Answer:
Periodically replacing the blades helps maintain and improve cutting performance—and can even save energy.
For best results, always replace all blades and screws at the same time. This ensures proper balance during operation.
Why? Worn blades weigh less than new ones. Using a mix of old and new blades creates an imbalance, which can:
- Reduce cutting performance,
- Cause vibration or wobbling, and
- Lead to unusual rotating noises.