71911 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71911 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71911 ACE/HCP4ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a 25° contact angle and P4A tolerance class for superior running accuracy. Its core advantages include the ability to handle combined loads (radial and axial), excellent high-speed capabilities with a limiting speed of 46,000 rpm, and high rigidity due to its precision-ground construction. The use of ceramic balls and a phenolic cage further enhances its performance in high-speed, high-temperature environments.
71911 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing series and size designation (55mm bore, 80mm OD, 26mm width) |
| ACE | Specific internal design and 25° contact angle |
| HC | Hybrid Ceramic (Silicon Nitride) balls |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DGA | Universal Matchable (SU) designation for preload control in sets |
71911 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls reduces centrifugal forces, minimizes friction, and enables higher operating speeds and longer service life, especially in lubricant-starved conditions.
Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring smooth, quiet operation and minimal vibration for high-precision applications.
Phenolic Cage: The lightweight, high-strength phenolic resin cage provides excellent dimensional stability at high speeds and is suitable for the specified temperature range (-30°C to 110°C).
Universal Matchability (SU): This bearing is designed to be universally matchable in any combination, allowing for precise control of preload (Extra light / Class A) when used in pairs, simplifying installation and optimizing system rigidity.
71911 ACE/HCP4ADGA Bearing Typical Application Areas
- High-Speed Machine Tool Spindles: For milling, grinding, and drilling applications requiring high rotational accuracy and speed.
- Precision Robotics: In robot arm joints and gears where high rigidity and minimal deflection are critical.
- Aerospace & Defense Systems: Gyroscopes, avionics cooling fans, and other high-reliability rotating assemblies.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuge spindles.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
