Robot mower blade wear: keep a condition record, not just a date

A calendar reminder can prompt a blade check, but it cannot show the present condition of the cutting assembly. Build a small record around what you observe, the exact mower and the maker's replacement instructions.

Husqvarna gives typical replacement intervals in its Automower blade guidance: main disc blades typically last 3 to 6 weeks and EdgeCut disc blades 9 to 12 weeks (page dated 24 July 2026). These are the manufacturer's ranges for its own products. Your lawn, season and cutting hours will change how quickly blades wear, so judge by the condition of the blades.

Record the symptom before changing settings

Husqvarna UK: when and how to replace Automower blades identifies frayed or whitened grass tips and visible blade wear or damage among reasons to consider replacement. It also describes several factors affecting life, including mowing use, ground conditions and contact with obstacles. These are manufacturer observations for its range, not proof that every uneven patch comes from a blunt blade.

Photograph the result on the lawn and note when it began. If there is damage, abnormal noise or an unresolved fault, stop the mower as instructed and seek support. Do not keep it running to collect more evidence.

Match the whole replacement arrangement

Find the model's correct blade type, screw specification and procedure. Husqvarna's guidance says to use its original blades and screws, replace the screws with the blades and avoid mixing old and new or different blade types. Apply your own maker's instructions rather than transferring that procedure across unrelated designs.

Ask whether the mower has more than one cutting assembly and how each is identified. A packet labelled compatible with robot mowers is not enough information to establish suitability.

Plan safe access

Before handling the mower, follow its shutdown and isolation instructions and the stated protective-equipment requirements. If you cannot identify the approved procedure or lack the necessary tools, arrange dealer servicing.

Do not reach under an operating mower, defeat a safety feature or assume a parked machine cannot restart. Keep children and other people clear of the maintenance area.

Make the record useful next time

After completed work, record the date, operating-hours reading if available, part identity, work carried out and any professional finding. Use the maker's checks before returning to the normal schedule.

If the result is still poor, retain the before-and-after observations for support. A fresh blade set does not establish that height, installation, grass conditions or the rest of the machine are correct.

Use a simple line in the maintenance log: observed condition, approved action, parts fitted, checks completed and next inspection. Keep an unexpected stone strike or other incident as a separate entry so it is not lost behind a routine replacement date.

This approach makes the schedule a reminder to inspect rather than a promise of blade life. It also helps you avoid replacing parts repeatedly while leaving an unrelated fault unexplained.

FAQs

Should I replace robot mower blades only on a fixed timetable?

Use the maker’s condition guidance as well as a reminder. Husqvarna identifies wear indicators and several factors affecting blade life, so a date alone is incomplete evidence. Husqvarna UK: when and how to replace Automower blades

Can I reuse the old blade screws on an Automower?

Husqvarna’s reviewed guidance says to replace screws when changing blades. Use the correct parts and exact-model instructions. Husqvarna UK: when and how to replace Automower blades

Should pivoting Automower blades be rigid when tightened?

Husqvarna says its blades should pivot freely when correctly installed. Follow the supported assembly procedure; do not treat that statement as a torque instruction for another design. Husqvarna UK: when and how to replace Automower blades