6900 Series

6900 Series Deep Groove Ball Bearing - Precision for Compact Applications

The 6900 series deep groove ball bearings are engineered for applications requiring a balance of compact design and reliable performance. These bearings are manufactured to international standards and are suitable for use in environments where space and weight are critical factors. They are characterized by a non-separable design, making them easy to mount and maintain.

Key Features

• Low Cross-Sectional Height: The 6900 series has a small cross-section, which makes it suitable for tight design envelopes and compact machinery.
• High Rotational Speed Capability: Designed to operate effectively at high speeds, which is a key requirement for many high-speed motors, fans, and precision instruments.
• Reduced Noise and Vibration: Manufactured with precision raceways and uniform ball sets to minimize noise and vibration, which is beneficial for sensitive equipment and quiet operation.
• Versatile Sealing Options: Available with a variety of sealing and shielding options to protect against contaminants and retain lubricant, extending service life in diverse operating conditions.

Application Areas

The 6900 series deep groove ball bearing is commonly integrated into the following systems and devices:

• Electric motors and power tools
• Material handling systems and small conveyors
• Medical equipment and laboratory instruments
• Skateboards and bicycles (as part of wheel hubs)
• Printers, scanners, and office automation equipment

Frequently Asked Questions

1. What is the difference between an open 6900 series bearing and a sealed (2RS) bearing, and which should I choose for my application?

The primary difference is the presence of seals. An open bearing is suitable for applications where the bearing is lubricated by an external system or operates in a clean environment. A sealed (2RS) bearing features two contact seals that protect against dust and moisture while retaining lubricant, which extends service life in contaminated environments and reduces maintenance. The choice between the two depends entirely on your operating conditions and maintenance schedule. For specific advice, our application engineers can review your usage case to recommend the most suitable bearing type and lubricant.

2. How do I determine the appropriate fit and tolerance for a 6900 series bearing to prevent premature failure?

Proper fit is critical to the bearing's performance and lifespan. A tight fit can cause excessive preload and overheating, while a loose fit may lead to fretting and shaft or housing damage. The correct fit depends on factors such as the shaft material, operating temperature, and load direction. We adhere to industry standards for fit and tolerance, and detailed data can be found in our technical catalog. To ensure optimal performance and avoid premature failure, we recommend consulting our technical support team to select the precise fit for your specific machine design.