S71919 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71919 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71919 CD/P4ADBA is a precision duplex back-to-back angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing excels in handling combined radial and axial loads simultaneously. Its extra light preload (Class A) ensures minimal deflection and smooth operation, making it ideal for high-speed spindles and other precision machinery where stability and accuracy are paramount. The sealed design with phenolic cage contributes to its reliable, long-lasting performance.
S71919 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71919 | Basic bearing designation (19mm bore angle contact series) |
| C | 15° contact angle |
| D | Duplex arrangement |
| P4A | High precision tolerance class (exceeds ABEC 7) |
| DB | Back-to-Back mounting arrangement for high moment rigidity |
| A | Extra light preload classification |
S71919 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers, significantly enhancing moment rigidity and operational stability under complex loading conditions.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, this bearing effectively handles combined radial and axial loads in both directions, supported by a substantial dynamic load rating of 17,842 lbf.
Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring minimal runout and vibration for high-precision applications.
High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio and smooth operation at limiting speeds up to 21,000 rpm, while the sealed design retains lubrication effectively.
Sealed & Lubricated Design: Factory-sealed and pre-lubricated with grease, offering protection against contamination and providing maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71919 CD/P4ADBA Bearing Typical Application Areas
The S71919 CD/P4ADBA is specifically engineered for high-performance applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial transmission systems requiring minimal deflection
- Medical Equipment - Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Components - Guidance systems, actuators, and auxiliary power units
- Robotics & Automation - High-accuracy robotic joints and positioning systems
- Test & Measurement Equipment - Coordinate measuring machines and optical inspection systems
