S71911 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71911 CD/HCP4A Bearing Product Overview & Core Advantages
The S71911 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. As a single-row bearing with a 15° contact angle, it is optimized to handle combined loads, primarily thrust loads in one direction alongside significant radial loads. Its core advantages stem from its P4 (ABEC-7) tolerance class for superior running accuracy, the use of ceramic balls for reduced friction and high-speed capability, and a phenolic cage for quiet operation and low weight. This bearing is preloaded and pre-lubricated, making it an ideal, ready-to-install solution for high-rigidity, high-speed spindle systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a super-precision bearing series. |
| 7 | Indicates an angular contact ball bearing. |
| 1911 | Specifies the bearing dimensions: 55mm bore, 80mm OD, 13mm width. |
| CD | Signifies a 15° contact angle and a specific internal design with preload. |
| HC | Denotes the use of hybrid ceramic balls (silicon nitride). |
| P4 | Specifies the tolerance class (ABEC-7), ensuring ultra-precision. |
| A | Indicates the bearing is lubricated and sealed. |
S71911 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This allows for higher limiting speeds (19,000 rpm) and extended service life compared to all-steel bearings.
- Phenolic Resin Cage: This lightweight and robust cage material contributes to lower centrifugal forces, enabling stable operation at high speeds with minimal vibration and noise.
- Precision & Rigidity: Manufactured to P4 tolerance class, this bearing ensures minimal runout and high positional accuracy. The 15° contact angle and preload provide excellent axial rigidity, crucial for applications requiring precise shaft positioning.
- Sealed & Lubricated for Life: The integral seals protect against contamination, and the factory-applied high-performance grease is suitable for the specified temperature range (-30° to 110 °C), offering a maintenance-free solution.
- High Load Capacity: With a dynamic load rating of 4388 lbf and a static load rating of 3285 lbf, it reliably handles the demanding loads in precision machinery.
S71911 CD/HCP4A Bearing Typical Application Areas
The S71911 CD/HCP4A is ideally suited for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: High-speed measuring devices and optical scanners.
- Semiconductor Manufacturing Equipment: Wafer handling robots and precision stages.
- Dental and Medical Handpieces: Requiring high RPM and reliability.
- High-Frequency Motors and Turbomachinery: Where low friction and thermal stability are critical.
