Unbalance tolerance – Measurement Computing eZ-Balance rev.9.0 User Manual
Page 37
eZ-Balance
939093
Balance Toolkit 4-5
Unbalance Tolerance
Unbalance Tolerance Tab
This tab is used to calculate the acceptable amount [the tolerance] of residual unbalance.
The first step in making the calculation is to select the Balance Grade from the pull-down list.
The ISO balance grade standards are presented in the flowing table.
Grade Values and Associated Uses
ISO
Balance
Grade No.
Typically used for the following applications.
40.0
Car wheels and rims.
16.0
Auto drive shafts, crushing and agricultural equipment.
6.3
Process rotors, centrifuges, fans, flywheels, and pumps.
2.5
Turbines, blowers, machine tools, large and medium motors.
1.0
Jet engines, recorder drives, and grinding machines.
0.4
Armatures and shafts of precision grinding machines.
When a balance grade is selected, the tab displays a list of equipment normally associated with
that grade. This is indicated in both the preceding figure and table.
After entering the ISO Balance Grade, enter rotor weight and speed. The Upper Limit for Rigid
Frames and the Lower Limit for Flexible Frames will be displayed at the bottom of the window
whenever a value [Balance Grade, Rotor Speed, or Rotor Weight] is entered.