71904 CD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71904 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71904 CD/P4ADGC is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers optimized performance in high-speed applications while accommodating combined radial and axial loads. Manufactured to P4A tolerance class with a moderate preload (Class C), this bearing ensures smooth operation, minimal vibration, and superior positional accuracy in demanding environments.
71904 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Bearing series and size designation (20mm bore, 37mm OD) |
| CD | Contact angle of 15° and universal matchable design |
| P4A | High precision tolerance class exceeding ABEC 7 |
| DGC | Moderate preload (Class C) for optimal stiffness |
71904 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The universal matchable pair configuration provides exceptional system stiffness, enabling precise control under combined loads. The 15° contact angle optimally balances radial and axial load carrying capacity.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-precision applications.
High-Speed Capability: The phenolic cage and optimized internal geometry support limiting speeds up to 80,000 rpm, making it suitable for demanding spindle applications.
Thermal Stability: The phenolic cage material maintains dimensional stability across the operating temperature range (-30°C to 110°C), ensuring consistent performance under thermal variations.
71904 CD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles
- High-Speed Motors: Spindle motors and precision servo drives
- Medical Equipment: Dental handpieces and surgical tool drives
- Aerospace Systems: Gyroscopes and navigation instrument bearings
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
