When one bent or broken blade on a double- or triple-rotor troweling machine is replaced _____ blades should be replaced.

When one bent or broken blade on a double- or triple-rotor troweling machine is replaced _____ blades should be replaced.

• A. All
• B. None
• C. Only the bent blade
• D. Only blades on the same rotor

Answer: (A)

Balanced blade sets are essential on multi-rotor trowels. If one blade is bent or broken and only that blade is replaced, the new blade will have a different weight and the rest of the blades will differ in wear, creating an imbalance. That imbalance leads to vibration, uneven finish, and extra stress on the motor, bearings, and drive system. Replacing all blades ensures the weight and wear are uniform across the rotor, promoting smooth operation, consistent cutting action, and longer equipment life. Replacing none or only the blades on one rotor would still leave mismatches that can cause problems, which is why replacing all blades is the best practice.

Balanced blade sets are essential on multi-rotor trowels. If one blade is bent or broken and only that blade is replaced, the new blade will have a different weight and the rest of the blades will differ in wear, creating an imbalance. That imbalance leads to vibration, uneven finish, and extra stress on the motor, bearings, and drive system. Replacing all blades ensures the weight and wear are uniform across the rotor, promoting smooth operation, consistent cutting action, and longer equipment life. Replacing none or only the blades on one rotor would still leave mismatches that can cause problems, which is why replacing all blades is the best practice.