Close this search box.

All about bearings





This article (based on ISO 15243) is all about electro-erosion – but what is it? Electro-erosion is understood to be a local structural change and

Keep reading »


Have you ever heard of corrosion? Corrosion is basically divided into two main forms according to ISO 15243: Corrosion by moisture and fretting corrosion. Fretting

Keep reading »

Plastic deformation

You may have already learned interesting facts about damage types such as fatigue damage or wear in our other articles. This article concerns another type

Keep reading »


Rolling bearings, like other mechanical components, encounter problems such as wear. Wear describes the progressive removal of material from surfaces and is caused by two

Keep reading »

Fatigue damage

If a rolling bearing “packs up” after some time despite correct bearing selection, lubrication and handling, it is very likely to be fatigue damage. Fatigue

Keep reading »


Rolling bearings can be found in almost all devices, machines or vehicles in which something rotates. Everyone encounters rolling bearings every day without even noticing. From the electric toothbrush to the car to the wind turbine – all these applications require rolling bearings.  

And because rolling bearings are so important, there are many areas in which knowledge about them is necessary. Whether in training, at university or at work, knowledge about rolling bearings can be essential everywhere. And it is precisely this knowledge that this platform – – provides! 

If you have come across this website while searching for information about rolling bearings, you may be wondering: What is anyway? is designed as a learning platform on the subject of rolling bearings. Here you will find articles on a wide variety of topics, ranging from basic questions such as “What is a rolling bearing?” to the presentation of rolling bearing types and technical aspects such as service life calculation. If you want to learn something about rolling bearings, you will get your money’s worth on – no matter how much previous knowledge you have! 

If you want to put your newly acquired knowledge of rolling bearings to the test, you can do so easily with the help of the exercises. Don’t worry – we will of course also provide you with the correct solutions, so you are well prepared for the next exam.  

How do we know all this? was created by NTN – one of the world’s largest rolling bearing manufacturers.  NTN was founded in Japan in 1918, more than 100 years ago. NTN develops, produces and sells products for the automotive, industrial and aerospace sectors. With over 23,000 employees, 16 research centres and 76 production sites, we are true experts in this field!  

About NTN

Wherever movement is implemented in machines and systems, bearings or guides are needed. These are the core products of NTN Corporation: For over 100 years, the company has been developing and manufacturing high-precision products for classic applications as well as for extreme operating conditions. Today, NTN is one of the world market leaders for precision components and systems in drive technology. 

Automobiles, aircraft and rail vehicles, agricultural and construction machinery, wind turbines and a wide range of industrial solutions: Wherever movement is required, NTN precision products such as bearings, constant velocity joints or linear technology ensure the reliable transmission of rotation or linear movement. Precision, friction reduction and energy efficiency are core aspects of NTN products. 

NTN designs, develops and manufactures a broad product portfolio with 23,000 employees in 33 countries. The NTN and SNR brands set standards with their high quality in the OEM market as well as in the spare parts market. NTN was the first bearing manufacturer worldwide to be certified according to the ISO 9001 standard. Since then, quality has been part of the company’s DNA.  

More information about NTN is available here 

SNR Wälzlager GmbH creates the information for this website with great care and endeavors to ensure that it is up-to-date, correct and complete. SNR Wälzlager GmbH assumes no liability and is not liable for any material or immaterial damage caused by the use of the service, unless it can be proven that it was caused by intent or gross negligence.