Spherical Roller Bearing

What is spherical roller bearing?

The spherical roller bearing, also known as the spherical bearing, is categorized in one type of bearings, which is mounted around the moving shaft that is the component of various applications, in order to relieve the load from the given forces by reducing friction.

There are a variety of applications that the spherical roller bearings can be utilized in, such as automotive components, water supply systems, or work holding devices, etc. These applications have the similarity in the rotary shafts they have, which are what the bearings work for.

The shaft in a device, which is a long cylinder, is usually driven by the spindle after the motor is powered up, and it would rotate at a high speed, in order to facilitate the movements of the other part that is attached to it.

During the operation of the device, the rotating shaft and the other part would come in contact with each other, and there would be friction that is made between the contacting surfaces.

When the friction is made, the heat would be produced as well, which result in the obstruction in the operation process, since the friction and heat may cause the deformation of the components or the products. In addition, the rapidly moving parts may also cause the misalignment of the works.

Therefore, the manufacturers would apply the spherical roller bearings on the shafts of the related applications, so as to withstand and relieve the given forces from both axial and radial orientations, and remain the well-functioning of the devices.


How does a spherical roller bearing form?

A spherical roller bearing is comprised of three main parts, including the outer ring, the barrel-shaped rollers, and the inner ring. With the interaction of the three parts, the spherical roller bearing can effectively accommodate to the misalignment of the shaft by receiving relatively heavier loads in a controlled manner.

outer ring
The outer ring is the outer housing of the entire bearing. On the exterior, it is designed to accommodate to the two raceways of the rollers, which the center is made as coincide to the center of the bearing, and looks like a middle line that separates the two sides.

As for the interior, it is the side where the barrel-shaped rollers come in contact and interact with when the loads are given from the radial orientation.

barrel-shaped rollers
The barrel-shaped rollers are arranged in two rows, and each row of the rollers are secured by the cage, which is the device that separate each one of the roller.

The outer side of the rollers is attached to the interior of the outer ring, and the inner side is wrapped around the inner ring.

During the operation of the spherical roller bearings, the separate parts of the cage between each of the rollers are allowed to be applied with lubricant, in order to improve the performance of the reduction of friction.

inner ring
The inner ring, as the name implies, is the ring that is set on the inner side of the two rows rollers, which provides support together with the outer ring in order to the movements of the rollers. Besides, the interior of the inner ring is also where the shaft is attached to.


What are the differences between ball bearings and roller bearings?

There are various kinds of bearings that work with similar principle, but each of them owns different features, and the works that they are suitable to be applied for are different as well.

Among all the kinds of bearings, the ball bearings and the roller bearings are the most commonly compared two kinds, as they have similar configurations, and the rolling elements, which are the balls and the rollers also looks alike.

What are the differences between them? In fact, they are different in the contacting surfaces and the applications they are used for. For the contacting surfaces, the ball bearings are the bearings that replace the rollers into the balls. The balls, no matter the weight or the contacting surface when they contact other objects, are lighter and narrower than the roller bearings.

As for the applications, since the balls in the ball bearings are lighter, they rotate faster than the rollers in the roller bearings, the former are more suitable for lighter loads at higher speed.

In contrast, the contacting surfaces between the latter and their works are relatively wider, they are widely adopted in the applications with heavier loads, as they perform better in the shock and impact resistance.


What to expect to the spherical roller bearings?

As the above introduction has mentioned, the spherical roller bearings are dedicated to support and assist the alignment of the shafts they work for, receive the shocks and impacts that are brought from the loads, and reduce the friction that is produced between the contacting surfaces of the shafts and the attached components.

In other words, these bearings are able to deal with the excessive loads either from the radial or the axial orientations, which are the force from the outer components of the bearings and from the axial movements of the shafts. With these bearings, they can make sure their applications to operate appropriately without problem.

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