New Machine from PMB Bobertag for Precise Laser Balancing of Small Rotating Components

Many rotating components such as the rotors of electric motors, small fans, microturbines and dental turbines are subjected to high stresses during operation at speeds of up to 500,000 rpm. Even the smallest imbalances caused by manufacturing tolerances or the pressing on of bearings generate vibrations and damaging bearing forces at high speeds.  

Now, PMB Bobertag, a developer of ultra-precision balancing systems located in Kaiserslautern, Germany, has come out with a new machine for balancing such small, highly sensitive components quickly, precisely and gently. Its new Caroba Balancer Laser can balance down to the microgram range in a process-safe, force-free and non-cutting way by targeted mass removal. 

Whether working with a component or an assembly, reliably good balancing even with the smallest permissible residual imbalances is particularly important, notes the company, and can improve noise generation and extend service life. 

In addition to balancing accuracy and process reliability, two points have become more important these days, says the company. The component must be balanced as gently as possible without any external mechanical forces, and under no circumstances should chips be allowed to enter already mounted bearings or electronics. The Caroba Balancer Laser meets both these requirements, says PMB, and can be customized with individually adaptable internals. 

It is designed to provide highly precise reproducible removal down to the smallest residual imbalances in the microgram range. In contrast to machining processes, only a fine laser dust is formed, which is extracted and filtered directly at the point of origin. The geometry of the mass correction is freely selectable, the removal can be adapted to complex workpieces allowing, for example, an unbalance correction between the blades of a fan. The measurement of the unbalance and the following correction run fully automatically. 

Retooling to different components can be done fast and flexibly. If the components or the production program changes, the system can be adapted by adjustments or by changing the bearing modules. For larger changes, the balancing core can be simply changed. For more info,