Regularly replacing robot mower blades is one of the most important maintenance steps for a healthy lawn. Nevertheless, it is often underestimated. Dull or damaged robot mower blades lead to an untidy cut, brown grass tips, and increased strain on the robot mower.

In this article, you will learn how often you should replace robot mower blades, how to recognize dull blades, and how to replace them step by step.

Why should you regularly replace robot mower blades?

Unlike conventional lawnmowers, robot mowers work with small, rotating blades. These must be very sharp to cut the grass cleanly. Even slightly dull blades tear the grass blades.

• untidy lawn cut
• frayed and brown grass blades
• higher susceptibility to lawn diseases
• more wear and tear on the robot mower

Those who do not replace robot mower blades save money in the short term, but risk long-term damage to the lawn and the device.

How often should robot mower blades be replaced?

The question "How often to replace robot mower blades?" cannot be answered universally. However, a rule of thumb is:

Every 4 to 8 weeks, depending on usage and conditions.

These factors influence the replacement interval:

• Size of the lawn area
• Mowing frequency
• Soil condition (sand, soil, small stones)
• Moisture and weather
• Quality of the robot mower blades

For sandy soil or daily mowing, the robot mower blades should be replaced more frequently.

How to recognize dull robot mower blades?

Dull robot mower blades are not always immediately noticeable. Typical signs are:

• The lawn looks frayed instead of cleanly cut
• Grass blades have brown tips
• The robot mower sounds louder or more erratic
• The cutting pattern visibly deteriorates

At the latest, when these signs appear, you should replace the robot mower blades.

Replacing Robot Mower Blades – Step-by-Step Guide

1. Switch off and secure the robot mower

Switch off the robot mower completely and, if present, remove the safety key. Always wear gloves when replacing blades.

2. Carefully turn the robot mower over

Place the robot mower on a soft surface to avoid scratches.

3. Remove old robot mower blades

Carefully loosen the screws and remove all blades. Always replace the blades in sets, not individually.

4. Install new blades

Insert the new robot mower blades and, if possible, use new screws. Tighten them hand-tight – do not overtighten.

5. Check function

Set the robot mower upright again and check that all blades move freely before starting.

Original or compatible blades – which is better for replacement?

Both original robot mower blades and compatible robot mower blades can deliver good results. The manufacturer is not the decisive factor, but rather:

• exact fit
• high-quality material
• regular blade replacement

High-quality compatible blades often offer excellent value for money and are particularly suitable for frequent replacement.

Frequently Asked Questions about Replacing Robot Mower Blades (FAQ)