6904
6900 Series Thin Section Bearings
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Part No.
Part No.
6904
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
40 g
Tolerance class
ABEC-1
Seal type
Open
For load direction
Radial
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.011mm to 0
Width
9 mm
Width tolerance
-0.120mm to 0
Performance
Temperature range
-30°C to 110 °C
Radial dynamic load rating
1436 lbf
Radial static load rating
828 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Required
Radial internal clearance
C0
Radial internal clearance
0.006mm to 0.020mm
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2.25
/ each
In Stock
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6904 Bearing Product Overview & Core Advantages
The 6904 is a single row deep groove ball bearing designed for reliable performance in a wide range of industrial applications. Engineered with precision to ABEC-1 standards, this bearing excels at handling primarily radial loads while also accommodating moderate axial loads in both directions. Its compact design, featuring a 20 mm bore and a 9 mm width, makes it an ideal solution for space-constrained assemblies requiring high operational reliability and consistent performance.
6904 Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Interpretation |
|---|---|
| 6904 | Basic series designation for a single row deep groove ball bearing with a 20mm bore and 37mm outside diameter. |
| Open (Seal Type) | No integral seals or shields, allowing for higher speed capability and requiring external sealing for contaminated environments. |
| C0 (Radial Internal Clearance) | Standard, normal radial internal clearance group (0.006mm to 0.020mm). |
| ABEC-1 | Defines the precision tolerance class for dimensional accuracy and running performance. |
6904 Bearing Structural Features & Performance Benefits
- Optimized Load Capacity: The deep groove raceway and high-quality chrome steel construction provide a radial dynamic load rating of 1436 lbf and a static rating of 828 lbf, ensuring durability under significant radial stresses.
- High-Speed Capability: The stainless steel cage and open design contribute to a high limiting speed of 22,000 rpm, making it suitable for demanding high-rotation applications.
- Precision Engineering: Manufactured to ABEC-1 tolerance standards with strict bore, outside diameter, and width tolerances, guaranteeing smooth operation and reduced vibration.
- Robust Material Selection: Rings and balls made from chrome steel offer high hardness and wear resistance, while the stainless steel cage provides excellent corrosion resistance and strength.
6904 Bearing Typical Application Areas
This versatile ball bearing is widely used in:
- Electric Motors and Generators
- Gearboxes and Transmission Systems
- Industrial Fans and Blowers
- Material Handling Equipment
- Agricultural Machinery
- Automotive Components (e.g., alternators, idler pulleys)
