This list is intended to provide simple explanations for some of the more commonly used dynamic balancing terminology.
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- Dynamic Unbalance
- Static Unbalance
- Couple Unbalance
- Vertical Dynamic Balancing Machine
- Horizontal Dynamic Balancing Machine
- Soft Type Dynamic Balancing Machine
- Hard Type Dynamic Balancing Machine
- Dynamic Unbalance
- Balancing
- One-Plane Balancing
- Two-Plane Balancing
- Composite Unbalance
- Mass Eccentricity (Distance to Center-of-Gravity)
1．Dynamic Unbalance
Dynamic unbalance is the unbalance that occurs during rotation.
⇒ For more information, see Basic Information About Balancing Machines
2．Static Unbalance
Static unbalance is the vector synthesis of lateral unbalance. It is the unbalance that causes a rotor to rotate by gravity when placed on smooth rails.
⇒ For more information, see Basic Information About Balancing Machines
3．Couple Unbalance
Couple unbalance is the amount of unbalance remaining after correcting static unbalance of rotor. It consists of multiple unbalance vectors of equal magnitude, located laterally apart and oriented 180 degrees in opposite directions.
4．Vertical Dynamic Balancing Machine
Dynamic balancing machine that measures a rotor
VG
VG2
5．Horizontal Dynamic Balancing Machine
Dynamic balancing machine that measures a rotor
SGB
SGF
HGB
HGJ
6．Soft Type Dynamic Balancing Machine
Dynamic balancing machine using flexible bearing housings for measurements at rotational speeds (frequency) higher than the natural frequency of the unit which uses the bearings.
SGB
SGF
7．Hard Type Dynamic Balancing Machine
Dynamic balancing machine using rigid bearing housings for measurements at rotational speeds lower than the natural frequency of the unit which uses the bearings.
HGB
HGJ
8．Dynamic Unbalance
Dynamic unbalance refers to the center of gravity being out of alignment with the center of rotation.
⇒ For more information, see Basic Information About Balancing Machines
- e : Mass Eccentricity (distance [μm] to center of gravity)
- M : Mass of a Rotor (kg)
- R : Radius of a Rotor (mm)
- m : Mass of a Weight (g)
9．Balancing
Balancing is the process of reducing the amount of unbalance of a rotating object.
⇒ For more information, see Basic Information About Balancing Machines
- e : Mass Eccentricity (distance [μm] to center of gravity)
- M : Mass of a Rotor (kg)
- R : Radius of a Rotor (mm)
- m : Mass of a Weight (g)
10．One-Plane Balancing
Process of measuring dynamic unbalance in only one plane in order to measure static unbalance, which is one type of unbalance, or correct the unbalance, especially in thin rotors.
11．Two-Plane Balancing
Process of measuring dynamic unbalance in two planes to correct one type of dynamic unbalance often found longer rotors.
12．Composite Unbalance
Dynamic unbalance calculated by combining two lateral planes by vector synthesis.
13．Mass Eccentricity (distance to center of gravity)
Refers to center of rotation being out of alignment. The distance to which it is out of alignment is called the distance to the center of gravity.
⇒ For more information, see Basic Information About Balancing Machines
About Balancing Machines
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- Terminology