71911 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71911 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A tolerance class, this bearing delivers superior speed capability, reduced friction, and extended service life. Its extra light preload (Class A) ensures smooth, precise operation with minimal running torque, making it ideal for high-speed spindles and other precision machinery where rigidity and rotational accuracy are paramount.
71911 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 13mm width) |
| C | 15° contact angle |
| DG | Universal Matchable bearing (can be paired in various preload configurations) |
| A | Extra light preload (Class A) |
| HCP4A | High-precision tolerance class (P4A) with phenolic cage and ceramic balls |
Structural Features and Performance Benefits
Advanced Material Combination: The use of ceramic balls (Si3N4) in conjunction with chrome steel rings significantly reduces centrifugal forces, enabling higher limiting speeds (34,000 rpm). This material combination also provides superior resistance to wear and operates effectively across a wide temperature range (-30°C to 110°C).
Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for exceptional rotational accuracy.
Optimized Cage Design: The phenolic cage offers excellent strength-to-weight ratio, contributing to lower inertia and smoother operation at high speeds while providing good compatibility with various lubricants.
Universal Matching Capability: As a Universal Matchable (SU) bearing, the 71911 CDGA/HCP4A can be precisely paired with other identical bearings to create optimized bearing sets for specific preload and stiffness requirements.
71911 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Medical Equipment: Dental handpieces, surgical drill motors, and laboratory centrifuges
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- High-Speed Automation: Robotics, pick-and-place systems, and semiconductor manufacturing equipment
- Test and Measurement: Coordinate measuring machines and precision rotary tables
