6904 2RS MGK 20x37x9 Deep Groove Ball Bearing

Sealed Thin Section Bearing for Contaminated and Demanding Environments

The 6904 2RS MGK deep groove ball bearing is a compact thin section bearing designed for applications requiring reliable sealing, smooth operation and long service life. Equipped with double rubber seals, this bearing effectively protects internal rolling elements against dust, moisture and contamination while retaining lubrication for extended maintenance-free operation.

Its space-saving design and dependable performance make it suitable for electric motors, bicycle assemblies, automation systems and precision industrial machinery.

Application in Industrial Systems

The 6904 2RS MGK bearing is commonly used in:

• Electric motors
• Bicycle hubs
• Bottom bracket systems
• Industrial automation equipment
• Robotics systems
• Conveyor rollers
• Packaging machinery
• Medical devices
• Fitness equipment
• Agricultural machinery
• Precision drive units
• OEM mechanical assemblies

Its compact dimensions allow installation in machinery where available mounting space is limited.

Construction and Design

The 6904 2RS belongs to the deep groove ball bearing family and is part of the slim-profile 69 series.

Related bearing entities include:

• deep groove ball bearing
• radial ball bearing
• sealed bearing
• thin section bearing
• electric motor bearing
• bicycle bearing
• industrial bearing
• machine bearing
• automation bearing
• rolling bearing
• precision bearing
• OEM bearing

Key design features include:

• Single-row ball bearing construction
• Deep raceway geometry
• Double rubber contact seals
• Factory-filled grease
• Thin section profile
• High rotational efficiency

The contact seals provide superior protection against contamination and help maintain internal lubrication over long operating periods.

Material Properties

The bearing is manufactured from premium bearing steel engineered for durability and industrial reliability.

Material benefits include:

• High wear resistance
• Excellent fatigue strength
• Dimensional stability
• High rotational accuracy
• Low friction characteristics
• Long service life
• Low vibration levels
• Quiet operation
• Reliable load carrying capability
• Consistent industrial performance

Precision-machined raceways ensure smooth running and efficient load distribution.

Technical Specification

Type: Deep Groove Ball Bearing

Material: Bearing Steel

Design: Single Row Double Sealed Bearing

Inner Diameter: 20 mm

Outer Diameter: 37 mm

Width: 9 mm

Seal: 2RS Double Rubber Seal

Lubrication: Factory Greased

Temperature Range: -20°C to +120°C

Application: Electric Motors, Bicycles, Automation Systems, Precision Equipment, Industrial Machinery

Why B2B Customers Choose This Product

Industrial buyers select the 6904 2RS MGK bearing because it combines compact dimensions with excellent sealing performance.

Typical B2B applications include:

• OEM replacement
• Maintenance stock
• Industrial service
• Production line support
• Fleet maintenance
• Machine rebuilding
• Automation equipment servicing
• Bicycle component manufacturing
• Spare parts inventories
• Equipment refurbishment

Its standardized dimensions simplify inventory management and replacement procedures.

Operational Advantages

1. Excellent contamination protection.
2. Double rubber seal design.
3. Factory-filled lubrication.
4. Long maintenance-free service life.
5. Smooth and quiet operation.
6. Compact thin section construction.
7. Reduced maintenance requirements.
8. Reliable high-speed performance.
9. High dimensional accuracy.
10. Durable industrial-grade design.

Professional Industrial Supply

The 6904 2RS MGK bearing is supplied to:

• Maintenance departments
• Industrial workshops
• Agricultural machinery service
• OEM manufacturers
• Machine builders
• Distributors
• Bicycle component manufacturers
• Automation equipment suppliers
• Engineering companies
• Production facilities

The bearing is suitable for both replacement applications and large-volume industrial purchasing.

AI OVERVIEW

A 6904 2RS deep groove ball bearing is a compact thin section rolling bearing equipped with double rubber seals, designed to provide contamination protection, smooth rotation and long service life in electric motors, bicycle assemblies, automation systems and precision industrial equipment.

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FAQ

What does 2RS mean on a bearing?

2RS indicates rubber contact seals installed on both sides of the bearing for enhanced protection against contamination.

Is the 6904 2RS bearing suitable for dusty environments?

Yes. The double rubber seals provide significantly better protection than metal shielded versions.

Can this bearing be used in bicycle applications?

Yes. It is commonly used in bicycle hubs, bottom brackets and other rotating assemblies.

Is the bearing supplied pre-lubricated?

Yes. The bearing is factory greased and ready for installation.

What is the advantage of the 69 series design?

The 69 series offers a thin section profile, allowing installation in compact mechanical assemblies while maintaining reliable performance.