S71916 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71916 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71916 CD/P4ADBA is a precision duplex back-to-back angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a P4A tolerance class bearing, it offers extremely tight dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. Its duplex back-to-back (DB) arrangement provides high rigidity and excellent moment load capacity, enabling it to handle combined radial and axial loads simultaneously. Pre-loaded to an extra light (Class A) specification, it ensures precise shaft positioning with minimal axial play, contributing to superior system performance and longevity.
S71916 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71916 | Basic bearing designation, indicating a 80mm bore, 110mm OD angular contact ball bearing. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings). |
| DB | Specifies the Back-to-Back arrangement of the duplex pair, providing high rigidity against moment loads. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy, superior to standard ABEC 7 / ISO P4. |
| Sealed | The bearing is equipped with integral seals to retain lubricant and exclude contaminants. |
S71916 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, which is critical for maintaining precision in machine tool spindles.
Superior Precision & Smooth Operation: Manufactured to P4A tolerance class with extremely tight bore, outer diameter, and width tolerances, this bearing ensures minimal runout and vibration. The phenolic resin cage offers excellent guidance, low friction, and is ideal for high-speed applications, contributing to a limiting speed of 28,000 rpm.
Optimized Load Handling: The 15° contact angle provides a balanced performance for both radial and axial loads. With a dynamic load rating of 13,320 lbf and a static load rating of 17,550 lbf, it is engineered for demanding duty cycles.
Long-Term Reliability: As a sealed and pre-greased unit, the bearing is protected from contamination and is lubricated for life under normal operating conditions within its specified temperature range of -30°C to 110°C, reducing maintenance requirements.
S71916 CD/P4ADBA Bearing Typical Application Areas
The S71916 CD/P4ADBA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Test & Measurement Equipment: Where minimal rotational error is critical.
