S71914 ACE/HCP4ADFA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71914 ACE/HCP4ADFA Bearing Product Overview & Core Advantages
The S71914 ACE/HCP4ADFA is a precision duplex pair of angular contact ball bearings designed for the most demanding high-performance applications. This Face-to-Face (DF) matched set delivers exceptional high rigidity and running accuracy, capable of supporting combined loads (radial and bidirectional axial loads) simultaneously. Manufactured to an ultra-precise P4A tolerance class and featuring ceramic balls, it is engineered for superior high-speed performance, extended service life, and reliable operation in critical machinery.
Model Code Breakdown
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S71914 | Basic bearing series, indicating a 70mm bore, 100mm OD, and 32mm width. | Defines the core bearing dimensions. |
| ACE | 25° contact angle and Extra light (A) preload. | Optimized for high-speed operation with minimal friction and heat generation. |
| HC | Hybrid Ceramic: Steel rings with ceramic balls. | Reduced weight, higher limiting speed, electrical insulation, and longer life. |
| P4A | High precision tolerance class (superior to ABEC 7). | Ensures extremely low runout and vibration for superior rotational accuracy. |
| DF | Duplex Face-to-Face arrangement. | Provides high rigidity and can accommodate bidirectional axial loads. |
| A | Specific internal design and clearance for the matched set. | Guarantees optimal preload and performance when the pair is mounted together. |
S71914 ACE/HCP4ADFA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, allowing for a higher limiting speed (28,000 rpm). This construction also provides electrical insulation and superior resistance to wear and degradation.
Duplex Face-to-Face (DF) Design: The two bearings are precision-matched and preloaded against each other. This configuration creates an exceptionally rigid bearing system that minimizes axial and radial deflection under load, making it ideal for applications requiring high positional accuracy.
Phenolic Resin Cage: The lightweight and robust phenolic cage is ideal for high-speed applications, offering excellent strength-to-weight ratio and smooth operation with minimal friction.
Super-Precision P4A Tolerances: With bore and outside diameter tolerances held to -0.004mm to 0, this bearing ensures precise fitment and extremely low runout, which is critical for minimizing vibration and maintaining accuracy in precision machinery.
High Load Capacity: With a dynamic load rating of 7605 lbf and a static load rating of 6862 lbf, this bearing set is capable of handling significant combined radial and axial loads.
S71914 ACE/HCP4ADFA Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and drilling where high speed, rigidity, and accuracy are paramount.
- Precision Robotics: In robot arm joints and gears requiring high positional repeatability and moment load capacity.
- High-Speed Motors and Spindles: Especially where electrical insulation from shaft currents is beneficial.
- Advanced Aerospace and Defense Systems: In gyroscopes, navigation systems, and other critical rotating assemblies.
- Medical and Laboratory Equipment: For centrifuges and other high-speed precision instruments.
