Spherical Roller Bearing

What are spherical roller bearings?

Spherical Roller Bearing (SRB) is a bearing element that can rotate with minimal friction and tolerate angular misalignment that can occur during operation. These bearings are primarily used in critical applications where misalignment and high load radial and axial support are required.

Spherical roller bearing structure:-

Spherical Roller Bearing consists of the following components: 

  • Ring outer raceway
  • 2 raceways in the inner ring
  • 2 rows of rollers
  •  Lock the cage roller in place

Factors Affecting Bearing Performance.

1) Symmetrical roller:-

Provides optimal load distribution along the length of the roll and maintains low stress levels in all load conditions.

2) Roller profile:-

To give the roll profile a uniformly distributed load, the ideal roll profile should be spherical. It causes an even distribution of stress across the rollers.

3) Roll tolerance:-

Each roller must be the same size to distribute the optimum load on the rollers and maximize the life.

4) Cage material:-

The SRB metal cage can withstand high temperatures and all kinds of lubricants.

SRB operating temperature limit

1. Ring dimensional stability:- This type of ring is thermally stabilized and can withstand high temperatures when subjected to a special type of heat treatment process.

2.Seals:- Different types of seals can withstand various temperature ranges, such as NBR (up to 90 ° C), HNBR seals (up to 150 ° C), and FKM seals (up to 200 ° C).

3. Lubricant:- Proper selection of lubricant is required to optimally operate the bearing within specified temperature limits.

Material type of spherical roller bearing:-

The bearing ring and the rolling elements are made of chrome steel (high carbon chrome). 1.5% chromium content in it.

The bearing cage can be composed of various materials, such as steel plate, polyamide, brass, steel.

Spherical Roller Bearing Application:-

If there are applications with heavy loads, moderate speed and misalignment, SRB will find them. They are used in the following types of industrial applications:

  •      Gearbox
  •         Wind turbine
  •         Shoe
  •         Road vehicle
  •        Octopus and paper
  •         Mining and construction
  •         Mechanical fan and blower


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