The main differences between dynamic balancing and static balancing tests of rollers lie in the number of correction planes, applicable conditions, and balancing precision.
Number of correction planes: Static balancing has only one correction plane, while dynamic balancing has two correction planes.
Applicable conditions: When the rotor's outer diameter D and length L satisfy D/L ≥ 5, static balancing is sufficient regardless of the operating speed; when L ≥ D and the operating speed is greater than 1000 rpm, dynamic balancing is required. But these are just general principles; rotors with special requirements must be considered on a case-by-case basis.
Balancing accuracy: The accuracy of dynamic balancing is higher than that of static balancing. Static balance may be qualified, but dynamic balance may not necessarily be qualified; however, if dynamic balance is qualified, then static balance must be qualified.