S7004 CD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7004 CD/P4ADBB Bearing Product Overview & Core Advantages
The S7004 CD/P4ADBB is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched pair bearing set features a P4A tolerance class and light preload (Class B), making it ideal for high-speed spindles and other precision machinery. Its duplex DB arrangement provides superior stiffness and the ability to withstand combined radial and axial loads from both directions, ensuring reliable performance in demanding operational conditions.
S7004 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Bearing series and size designation (20mm bore, 42mm OD) |
| C | 15° contact angle design |
| D | Duplex back-to-back (DB) arrangement |
| P4A | High precision tolerance class |
| DBB | Duplex back-to-back mounting with specific preload |
S7004 CD/P4ADBB Bearing Structural Features & Performance Benefits
Enhanced Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and provides exceptional stiffness. This arrangement enables the bearing to handle significant combined radial and axial loads in both directions simultaneously.
High-Speed Performance: Featuring a phenolic cage and optimized internal geometry, this bearing achieves excellent high-speed capability with a limiting speed of 100,000 rpm. The 15° contact angle provides an optimal balance between radial and axial load capacity for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications requiring high rotational accuracy.
Sealed & Lubricated Design: The sealed construction with grease lubrication provides contamination protection and long-term reliability, suitable for operating temperatures from -30°C to 110°C.
S7004 CD/P4ADBB Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- High-Speed Motors - Precision electric motors and servo drives
- Precision Instrumentation - Measuring equipment and optical devices
- Robotics - Joint bearings in industrial robots requiring high accuracy
- Aerospace Components - Guidance systems and auxiliary power units
- Medical Equipment - Dental handpieces and laboratory instrumentation
