Guide to servicing shielded bearings

Guide to Servicing Shielded Bearings


Shielded bearings are a crucial component in various industries, providing support and reducing friction in rotating machinery. In this comprehensive guide, we will delve into the proper servicing techniques for shielded bearings, ensuring their longevity and optimal performance.

1. Understanding Shielded Bearings

Shielded bearings, also known as ZZ bearings, are designed with metal shields that prevent the ingress of contaminants such as dust, dirt, and moisture. These shields help to protect the internal components of the bearing, ensuring smooth operation and increased durability.

1.1 Components of Shielded Bearings

Shielded bearings consist of several essential components:

  • Inner Ring: The inner ring provides a raceway for the rolling elements.
  • Outer Ring: The outer ring houses the bearing and provides a mounting surface.
  • Rolling Elements: These are the balls or rollers that enable the rotational movement of the bearing.
  • Cage: The cage holds the rolling elements in place, maintaining their proper alignment.
  • Metal Shields: The metal shields act as a protective barrier, shielding the internal components from contaminants.

Shielded Bearings

2. Servicing Shielded Bearings

Proper servicing of shielded bearings is essential to ensure their optimal performance and extend their lifespan. Here are the key steps to follow:

2.1 Inspection

Prior to servicing, perform a thorough inspection of the shielded bearings to identify any signs of wear, damage, or contamination. Pay close attention to the metal shields, as they can become bent or corroded over time.

2.2 Cleaning

Begin by removing the metal shields using specialized tools. Clean the shields and the bearing components using a suitable solvent to remove any accumulated dirt or grease. Ensure that the solvent is compatible with the bearing material to avoid any damage.

2.3 Lubrication

Apply a high-quality lubricant to the clean bearing components, ensuring even distribution. The lubricant should have the appropriate viscosity and temperature range for the operating conditions. Avoid over-lubrication, as it can lead to excessive heat generation and premature failure.

2.4 Reassembly

Once the cleaning and lubrication process is complete, carefully reassemble the shielded bearings. Ensure that the metal shields are properly aligned and securely attached. Use the recommended torque specifications to tighten any fasteners.

Shielded Bearings Application


Shielded bearings play a vital role in various industries, providing reliable support and reducing friction. By following the proper servicing techniques outlined in this guide, you can maximize the performance and lifespan of your shielded bearings.

Author: Czh

Company Promotion and Introduction

Our company holds a leading position in the Chinese bearings market, offering a wide range of high-quality products. Our product portfolio includes shielded bearings, track bearings, plastic rollers with bearings, ball bearing rollers, sliding bearings, cup bearings, cage bearings, and more. With 300 sets of automated CNC production equipment and fully automated assembly equipment, we are committed to delivering superior products, competitive prices, and exceptional service. We also offer customization services based on customer requirements.


Welcome to our company, where quality products, competitive prices, and attentive service await you.


Recent Posts