Major components such as turbine disks, impellers, etc., having a balance plane separation of 3% or less of the rotor’s bearing journal span may be static balanced in lieu of dynamic balancing.
(page 14)
Some photo of overhang balancing carried out at TNB REMACO Repair Centre, Klang:
CWP Impeller, Manjung
Hydro Turbine Runner, Tenom Pangi
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