S71928 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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S71928 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The S71928 ACD/HCP4ADGA is a high-precision, double row angular contact ball bearing engineered for demanding applications. Its design combines the ability to handle combined loads (radial and bidirectional axial loads) in a single, compact unit. Manufactured to a P4A super-precision tolerance and featuring a 25° contact angle and ceramic balls, this bearing delivers exceptional rotational accuracy, high rigidity, and high-speed performance. The sealed and pre-lubricated design ensures long-term reliability and minimal maintenance, making it an ideal solution for high-end industrial machinery.
S71928 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a high-precision angular contact ball bearing series. |
| 1928 | Specifies the bearing dimensions: 140mm bore, 190mm OD, 48mm width. |
| ACD | Signifies a 25° contact angle and a Universal Matchable (SU) design for duplex pairs. |
| HC | Denotes Hybrid Ceramic construction, featuring ceramic balls for enhanced performance. |
| P4A | Identifies the tolerance class, corresponding to ABEC 7/ISO P4 precision with enhanced running accuracy. |
| DG | Indicates a Sealed bearing on both sides. |
| A | Specifies an Extra Light (Class A) preload. |
S71928 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior rigidity and enables the bearing to support significant combined loads and bidirectional axial loads simultaneously, eliminating the need for complex bearing arrangements.
High-Speed & Low-Friction Performance: The use of ceramic (Si3N4) balls reduces centrifugal forces, lowers operating temperature, and minimizes friction. Combined with the lightweight phenolic resin cage, this allows for a high limiting speed of 11,000 rpm.
Precision & Longevity: Manufactured to P4A super-precision standards, this bearing ensures minimal runout and vibration. The integral seals and factory-applied grease lubrication protect against contamination and provide a long, maintenance-free service life within the specified temperature range.
S71928 ACD/HCP4ADGA Bearing Typical Application Areas
The S71928 ACD/HCP4ADGA is ideally suited for high-performance applications requiring precision, speed, and reliability, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes and Drives
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems
- Medical & Laboratory Equipment
