Introduction
A general introduction to balancing standards will be given in ISO 19499 (under preparation). For rotors in a
constant (rigid) state, only the resultant unbalance and the resultant moment unbalance (resultant couple
unbalance) are of interest, both together often expressed as dynamic unbalance.
The balancing machines available today enable unbalance to be reduced to low limits. However, it would be
uneconomical to reduce the unbalances to these limits. On the contrary, it is necessary to specify the balance
quality requirement for any balancing task.
Of similar importance is the verification of residual unbalances. For this verification, different balance errors
have to be taken into account. An improved procedure to handle errors of the balancing machine is described
in connection with ISO 1940-2.