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The Schaeffler Group and Vitesco have completed their merger on 1st of October 2024 to become a Leading Motion Technology company.
With this invention, my father, Georg Schaeffler, laid the foundation for the rapid growth of our company. The cage-guided needle roller bearing is one of the most important innovations in our company's history as an automotive and industrial supplier.
Megatrends and future markets – what are the best investment strategies? What is the future of mobility? The Schaeffler Group is a leading technology company on the world’s markets.
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With the invention Dr.-Ing. E. h. Georg Schaeffler eliminated the serious disadvantages associated with the full complement needle roller bearings that had previously been used as standard: The long needle rollers tended to move in a transverse direction during rotation of the bearing (skewing), which would then cause the bearing to jam. Furthermore, a substantial amount of sliding friction was generated between the counter-rotating needle rollers. The development of the new needle cage overcame these disadvantages and permitted considerably higher speeds and less friction. This allowed engineers to substitute other bearing designs for cage-guided needle roller bearings and significantly improve the performance of their applications.
We work to bring about the technologies of the future and, in doing so, create the basis for our innovations to make tomorrow's worldwide mobility even better than it is today.
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Schaeffler products facilitate and shape mobility - as they have been doing for decades. We have also continued the development of our expertise from "basic" components to complete system solutions.
Needle roller bearings will continue to play a key role in the future. In e-mobility, needle roller bearings are vital for the function of numerous electrified transmissions. Needle roller and cage assemblies facilitate bearing arrangements with a minimal design envelope, since their section height only corresponds to the diameter of the needle rollers. In addition, they have a high load carrying capacity and are inexpensive compared with other bearing designs. KZK needle roller bearings (crank pin cages) are used, for example, in e-axles with a coaxial design. One application example is the Schaeffler e-axle drive, which has been produced for the Audi e-tron since 2018.
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70 years ago, Dr.-Ing. E. h. Georg Schaeffler revolutionized bearing technology. The first practical tests involving cage-guided needle roller bearings began in February 1950. The results were convincing – the components exhibited extremely low wear and friction. The application for a patent in September 1950 laid the foundation for the product's success. In February 1951, just one year after construction of the first prototype, the first volume production orders were obtained from automotive manufacturers, and use in industrial applications was to follow.
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In industry too, where lightweight robots are increasingly in demand, the use of needle bearings permits light and compact joint designs by means of downsizing. The needle bearings provide minimal variability and the highest level of safety. The most recent example is the angular contact needle roller bearing XZU from Schaeffler, which is used both as an articulated arm bearing in lightweight robots and cobots, and as the main bearing arrangement in the new RTWH precision gearbox, a ready-to-install reduction gear unit for robot joints.
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“The development of this very product is, in itself, an impressive example of what sets us apart: We have utilized all synergies in the cage-guided needle roller bearing, which will allow us to serve all relevant target markets with this innovative product and generate real customer benefits – in both the automotive and the industrial sector.”, says Georg F. W. Schaeffler, Family Shareholder and Chairman of the Supervisory Board.
The Schaeffler Group has been driving forward groundbreaking inventions and developments in the field of motion technology for over 75 years.
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What originally started life as an ingenious idea by Dr.-Ing. E. h. Georg Schaeffler, has been continuously developed by Schaeffler engineers over the course of 70 years, both in terms of performance and the variety of available types. Compared to a machined needle roller bearing from the 1950s, the operating life for bearings with the same dimensions has increased fifteenfold, and the static load carrying capacity has tripled. The power density, which has been enormously improved thanks to the needle roller and cage assembly, offers considerable downsizing potential for applications that are easier on energy and resources.
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In particular, needle roller bearings made an invaluable contribution to the development of small, high-performance, and affordable automobiles. “Without reliable needle roller bearings, modern automotive drives would still be inconceivable today,” says Matthias Zink, CEO Automotive Technologies at Schaeffler. The use of needle roller bearings in mechanical and plant engineering, construction and agricultural machinery, and in conveyor technology, was also being gradually introduced.
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The cage-guided needle roller bearing is one of Schaeffler’s most important innovations is now an indispensable part of bearing technology. 70 years ago, Dr.-Ing. E. h. Georg Schaeffler had the brilliant idea of equipping the needle roller bearing with a cage to guide the needle rollers. Since the patent was filed in 1950, these bearings have ensured the correct rotation in automotive and industrial applications and also play an extremely important role when it comes to future topics like collaborative robotics and electric mobility.
There has also been a steady increase in the variety of types: Today, the Schaeffler needle roller bearing portfolio comprises more than 15,000 variants to fulfill a wide variety of requirements. Since the patent application was filed 70 years ago, Schaeffler has sold a total of more than 100 billion needle roller bearings. The length of the wires used in the production of 60 billion needle roller bearings annually would be sufficient to wind around the earth's equator 18 times. Almost 170 million needle rollers are produced from this wire every day.