How To Sharpen Brush Cutter Blades

Like any other bladed tool, brush cutters also require their share of periodic maintenance, which includes sharpening the blades. No matter how sharp and top-notch the blades are at the beginning, over time with regular use, they will certainly grow dull. And with such blades, you don’t cut grass – you tear them. So, here we are to the rescue with this article on how to sharpen your brush cutter blades in five easy steps!

Brush cutter blades

Before getting into the process, ensure safety first. Disconnect the power source completely and prepare a clutter-free, flat workstation well away from any sort of combustible component. For gas powered cutters, drain the fuel tank empty to avoid leaking and remove the spark plus wire to prevent accidental start-up. For electric cutters, remove the batteries. Wear proper protective gears, including gloves, boots, long pants, etc. Once all these are done, only then proceed to the steps.

The things you would need to sharpen brush cutter blades are:
  • Soft wire brush
  • Soap water
  • Clean rags
  • Lubricating oil
  • Any one of the following: Whetstones – medium and fine grain (soaked in water) OR a metal file

Sharpen brush cutter blades in 5 easy steps

Step 1:

Remove the blade attachment form the cutting head very carefully. Mark the bottom side of the blade for ease of reassembling.

Step 2:

Scrub off the entire blade with a soft wire brush, followed by cleaning it with soap water. This will remove all the debris and dirt before sharpening.

Step 3:

Dry and lubricate the blade after cleaning. Using a dry, clean rag, wipe the blade to get rid of all the moisture. Then apply some lubricating oil to the blade using a rag.

Step 4:

Place the cutting side on the edge of the bench with the angled part facing outward. Hold the medium grain whetstone on the surface of the angled part of the blade. Make sure that the angle of the stone and the blade edge is the same. Then, drag the stone across the blade using steady and even strokes until the desired sharpness has been reached. Repeat the process with the fine grain whetstone.

You can also do this step another way. Place a medium grain whetstone on the station and angle the blade on the stone at 45 degrees. Then, move the blade inward and outward with even strokes. Repeat the step with the fine grain stone.

For metal files, the process is very similar. This technique is best suited for blades with bent edges. Simply angle the file against the edge of the blade, followed by making upward and downward stokes alternately. Repeat on the other side of the blade as well.

Step 5:

Lastly, check the balance of the blade to make sure that one side is not heavier than another. For this, hang the blade at the center point. One side is dipping lower than the other, the blade is imbalanced. To restore stability, sharpen the dipped side some more and recheck. Once done, finish up up applying another coat of lubricating oil with a clean rag.

And voila! Your brush cutter blades are sharp! Check out the demo below to undertand the process better:

Did you find this article useful? How do you sharpen your brush cutter blades? Let us know in the comments!

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