71917 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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71917 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The 71917 ACD/HCP4ADGB is a super-precision angular contact ball bearing designed for the most demanding applications. Engineered to the exacting P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high rigidity, making it ideal for high-speed spindles and precision machinery. The use of ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life.
71917 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series and size designation. |
| AC | 25° contact angle, optimized for high axial load capacity. |
| D | Universal Matchable (SU) design. Two bearings can be paired in a universal arrangement to handle axial loads in both directions. |
| HC | Hybrid Ceramic: Features ceramic balls for enhanced performance. |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for runout and dimensional accuracy. |
| DGB | Light preload (Class B), providing high rigidity and optimal running accuracy from startup. |
71917 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 28,000 rpm. This construction also offers superior resistance to wear and electrical arcing.
Phenolic Cage: The lightweight and robust phenolic resin cage ensures excellent dimensional stability at high speeds, contributing to smooth operation and reduced vibration.
Universal Matchable Design (SU): This bearing is universal matchable, meaning any two bearings can be paired face-to-face, back-to-back, or in tandem without selective matching. This simplifies mounting and ensures precise preload control for handling combined loads in any direction.
Precision & Rigidity: Manufactured to P4A tolerance class and supplied with a light preload, this bearing delivers exceptional running accuracy, minimal deflection, and high system rigidity, which is critical for machining precision.
71917 ACD/HCP4ADGB Bearing Typical Application Areas
This high-performance bearing is engineered for advanced machinery requiring supreme accuracy and speed:
- High-Speed Machine Tool Spindles (CNC machining centers, grinders)
- Precision Robotic Drives
- Aerospace & Defense Systems (Gyroscopes, navigation instruments)
- High-Frequency Motors and Spindles
- Medical & Dental Equipment (High-speed handpieces)
