Introduction

Spherical roller bearings are critical components in various mechanical systems. PIB Sales is a leader in the distribution of quality spherical roller bearings. In this article we will discuss the advancements in design materials, applications and types of spherical roller bearings.

Understanding Spherical Roller Bearings

Spherical roller bearings are widely used in various industrial applications due to their ability to handle heavy loads and accommodate misalignment. They are designed with two rows of rollers, a common sphered outer ring raceway, and two inner ring raceways inclined at an angle to the bearing axis. This unique design enables them to efficiently manage both radial and axial loads for extended periods of time.

When discussing types and variations, it is important to mention specific part numbers and brands that have set the industry standard. For example, SKF 222 series, which includes the 

22212 E/C3 SKF Spherical Roller Bearing and 22224E models. Similarly, Timken 223 series, such as the 22315EJ and 22328EJ. NSK HPS series, including models like 22220EAKE4, are noteworthy for their advanced material technology that provides a higher load-carrying capacity and longer life.

Applications of Spherical Roller Bearings in Industry

Spherical roller bearings are essential components in the automotive industry, as they improve vehicle performance. They are commonly used in wheel bearings, where they can handle both radial and axial loads, ensuring smooth operation in different driving conditions. SKF's 22308E and Timken's 22210CJ are popular bearing models for their high load-bearing capacity, durability, and superior ability to handle misalignment while ensuring efficient power transmission in applications such as transmissions and gearboxes.

Spherical roller bearings, the SKF 222 series bearings are particularly important for conveyor belts, which rely on their ability to support heavy loads while maintaining smooth operation. In pumps and heavy machinery, Timken 22315EJ bearings are preferred due to their high load capacity and alignment flexibility, ensuring reliable performance in demanding environments.

Spherical roller bearings, such as the SKF 240 series, play a crucial role in the energy industry, specifically in wind turbines. They are utilized in rotor shafts and gearboxes, where their capacity to handle variable and high load conditions is essential for efficient and continuous power generation.

Maintenance and troubleshooting

Specific maintenance and troubleshooting practices are essential for the longevity and optimal performance of spherical roller bearings. By adhering to the manufacturer's guidelines and conducting thorough and regular checks, the likelihood of bearing failure can be significantly reduced, thus prolonging the service life of these critical components. Maintenance:

• Proper lubrication is essential to prevent wear and tear. For example, SKF’s 22212E bearings require a grease with a consistency of NLGI 2 or 3, and a base oil viscosity of 100-150 mm²/s at 40 °C. The lubrication intervals depend on operational conditions but should typically be every 500 to 1000 operating hours.
•  Bearings should be operated within their specified temperature and humidity ranges. For high-temperature applications, bearings like SKF’s 22308E may require special heat-resistant grease and more frequent maintenance checks.
• Regular inspection for signs of wear, corrosion, or damage is vital. For NSK’s 23030CDE4, for instance, check for raceway wear, cage damage, and roller integrity. Cleaning should involve removing old lubricant and debris, using appropriate solvents and techniques as recommended by the manufacturer.

Troubleshooting:

• Excessive heat can be a sign of overloading, insufficient lubrication, or misalignment. Infrared thermometers can be used to monitor bearings like the NSK 230 series to ensure they operate within safe temperature ranges.
• Regular visual inspections can reveal problems such as scoring, cracks, or brinelling. For bearings such as the SKF 222 series, check for uneven wear patterns on the rollers and raceways, which could indicate misalignment or load imbalances.
• When inspecting sealed bearings, such as those found in the Timken 223 series, check the seals for any indications of wear or damage that may cause lubricant leakage or contamination ingress.

Leading Manufacturers and Market Trends

The market for spherical roller bearings is primarily led by well-known manufacturers such as SKF, Timken, and NSK, who are recognized for their quality and innovative products. SKF's Explorer series and Timken's Spherical Roller Bearing Solid-Block Housed Units are examples of products that have established new standards in bearing performance. The market is experiencing a trend towards developing bearings with higher load capacities, better wear resistance, and increased energy efficiency. This aligns with the global shift towards sustainable and efficient industrial practices. Visit Pacific International Bearings website to explore Spherical Roller Bearings catalog, where you'll find any number of  bearings to meet your specific requirements. 

Whether you're looking for a bearing for a high-load application, a solution for a challenging industrial environment, or advice on maintenance and troubleshooting, PIB Sales has the expertise and products to assist you.