Press releases

Easy dismantling of screw connections – even after years of use

September 22. 2014

Easy dismantling of screw connections – even after years of use

The assembly grease STABURAGS NBU 30 PTM made by Klüber Lubrication has proven effective especially in applications where only a narrow range of friction ratings is permissible and where there is a strong influence of…

Munich, September 23rd, 2014 – Many of the large number of screws found in rail vehicles and their components have a function that is relevant for the vehicle's safety. The friction coefficients permitted in these applications are often required to lie within a narrow range: The standards DIN 25201 "Screw connections for rail vehicles" and VDI 2230 stipulate 0.09 < µ > 0.14.

"Our tried-and-tested assembly grease STABURAGS NBU 30 PTM meets all these requirements, as was confirmed by extensive tests with M 16x 100 – 8.8 screws on our specific test rig," explains Thomas Kamprath, Market Manager Rail at Klüber Lubrication. "For the attainment of the required preload force in a screw connection, the total friction coefficient is a decisive factor," says Kamprath. "Especially for connections that have to be dismantled for inspections, it is important that screws can be undone after long periods of operation. With STABURAGS NBU 30 PTM this is possible because of the product's good resistance to water and media."

These are characteristics of STABURAGS NBU 30 PTM that are particularly in demand in bogie applications. For use in brakes, the product has been approved by Knorr Bremse, the world market leader for railway brake systems. Several other well-known international companies, e.g. Deutsche Bahn, S.N.C.F., SBB, Siemens Mobility, Bombardier Transportation, Alstom Transportation or Stadler Rail also use STABURAGS NBU 30 PTM for screw lubrication.


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 test bay 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 Munich, was founded in 2004 as a new Business Group within the Freudenberg Group, Weinheim, Germany, a family-owned, diversified technology company with a history of more than 160 years. Freudenberg Chemical Specialities has a lean, market-oriented organisation with Management Board and Corporate Functions. Its objective is to promote innovation potentials in its field of activities and to expand world-wide market leadership in special lubricants and release agents. The Business Group includes five largely independent divisions which are active in more than 50 countries: Klüber Lubrication, Chem-Trend, SurTec, Capol and OKS.

Press contact
Klüber Lubrication München SE & Co. KG
Andreas Hasslinger, Marketing Communications
Geisenhausenerstr. 7
81379 München
Phone: +49 (0) 89 / 78 76-467

Michael Jurischka
Gotzkowskystr. 11
10555 Berlin
Phone: +49 (0) 30 / 28 44 95 95