As a result, this type of blade requires frequent sharpening.
  • Easily Dents or Breaks

    Because it is mainly constructed from thin sheets of steel, the edges of a cutting blade easily dents, chips, or breaks when they hit an obstacle. But, of course, the outcome depends on the level of impact and the object it collided with.

    To counter this problem, most manufacturers construct knife blades with a sloping cutting edge, not to improve cutting efficiency, but to actually make the blade more resistant to breaking.

Chisel Blades

Chisel blades are circular metal blades with varying numbers of sharpened teeth around the perimeter. The teeth have a bent offset for blade clearance. They are either part of the blade or riveted to the disc.

This type of blade is usually constructed with tungsten tips and cuts through grass and weeds by chiseling or shaving their way through.

Pros:

  • Heavy Duty Cutting Blade

    Chisel blades are proven to be an ideal cutting blade for hard materials like woody weeds and wood.
  • Efficient Cutting Blade

    Since a chisel blade is comprised of numerous sharp teeth, cutting through even hard materials are a lot faster and easier.

Cons:

  • Expensive

    Chisel blades are more expensive due to their complex shape. The construction of this type of metal blade requires extra effort to bend, sharpen, and attach parts. And because production costs are higher, the actual product is more expensive as well.
  • Difficult to maintain

    Sharpening the blades may give you a hard time due to having numerous sharp teeth. In addition to that, it is possible for the teeth of the chisel blade to snap or shatter. When one of the teeth falls off, you cannot reattach it back to the blade.

 

Smasher Blades

Smasher blades are a type of cutting blade that bear no sharp edges. These are generally pivoting flail blades that are linked to metal blades or different types of chain. This type of blade solely relies on its thickness and weight with the help of centrifugal force to smash through grass.

Sadly, smasher blades are less used in the lawn care industry nowadays. Many of these blades are not even being sold anymore. Only a few varieties of smasher blades are available in the market now.

Pros:

  • Doesn’t Need Sharpening

    Unlike other types of cutting blades, smasher blades do not have sharp edges. Because of this, they don’t require sharpening to maintain the blades.
  • Works Well on Soft Materials

    Smasher blades are ideal to use in cutting soft materials such as grass and watery weed.

Cons:

  • Expensive

    Smasher blades are comprised of multiple parts. As a result, this type of blade is a lot harder to assemble and manufacture.
  • Short Life Expectancy

    Most smasher blades cannot sustain heavy duty application. The materials used cannot simply withstand extreme loads, resulting in the equipment’s shortened lifespan.

    In addition to that, they are not suitable to smash against hard or tough materials. When used on materials like wood or woody weeds, they will most likely break.
  • Requires High Powered Machines

    Because smasher blades generally have a heavy weight, they require to be attached on a high powered machine. If not, the equipment will not be able to bear the load and might result to overheating.

 

Mulching Blades

Mulching blades are constructed with bent sharp edges, which is ideal for shredding whilst cutting.  This type of blade is mainly used to pulp the material to be able to use it as mulch.

 

Pros:

  • Mulching Capability

    True to its name, a mulching blade is the best option for mulching trimmings. It is able to cut well and pulp the material.
  • Trimmings Do Not Stray

    Because the edges are bent longer, the trimmings do not fly around randomly. The blades are strategically constructed to lead the trimmings back to the ground.

Cons:

  • Dulls Easily

    Since mulching blades are often doing extra work, they are most likely to dull faster as well. The edges usually require routine sharpening to keep them in a good condition.

Hard to Maintain

Because of their unique bent design, they are a little bit difficult to sharpen. This poses a big problem especially since the edges dull quickly.


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