Rolling bearings: effective protection against electroerosion

June 21. 2016

Rolling bearings: effective protection against electroerosion

Innovative lubricant design ensures better conductivity

The undesirable passage of an electric current and spontaneous discharge can cause severe damage in electric motor rolling bearings. It is with a view to these applications that Klüber Lubrication has developed the new, electroconductive Klüberlectric BQ 72-72. Due to an innovative lubricant design involving dissolved chemical additives, bearings run smoothly and the grease's conductivity is considerably increased to attain specific electrical resistance characteristics resembling those of semiconductors. Furthermore, Klüberlectric BQ 72-72 reliably protects bearings against wear, which contributes to longer maintenance intervals and service lives.


"It is in particular the increasing use of frequency converters for continuous drive speed adjustment that leads to parasitic high-frequency bearing currents, which may damage bearings and reduce their service life considerably," explains Karl Dieter Schuster, Manager Application Engineering at Klüber Lubrication. "Due to the electroconductive additives contained, Klüberlectric BQ 72-72 enables the removal of bearing currents at variable speeds and temperatures. This helps to extend bearing life."


In rolling bearings, currents passing through them can provoke considerable damage to the inner and outer ring as well as the rolling elements. Additionally, there is a risk that the lubricant might be damaged and its performance impaired by the energetic impact. The innovative lubricant additives used in Klüberlectric BQ 72-72 not only contribute to better conductivity, but they also protect the components against wear for a longer bearing life. This was proven by positive results of bench tests and subsequent tribological component and used lubricant analyses.


About Klüber Lubrication

Klüber Lubrication is one of the world's leading manufacturers of speciality lubricants, offering high-end tribological solutions to virtually all industries and markets worldwide. Most products are developed and made to specific customer requirements. During its more than 80 years of existence, Klüber Lubrication has provided high-quality lubricants, thorough consultation and extensive services, which has earned it an excellent reputation in the market. The company holds all common industrial certifications and operates a testing section hardly rivalled in the lubricants industry.

Klüber Lubrication, set up as a retail company for mineral oil products in Munich in 1929, is today part of Freudenberg Chemical Specialities SE & Co. KG, a Business Group of the Freudenberg Group, Weinheim. Klüber Lubrication has about 2.000 employees in more than 30 countries.


About Freudenberg Chemical Specialities

Freudenberg Chemical Specialities entwickelt, produziert und vertreibt chemische Spezialitäten. Um nah an seinen Kunden zu sein, ist das Unternehmen mit seinen fünf Marken Klüber Lubrication, Chem-Trend, OKS, SurTec und Capol weltweit am Markt präsent. Freudenberg Chemical Specialities ist einer der weltweit führenden Hersteller von Spezialschmierstoffen, Trennmitteln, chemotechnischen Wartungsprodukten und Lösungen für die Oberflächen- und Galvanotechnik. Mit Hauptsitz in München, Deutschland, ist das Unternehmen in rund 40 Ländern mit eigenen Gesellschaften vertreten. Im Jahr 2015 beschäftigte die Geschäftsgruppe etwa 3.300 Mitarbeiter und erwirtschaftete einen Umsatz von rund 960 Millionen Euro.


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