For best sharpening directions for the type of trimmer that you have, you’d need to check the instructions that came with the trimmer. There are professionals who can sharpen the tool for you, but here are some general guidelines for doing this yourself.
1. Wear gloves and goggles. Whether powered by gas, battery, or electricity, make sure that the trimmers will not start up while you are working on them (such as unplug it or remove its batteries).
2. For a thorough job, remove the bolts that hold the blades together. Clamp each blade in a vice before you work on it.
3. Use a soft cloth, or nylon bristle brush if needed, to remove any dirt on the blades.
4. Use a mill file to sharpen the cutting surfaces of the blades, moving always in one direction, forward toward the cutting edge (not back and forth), and at the recommended angle likely mentioned in the trimmer’s manual. Employ just enough strokes for the blade to become sharp—do not remove too much material. Make sure that all cutting surfaces are filed at the same angle and to the same amount. Only file the cutting edge, not any other parts that connect the teeth.
5. Turn the trimmer upside down and use a whetstone to remove any burrs underneath the cutting edges after you have used the flat file. Only use strokes in one direction, toward the tip of each tooth.
6. Wipe the blade with a soft cloth to remove any remaining debris.
7. Spray the teeth with corrosion protection, such as resin solvent for cleaning/lubricating blades (found in hardware stores).
8. Reattach the blades and test the trimmers carefully to make sure that they work properly.
For best sharpening directions for the type of trimmer that you have, you’d need to check the instructions that came with the trimmer. There are professionals who can sharpen the tool for you, but here are some general guidelines for doing this yourself.
1. Wear gloves and goggles. Whether powered by gas, battery, or electricity, make sure that the trimmers will not start up while you are working on them (such as unplug it or remove its batteries).
2. For a thorough job, remove the bolts that hold the blades together. Clamp each blade in a vice before you work on it.
3. Use a soft cloth, or nylon bristle brush if needed, to remove any dirt on the blades.
4. Use a mill file to sharpen the cutting surfaces of the blades, moving always in one direction, forward toward the cutting edge (not back and forth), and at the recommended angle likely mentioned in the trimmer’s manual. Employ just enough strokes for the blade to become sharp—do not remove too much material. Make sure that all cutting surfaces are filed at the same angle and to the same amount. Only file the cutting edge, not any other parts that connect the teeth.
5. Turn the trimmer upside down and use a whetstone to remove any burrs underneath the cutting edges after you have used the flat file. Only use strokes in one direction, toward the tip of each tooth.
6. Wipe the blade with a soft cloth to remove any remaining debris.
7. Spray the teeth with corrosion protection, such as resin solvent for cleaning/lubricating blades (found in hardware stores).
8. Reattach the blades and test the trimmers carefully to make sure that they work properly.
Hope this helps!