At a glance

Glossary

Our glossary provides you with a quick overview of important balancing technology terms.

This makes it easy for you to keep track of all technical terms and understand the context immediately.

Glossary of balancing technology

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Mass eccentricity
For a rigid rotor, the distance of the center of mass from the shaft axis.
Center of mass or center of gravity
The point in an axially and radially extended (rigid) rotor at which its inertia effect against linear displacements can be replaced by a point mass.
Mass centering (balance centering)
Determination of the main axis of inertia of a rotor; information is used in the subsequent machining of the bearing journals, centering or reference surfaces so that the subsequent axis of rotation is as close as possible to the main axis of inertia.
Multi-plane balancing
Processes that use more than two planes for balancing flexible rotors.
Exhibition level
Radial rotor plane for which the unbalance vector is determined.
Modal balancing
Method that uses the information about the bending eigenmodes in the vicinity of the respective critical speeds to balance elastic rotors.
Moment imbalance
Unbalance condition in which the central main axis of inertia intersects the shaft axis at the shear point; typically caused by two equally large unbalances that are 180 degrees opposite each other.
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