Bearings are modern machinery and equipment is an important component. Its main function is to support the mechanical rotating body, reducing its coefficient of friction during movement, and to ensure the accuracy of its rotation.

According to the different nature of friction of moving parts, bearings Rolling and plain bearings can be divided into two categories. Wherein Rolling has been standardized, serialized, but compared with the sliding bearing its radial dimension, vibration and noise are large, the price is higher.


Rolling generally consists of an outer ring, inner ring, rolling elements and cage four parts, strictly speaking, by the outer ring, the inner ring, rolling elements, cage, seals, lubricants six pieces of composition. Mainly includes outer, inner ring, rolling elements can be given meaning-bearing. According to the shape of the rolling elements, bearing into ball bearings and roller bearings two categories.

Also Read: What are ball bearings and what is their purpose?

A bearing is a mechanical element which is used to support another moving element.

It is used to give free rotational motion to the shaft. It reduces the friction and heat.

Bearings should have following properties-

1.high compressive strength

2. High fatigue strength

3. High thermal conductivity

4. Low thermal expansion

There are numerous different kinds of bearings that are designed to handle the radial load, thrust load, or some combination of the two. Because different applications require bearings that are designed to handle a specific kind of load and different amounts of weight, the differences between types of bearings concern load type and ability to handle the weight.

Types Of Bearings-

  • Ball Bearings


Ball Bearings are extremely common because they can handle both radial and thrust loads, but can only handle a small amount of weight. They are found in a wide array of applications, such as roller blades and even hard drives, but are prone to deforming if they are overloaded.

Learn in detail about ball bearings and their purpose here- What are ball bearings and what is their purpose?

  • Roller Bearings


Roller bearings are designed to carry heavy loads—the primary roller is a cylinder, which means the load is distributed over a larger area, enabling the bearing to handle larger amounts of weight. This structure, however, means the bearing can handle primarily radial loads but is not suited to thrust loads. For applications where space is an issue, a needle bearing can be used. Needle bearings work with small diameter cylinders, so they are easier to fit in smaller applications.

  • Ball Thrust Bearings


These kinds of bearings are designed to handle almost exclusively thrust loads in low-speed low-weight applications. Bar stools, for example, make use of ball thrust bearings to support the seat.

  • Roller Thrust Bearings


Roller thrust bearings, much like ball thrust bearings, handle thrust loads. The difference, however, lies in the amount of weight the bearing can handle: roller thrust bearings can support significantly larger amounts of thrust load, and are therefore found in car transmissions, where they are used to support helical gears. Gear support, in general, is a common application for roller thrust bearings.

Also Read:What are ball bearings and what is their purpose?

  • Tapered Roller Bearings

This style of bearing is designed to handle large radial and thrust loads—as a result of their load versatility, they are found in car hubs due to the extreme amount of both radial and thrust loads that car wheels are expected to carry.

  • Specialized Bearings

There are, of course, several kinds of bearings that are manufactured for specific applications, such as magnetic bearings and giant roller bearings. Magnetic Bearings are found in high-speed devices because it has no moving parts—this stability enables it to support devices that move unconscionably fast. Giant roller bearings are used to move extremely large and heavy loads, such as buildings and large structural components.


    1. Thrust / axial loads are loads which follow the shafts axis or length of shaft acting in the fore/aft plane I.e. a vertical shaft/assembly weight acting downward, a thrust bearing would be required to support the weight of the assembly and allow for rotation eg. a turntable.
      Radial loads are loads which act in the radial plane (radius) of the shaft acting outwards/inwards such as a horizontal shaft supporting a rotating assembly, washing machine etc.

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