Petrol-powered Trimmer support

A sharp grass blade gives cleaner cuts, improves cutting performance and reduces strain on the engine.

If the blade becomes dull, your brushcutter has to work harder and the cutting results may become uneven. Regular sharpening helps maintain efficiency and extends the life of the blade.

Quick answer

Sharpen the grass blade if you notice:

• Poor cutting performance

• Torn or uneven grass

• Increased effort when cutting

• More engine load than usual

A sharp, balanced blade provides cleaner cuts and smoother operation.

Watch: How to sharpen a grass blade

Safety first:

• Wear protective gloves

• Stop the engine

• Remove the battery (battery models) or disconnect the spark plug (petrol models)

• Secure the brushcutter on a stable surface

What you’ll need:

• Single-cut flat file

• Protective gloves

• Clean cloth

Step-by-step: sharpen the grass blade

Inspect the blade

Before sharpening, check the entire blade for:

• Cracks

• Bent sections

• Missing pieces

• Excessive wear

Do not sharpen a damaged blade. Replace it instead.

Sharpen each cutting edge

Use a single-cut flat file.

• File in smooth, straight strokes

• Follow the original bevel on the blade

• Remove only the amount of material needed to restore the cutting edge

Rotate the blade

Turn the blade regularly as you work.

This helps you sharpen each cutting edge evenly.

Keep the blade balanced

Sharpen every cutting edge equally.

Removing more material from one side than the other can create an unbalanced blade, leading to vibration and poor performance.

Clean the blade

Remove any filings and debris before reinstalling the blade.

Check that the cutting edges are smooth and even.

Never use a damaged blade

Replace the blade immediately if it is:

• Cracked

• Bent

• Twisted

• Missing material

Never attempt to straighten or repair a damaged blade.

When should you sharpen the blade?

Sharpen the blade whenever:

• Cutting performance decreases

• Grass appears torn rather than cleanly cut

• You notice increased vibration caused by an uneven edge

• The blade becomes visibly dull

Regular inspection helps maintain efficient cutting and reduces unnecessary engine load.