• Dental Handpiece and Lab Tool Motors
• Diagnostic and Monitoring Device Drives
• Pump and Fluid Handling Mechanisms

• Automotive Auxiliary Motors and Actuators
• E-Mobility Drivetrain Support Bearings
• Dashboard and Control Unit Drives

• Small Industrial and Hobby Motors
• Servo and Stepper Motor Drives
• Optical and Sensor Rotary Supports

• Cooling Fans for Electronics and Communication Devices
• Household and Personal Appliance Motors
• Office and Printing Equipment Mechanisms

01. Optimized Ultra-Thin Design

Featuring a slim 9 mm width, the 6904-2RS achieves an optimal balance between space conservation and functional performance. Its compact form factor supports assembly designs with strict axial space limitations while maintaining adequate load support.

02. Reliable Sealing for Challenging Environments

Equipped with two integrated rubber contact seals (2RS), this bearing ensures durable protection against moisture and particulate contamination. This contributes to extended service intervals and reliable operation in humid, dusty, or demanding settings.

03. Smooth and Stable Operation

Precision-engineered from chrome steel with optimized internal clearances, it delivers consistently quiet running with low vibration, ensuring accurate and refined rotational performance for precision mechanisms.

Interchange Part Numbers

Common manufacturer equivalents include:

• SKF: 6904-2RS
• NSK: 6904DDU
• FAG: 6904-2RSR
• NTN: 6904LLU
• KOYO: 6904LLB

Design & Configuration

The 6904-2RS is equipped as standard with two rubber contact seals, making it suitable for applications exposed to dust, humidity, or occasional fluid contact. For high-speed operation in clean and dry environments, the double metal-shielded version (6904-ZZ) is available as an alternative configuration.

"A premier choice for space-sensitive applications including small motors, precision instruments, and compact drives, where reliable sealing and a slim, robust design are simultaneously required."