71928 ACD/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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71928 ACD/HCPA9ADGA Bearing Product Overview & Core Advantages
The 71928 ACD/HCPA9ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features a 25° contact angle and is supplied in a pre-lubricated, universal matchable (SU) set of two, allowing for flexible mounting configurations to support combined loads. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance and operational stability, making it ideal for high-reliability machinery.
71928 ACD/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design, 25° contact angle |
| H | Enhanced performance specifications |
| C | Ceramic ball material (Silicon Nitride) |
| PA9A | High precision tolerance class (PA9A) |
| DGA | Universal Matchable (SU) set, preloaded |
71928 ACD/HCPA9ADGA Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a phenolic cage and ceramic balls significantly reduces centrifugal forces and friction, enabling a limiting speed of 11,000 rpm. This makes it an exceptional high-speed bearing solution.
Rigidity & Load Capacity: With a 25° contact angle and universal matchable design, this bearing provides high rigidity and can efficiently support combined radial and axial loads. The radial dynamic load rating of 32,850 lbf ensures reliable performance under demanding conditions.
Precision Engineering: Manufactured to PA9A tolerance class with tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and minimal vibration.
Temperature Performance: The ceramic ball construction and phenolic cage allow stable operation across a wide temperature range from -30°C to 110°C.
71928 ACD/HCPA9ADGA Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine tool spindles and high-speed machining centers
- Precision grinding equipment and dental machining systems
- High-frequency spindle motors and robotics
- Aerospace positioning systems and medical instrumentation
- Semiconductor manufacturing equipment
