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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There are 14 names in this directory beginning with the letter B.

Balancing

Process during which the mass distribution of a rotor is checked and typically corrected so that the residual imbalances, the vibrations of the bearing journals, the bearing forces and/or bearing pedestal vibrations at operating speed or in the operating speed range are within specified limits.

Balancing bearing

For example, rolling bearings with reduced clearance to accommodate an engine rotor in a low-speed balancing machine.

Balancing machine

Machine that generates a measured value for the unbalance of a rotor mounted in it, which can be used to correct the mass distribution.

Balancing on reversal

Compensation of the unbalance of auxiliary parts and the unbalance effect due to fit clearance, radial and axial run-out between auxiliary parts and the rotor to be balanced in order to identify the actual rotor unbalance. The rotor is rotated in relation to the auxiliary part in successive measurements.

Balancing putty

Typically used to attach a test mass to a rotor.

Balancing quality

Possibility of dividing rigid rotors into classes; product of mass eccentricity and angular velocity at operating speed or path velocity of the center of mass, each in mm/s (see also ISO 21940-11).

Balancing run

cycle, consisting of a measuring run and associated unbalance correction.

Balancing speed

Speed at which the rotor is balanced.

Bearing journal

Part of the rotor that rotates in a bearing and is guided by it.

Bearing journal center point

Axial rotor plane in which a bearing force acts.

Belt drive

Mechanical drive of a balancing machine consisting of motor, pulleys, drive belt and belt tensioner. The diameters of the motor pulley and the drive diameter of the rotor should not be too similar in order to avoid the occurrence of apparent imbalances.

Bending mold

Characteristic bending line with which a rotor deforms at a critical speed.

Bending-critical speed

Speed at which maximum deflection of the rotor occurs and this is significantly greater than the movement of the bearing journals.

Bode diagram

When balancing, the course of the magnitude and angle of an oscillation at rotor speed or twice the rotor speed over the speed.