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How often to replace robot mower blades
| Maker | Guidance | Source |
|---|---|---|
| Husqvarna Automower | Main-disc blades typically 3 to 6 weeks; EdgeCut disc blades 9 to 12 weeks; replace the screw every time | Husqvarna support |
| Segway Navimow | Replace blades and screws every 80 working hours on the H2 and i2 LiDAR; app alerts at 70 and 80 hours | Navimow support |
| Mammotion Luba and Yuka | Flip at 50 hours, replace at 150 hours (tested on Zoysia grass) | Mammotion |
Signs it is time
- Frayed or whitened grass tips after mowing
- Visible wear, nicks or bends on the blades
- More noise or vibration (unbalanced or mixed blades)
What speeds wear
- Frequent mowing and large lawns
- Tough grass and fast spring growth
- Sandy soil and some fertilizers
- Stones, roots, toys and twigs
These intervals are from the makers for their original blades. We have no independent wear data for third-party blades, so watch the signs above.
FAQ
How often should I replace robot mower blades?
It depends on the mower and lawn. Husqvarna says main-disc blades typically last 3 to 6 weeks, Segway says every 80 working hours on some Navimow models, and Mammotion says flip at 50 hours and replace at 150 hours. Replace sooner if grass tips look frayed or whitened.
What are signs blades are dull?
Frayed or whitened grass tips after mowing, uneven cuts, and visible wear or damage on the blades (Husqvarna).
Does lawn type change wear?
Yes. Husqvarna lists mowing frequency, lawn size, grass type, seasonal growth, soil and fertilizer, and obstacles like stones and roots.
When should I stock up on blades?
Late winter, before the spring growth rush. Husqvarna also suggests a spring blade check because sappy spring grass can build up on blades.
Last updated October 28, 2026.