FREE BALANCING CALCULATORS

These calculators are free to use. No signup, no email address, nothing to install. One sizes a balance tolerance to ISO 1940, the other works out engine bobweight from component masses.

  • Balance Tolerance Calculator

    Calculates permissible residual unbalance per ISO 1940 from rotor mass, balance grade, service speed, and correction radius.

  • Bobweight Calculator

    Calculates engine bobweight from component masses, with a reference table of bobweight percentages for common engine families.

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