Uses of bearings

All seals listed in the table are examples of contact seals, but are also external seals. In the case of external seals, the shaft should be ground free of twists in the contact area of the seal in order to prevent lubricant from being ejected from the bearing.

Nothing works without lubrication: Every bearing runs with grease or oil lubrication, which is the basic prerequisite for avoiding metallic contact of the bearing components,

Would you like to learn more about rolling bearings? Then you’ve come to the right place. But let’s start with a short explanation: A rolling bearing is a machine component that is used in various applications. Through the rolling bearing, a movable connection of two components (shaft and housing) can be created, whereby load transmission is made possible with minimal friction. The term “rolling bearing” is the umbrella term for bearings in which rolling elements perform rolling motion and transmit a load between two opposing surfaces. The main components of a rolling bearing are the inner ring, outer ring, cage and rolling elements. Rolling elements can come in different shapes.

If you have read our article on rolling bearing basics, you probably already know that rolling bearings can basically be divided into two types –

Ball bearingexamples

Rolling bearings are machine components that are used in many applications Rolling bearings enable load transfer with minimal friction In rolling bearings, the rolling elements perform the rolling motion Rolling bearings are installed in almost all areas where something rotates Rolling bearings can basically be divided into two types: ball bearings and roller bearings

Materials and manufacturing Have you already had a look at our chapter on structure and function? Maybe you asked yourself what rolling bearings are actually

Characteristics of deep groove ball bearings In its current form, the deep groove ball bearing has existed – subject to some optimisation – for about

Other industrial sectors in which rolling bearings are used are, for example, robotics and the food industry. In the former, they are in demand in the form of crossed roller bearings for precision or reduction gears for robots and in absolute sensor systems. Bearings in the food industry, on the other hand, are subject to stringent demands. Above all, they must meet the relevant health requirements so that food quality can be maintained. For this reason, a solid lubricant – and not grease or oil as is usually the case – is used here. Rolling bearings are also indispensable in industrial solutions, machine tools, textile machines, material handling, cement production and the steel industry.

The most important feature of non-contact seals is that in this variant there is a small gap, or labyrinth, between the seal and the rotating part. Seals of this type are suitable for high-speed applications as there is no high seal friction. In addition, oil or grease is usually applied to any remaining gaps to provide improved sealing capability.

Rolling bearings are machine components that are used in many applications Rolling bearings enable load transfer with minimal friction In rolling bearings, the rolling elements perform the rolling motion Rolling bearings are installed in almost all areas where something rotates Rolling bearings can basically be divided into two types: ball bearings and roller bearings

The origins of rolling bearings Did you know that the precursors of rolling bearings already played an important role very early on? For example, at

Mobility represents a diverse field of application: Rolling bearings are required in aerospace technology and the automotive market, among others. For example, they are used in aircraft engines of Airbus and Boeing planes; and in the turbines and rotors of helicopters. In addition, rolling bearings are installed in turbine pumps and satellites. In the aviation and automotive sectors, they can also be found in the chassis as wheel bearings or in gearboxes. Last but not least, rolling bearings are suitable for use in (hybrid and electric) car engines or as clutch bearings. Other areas of application are the bicycle industry and railway technology as well as agricultural and construction machinery.

Interference fit, transition fit, clearance fit. You should know and be able to define these three types of fit after reading this article. But before

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.

Applicationof bearings in real life

If you have read our article on rolling bearing basics, you probably already know that rolling bearings can basically be divided into two types –

In general, lubrication (oil or grease) between the contact point of the sealing lip and the inner or outer ring of the bearing is indispensable. In the case of oil lubrication, suitable sealing concepts are required that prevent oil leakage during operation. In addition, the most important seal designs, their properties and other criteria for choosing the right seal can be found in the following tables.

Damn, bearing damage! If you consider that rolling bearings are exposed to continuous pressure and shear stress, this is nothing unusual to begin with. What

Contact seals are seals with a moulded sealing lip made of synthetic rubber that seals against the shaft, housing, inner ring or outer ring. The rubber is vulcanised onto a sheet metal plate. The big advantage of contact seals compared to non-contact seals is their sealing capacity, which is significantly greater. Nevertheless, aspects such as the frictional torque and the temperature increase are also considerably higher with contact seals. Because the sealing lip of the contact seals rubs against the shaft, the permissible circumferential speed depends on the seal type. In addition, the sealing lip must be lightly pre-greased before assembly so that it does not run dry or wear out during the first few minutes of use.

Bearing applicationin industry

Ball and roller bearings can be further subdivided into different types of rolling bearings. Here at wälzlagerwissen.de you will find relevant information not only on these numerous types, but also on everything else worth knowing about rolling bearings!

Types of bearings and their applications ppt

During the design of a bearing assembly, the topic of sealing will always accompany you. In the following material, we will cover both integrated and external sealing concepts. Both are used to prevent lubricant from escaping and to prevent contaminants (such as dust and water) from entering the rolling bearing.

Rolling bearings can be divided into two types. In addition to ball bearings, which are probably the better-known rolling bearings, roller bearings are another type. Today, it is possible to manufacture rolling bearings in various sizes and with a wide variety of materials. As a general rule, the dimensions are standardised, but there are also special bearings tailored to specific applications.

There are manufacturers who have specialised in producing different sealing concepts. This means that there are seals made of various materials (including metal and plastic) and in a wide range of variants that have individual properties in terms of thermal variability and sealing performance.

Types of bearings and their applications PDF

The functions of the rolling bearing are very important, as they are installed in all areas where something rotates. The wide range of uses extends from large wind turbines to small electric toothbrushes – rolling bearings are needed in a wide variety of applications.

The integrated seals can be divided into different types, some of which are defined in more detail in this section. All seals listed below are used for dust protection and sealing on both sides. The main integrated seals of rolling bearing manufacturer NTN are the seals ZZ, LLB, LLU and LLH (with low frictional torque).

All contact seals should have a relief hole to ensure pressure equalisation between the bearing and the bearing environment at all times. This must be placed in such a way that there is no excess pressure in the housing that could result in lubricant leakage. The choice of relief hole should take into account the mounting position of the drive unit to prevent lubricant leakage. During the painting process, it must be ensured that the relief hole is not closed unintentionally. With regard to the radial shaft seal, the permissible circumferential speed for the seal lip should be observed. Furthermore, the installation direction of the rotary shaft seal determines its function. The rotary shaft seal can either prevent ingress of contaminants or the escape of lubricant.

Integrated seals are integrated into the rolling bearing and pressed into the inner or outer ring. Integrated seals are mainly used in deep groove ball bearings. External seals, on the other hand, must be planned during the design phase. They are used in bearing types where no integrated seal is provided (mainly in roller bearings) or if an integrated seal is not sufficient and the bearing still needs additional protection. The functions of integrated and external seals are identical.

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.

Ball bearinguses

While the gap seal is considered the simplest seal variant, the labyrinth seal can be considered the most important non-contact seal type. It offers maximum flexibility in manufacturing as well as a very good sealing performance and is also an inexpensive solution when choosing a seal. As is typical for these non-contact seals, labyrinth seals can be operated almost at the limiting speed of the rolling bearing, depending on the design. There are three main types of labyrinth seals, including an axial, a radial and a self-adjusting version. Self-adjusting labyrinth seals are used, for example, in bearing housings.

Types of bearings pdf

What is meant by “point and line contact”? You may have already heard that rolling bearings can be split into two types. The classification depends

Characteristics of bearing inserts The bearing insert, which in principle is constructed like a deep groove ball bearing, has a spherical outer ring surface. The

As you can see, rolling bearings fulfil a central function in numerous industries and without rolling bearings many things could not be driven or moved efficiently. Rolling bearings often accompany us in everyday life without us noticing, so it’s likely that you will also have to deal with rolling bearings in your professional life.

Seals are to prevent lubricant from escaping from the rolling bearing Seals should prevent ingress of contaminants When choosing the seal, aspects such as the type of lubricant and the circumferential speed of the bearing rings must be taken into account There are two seal variants: Integrated and external seals The external seals can be divided into non-contact seals and contact seals Non-contact seals are suitable for high-speed applications Contact seals have a sealing lip made of rubber and have greater sealing capacity as well as a higher frictional torque

Generally speaking, a bearing is only as good as its environment. Who can perform at their best if they don’t feel comfortable in their surroundings?

Components of rolling bearings The basics of rolling bearing technology include the structure and function of rolling bearings. To get you started slowly, you will

Seals are to prevent lubricant from escaping from the rolling bearing Seals should prevent ingress of contaminants When choosing the seal, aspects such as the type of lubricant and the circumferential speed of the bearing rings must be taken into account There are two seal variants: Integrated and external seals The external seals can be divided into non-contact seals and contact seals Non-contact seals are suitable for high-speed applications Contact seals have a sealing lip made of rubber and have greater sealing capacity as well as a higher frictional torque

As previously mentioned, rolling bearings are also indispensable in the wind energy sector. In this innovative sector, they are used, among other things, as rotor, gearbox and generator bearings. The bearings used here are primarily roller bearings such as spherical or cylindrical roller bearings.

Certain factors should be taken into account when choosing a seal. These include the type of lubricant, the circumferential speed at the seal lip, fitting errors of the shaft, spatial limitations, the seal friction and the associated temperature increase. The seal material also plays an important role in the choice of seal. Of course, the costs incurred must also be considered.

Unlike integrated seals, external seals are not integrated into the rolling bearing and must be added separately. They can be divided into two types, namely non-contact seals and contact seals.