Product category:
Bearings, lubrication, oil and filters
News Release from: Schaeffler (UK) | Subject: Cronitect
Edited by the Processingtalk Editorial
Team on 26 July 2007
New bearing coatings resist corrosion in
liquids
A high-grade martensitic steel has been developed for rolling bearings, offering very high hardness characteristics, as well as maximum corrosion resistance against aggressive media
A new high-grade martensitic hardening steel has been developed for rolling bearings, which offers maximum corrosion resistance under extreme conditions, for example, in dry running applications or when the bearings are in contact with aggressive media such as water, acids and cleaning agents Based on the consistent refinement of high-grade NIROSteels, the new Schaeffler Cronitect martensitic hardening steel achieves a very high hardness through its unique chemical composition, in combination with a new thermo-chemical surface layer treatment process
This article was originally published on Processingtalk on 15 Aug 2008 at 8.00am (UK)
Related stories
Precision bearings keep hydraulic systems running
Hydraulic drives and pumps require precision bearings and seals that are reliable, efficient and able to withstand the most demanding operating conditions, says Dr Steve Lacey of Schaeffler UK
Hand-held condition monitoring system improved
The latest Schaeffler handheld vibration monitoring and balancing device, FAG Detector III, makes condition monitoring easier and more accessible for engineers of all skill levels
Cronitect is therefore able to withstand extreme conditions, including salt spray testing in accordance with DIN 50021 SS without any problems, even after 600 hours.
The Cronitect resistance to corrosion is many times better than that of conventional NIROSteels.
Rolling bearings that use Cronitect come in either a sealed or non-sealed version.
Further reading
Monorail guidance systems reference guide
Schaeffler UK has published a free reference guide to its range of monorail guidance systems and accessories, including linear recirculating roller bearing and ball bearing type guideway assemblies
Autobalancer improves angle grinder safety
The Schaeffler Autobalancer improves safety on angle grinders by cutting vibration by more than 50%, improving operator handling and safety, whilst reducing grinding disc wear
Bearings for high load / low speed applications
The JK0S range of integral tapered roller bearings are ideally suited to applications in which loads are very high but speeds comparatively low, such as pulleys, crane wheels and cable rollers
The name Cronitect is derived from the chemical composition of the material and from its special heat treatment process.
The 'tect' suffix is found in other Schaeffler coating products and refers to the excellent corrosion protection of the material.
Schaeffler recently opened a new development centre for the surface coating of components at its headquarters in Herzogenaurach, Germany.
The new centre offers opportunities to develop new processes and combinations of unique materials and coatings technologies.
The opening of the new centre represents a further expansion of the company R+D activities.
Mrs Maria-Elisabeth Schaeffler, Partner of INA-Holding Schaeffler, emphasised the outstanding importance of R+D for Schaeffler, particularly with regard to innovation: "By opening the new Surface Technology Centre, our group of companies is intensifying its commitment to the future, particularly in nanotechnology, and is expanding its expertise in rapidly converting research results into innovative and efficient products".
Schaeffler is a leader in the area of innovative surface and coating technology.
The functionality of surfaces for a range of applications is optimised using special manufacturing and treatment processes.
Examples are wear resistance, sliding characteristics, shine or appearance, electrical and thermal conductivity, as well as corrosion protection.
Under its established brands Corrotect and Triondur, Schaeffler offers a successful range of coated components.
The importance of coating technology will continue to increase due to growing product requirements in industry and vehicle manufacturing.
The Surface Technology Centre now provides development engineers at Schaeffler with facilities and extra capacity, which open up new possibilities, particularly for combining different processes and materials.
Tribological coating systems (coating systems that are optimised for friction and are wear-resistant) can be developed and implemented using the PVD/PACVD development facility.
The coating material is either in the form of a solid (Physical Vapour Deposition) or in the form of a gas (Plasma Assisted Chemical Vapour Deposition) and is vaporised in a vacuum.
In contrast to conventional coating methods, it is possible to produce unique compositions of different materials and coatings with this environmentally friendly vacuum process.
There is also an electroplating development facility that is used for developing corrosion protection coatings that are environmentally friendly.
For example, part of the focus is now on developing new coatings that are hexavalent chromium-free (Cr-VI) and that comply with the stringent requirements of the new EU directive on end-of-life vehicles.
Both development facilities also enable cost-oriented, function-oriented combinations of different vapour deposition processes and coating systems.
The Surface Technology Centre, in combination with the Schaeffler R+D facilities, will enable the Group to rapidly implement customised, nanotechnology-based solutions for its customers.
For more information on the Schaeffler range of corrosion-resistant coatings for bearings, please visit the website, or use the Processingtalk Reader Response Service. Request a free brochure from Schaeffler (UK) ...
• Schaeffler (UK): contact details and other news
• Email this article to a colleague
• Register for the free Processingtalk email newsletter
• Processingtalk Home Page
