S71904 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71904 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.037 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.006mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1361 lbf
Radial static load rating
720 lbf
Limiting speed
45 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 188.64
/ each
In Stock
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S71904 CD/P4A Bearing Product Overview & Core Advantages
The S71904 CD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Operating under the stringent P4 (ABEC-7) tolerance class, it is designed to accommodate high axial loads in one direction while simultaneously handling radial loads. Its compact design, featuring a 15° contact angle and preload, ensures high system rigidity, precise rotational performance, and is ideal for high-speed operation up to 45,000 rpm.
S71904 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model designation S71904 CD/P4A provides detailed technical specifications:
- S7: Indicates a series of high-precision angular contact ball bearings.
- 1904: Denotes the size series; '19' for the series and '04' for a 20mm bore diameter.
- C: Specifies a 15° contact angle.
- D: Signifies that the bearing is supplied with a preload for enhanced rigidity.
- P4A: Defines the tolerance class. P4 is equivalent to ABEC-7, indicating very high precision. The 'A' suffix may refer to specific accuracy or internal design variations.
S71904 CD/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a phenolic resin cage and applied preload, this bearing delivers exceptional running accuracy, minimizes deflection, and provides high system stiffness, which is critical for machine tool spindles and other precision equipment.
- Optimized Load Capacity: The 15° contact angle is optimized to efficiently support significant axial loads in one direction combined with radial loads, making it suitable for complex combined loading conditions.
- High-Speed Performance: The lightweight and robust phenolic cage, combined with a high-quality grease lubrication, enables reliable operation at high limiting speeds of 45,000 rpm.
- Sealed & Lubricated for Life: As a sealed and pre-lubricated unit, the bearing is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S71904 CD/P4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Encoders
