How To Check Spherical Roller Bearing Clearance

Spherical roller bearings are a type of rolling-element bearing that is designed to handle heavy loads and operate under harsh conditions. They are commonly used in industrial applications such as mining, construction, and steel manufacturing. Spherical roller bearings are designed to accommodate misalignment and heavy loads, making them ideal for applications where shaft deflection or misalignment may occur.

One of the key factors that determine the performance of spherical roller bearings is the clearance between the rolling elements and the raceways. The clearance of a bearing is the space between the rolling elements and the raceways, and it can affect the bearing's load-carrying capacity, speed, and temperature.

In this article, we will discuss how to check the clearance of spherical roller bearings and why it is important for bearing performance. We will also provide some tips on how to properly install and maintain spherical roller bearings to ensure optimal performance and longevity.

What is Spherical Roller Bearing Clearance?

Spherical roller bearings are designed to accommodate misalignment and heavy loads, which makes them ideal for applications where shaft deflection or misalignment may occur. The clearance of a spherical roller bearing is the space between the rolling elements and the raceways, and it can affect the bearing's load-carrying capacity, speed, and temperature.

The clearance of a bearing is usually measured in um or mm and can be radial, axial, or both. Radial clearance is the space between the rolling elements and the inner and outer raceways in the radial direction, while axial clearance is the space between the rolling elements and the raceways in the axial direction.

Why is Spherical Roller Bearing Clearance Important?

The clearance of a spherical roller bearing is important for several reasons. First, the clearance affects the load-carrying capacity of the bearing. A larger clearance allows the bearing to accommodate more misalignment and heavier loads, while a smaller clearance may result in premature bearing failure.

Second, the clearance affects the speed and temperature of the bearing. A larger clearance can reduce the friction between the rolling elements and the raceways, which can increase the speed and reduce the temperature of the bearing. On the other hand, a smaller clearance can increase the friction and heat generation, which can reduce the speed and increase the temperature of the bearing.

Finally, the clearance affects the noise and vibration of the bearing. A larger clearance can result in more noise and vibration, while a smaller clearance can reduce the noise and vibration. Therefore, it is important to properly check and adjust the clearance of spherical roller bearings to ensure optimal performance and longevity.

How to Check Spherical Roller Bearing Clearance

There are several methods to check the clearance of spherical roller bearings, including the following:

1. Visual Inspection

The first step in checking the clearance of spherical roller bearings is to visually inspect the bearing for any signs of wear or damage. Look for any discoloration, pitting, or scoring on the raceways and rolling elements, as well as any signs of contamination, such as dirt or water. If the bearing shows any signs of wear or damage, it should be replaced.

2. Measuring the Internal Clearance

One of the most common methods to check the clearance of spherical roller bearings is to measure the internal clearance using a feeler gauge. To measure the radial clearance, place the feeler gauge between the rolling elements and the raceways at several points around the circumference of the bearing. To measure the axial clearance, place the feeler gauge between the rolling elements and the raceways in the axial direction.

When measuring the clearance, it is important to follow the manufacturer's specifications and recommendations. The clearance of spherical roller bearings is usually measured in um or mm, and it can vary depending on the size and type of the bearing. If the clearance is outside the manufacturer's recommended range, the bearing may need to be adjusted or replaced.

3. Using a Dial Indicator

Another method to check the clearance of spherical roller bearings is to use a dial indicator. To measure the radial clearance, place the dial indicator on the outer raceway and push the inner raceway in the radial direction. To measure the axial clearance, place the dial indicator on the inner raceway and push the outer raceway in the axial direction.

When using a dial indicator, it is important to apply a uniform load to the bearing to ensure accurate measurements. The clearance of spherical roller bearings is usually measured in um or mm, and it can vary depending on the size and type of the bearing. If the clearance is outside the manufacturer's recommended range, the bearing may need to be adjusted or replaced.

How to Install and Maintain Spherical Roller Bearings

Proper installation and maintenance are essential for the performance and longevity of spherical roller bearings. Here are some tips on how to properly install and maintain spherical roller bearings:

1. Proper Storage

Before installing spherical roller bearings, they should be stored in a clean, dry, and temperature-controlled environment. Avoid storing the bearings near sources of heat, moisture, or magnetic fields, as this can cause damage to the bearings. It is also important to store the bearings in their original packaging or in a protective case to prevent contamination and damage.

2. Proper Handling

When handling spherical roller bearings, it is important to avoid dropping or striking the bearings, as this can cause damage. Use proper lifting equipment and handling techniques to prevent damage to the bearings. It is also important to avoid removing the bearings from their packaging until they are ready to be installed to prevent contamination.

3. Proper Installation

When installing spherical roller bearings, it is important to follow the manufacturer's specifications and recommendations. Make sure the bearing is properly aligned and seated in the housing, and use the correct tools and techniques to avoid damaging the bearing. It is also important to properly lubricate the bearing before installation to reduce friction and heat generation.

4. Proper Maintenance

Regular maintenance is essential to ensure the optimal performance and longevity of spherical roller bearings. It is important to monitor the temperature, noise, and vibration of the bearings regularly to detect any signs of wear or damage. It is also important to properly lubricate the bearings at regular intervals to reduce friction and heat generation.

If the clearance of a spherical roller bearing is outside the manufacturer's recommended range, it may need to be adjusted. There are several methods to check and adjust the clearance of spherical roller bearings, including visual inspection, measuring the internal clearance, and using a dial indicator. It is important to follow the manufacturer's specifications and recommendations to ensure the optimal performance and longevity of spherical roller bearings.