S71911 ACB/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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S71911 ACB/HCP4ADGA Bearing Product Overview & Core Advantages
The S71911 ACB/HCP4ADGA is a high-precision double row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered with ceramic balls and a P4A tolerance class, this bearing excels in high-speed operation, offering superior rigidity and the ability to handle combined loads (radial and bidirectional axial loads) simultaneously. Its compact design, featuring a 55mm bore and 80mm outside diameter, makes it an ideal solution for space-constrained, high-performance machinery.
S71911 ACB/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a high-precision bearing series. |
| 1911 | Denotes the standard size series (19) and bore diameter code (11 for 55mm). |
| ACB | Specifies a 25° contact angle and Universal Matchable (SU) design, allowing bearings to be paired in a universal arrangement. |
| HC | Refers to the hybrid ceramic construction (ceramic balls with steel rings). |
| P4A | Indicates an ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and superior running accuracy. |
| DGA | Signifies sealed construction with grease lubrication, providing protection from contamination and long-term, maintenance-free operation. |
S71911 ACB/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides high rigidity and enables the bearing to support significant combined loads and bidirectional axial loads, making it suitable for complex loading conditions.
Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and inertial mass, enabling a high limiting speed of 46,000 rpm. This makes it an exceptional high-speed bearing.
Precision & Longevity: Manufactured to a P4A tolerance class with a 25° contact angle, it delivers exceptional running accuracy and stability. The integral seals and pre-applied grease ensure a long, maintenance-free service life by effectively excluding contaminants and retaining lubrication.
S71911 ACB/HCP4ADGA Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Frequency Motors & Spindles: Where low friction and high rotational speeds are critical.
- Precision Instrumentation: In medical devices, optical scanners, and measuring equipment.
- Aerospace & Defense Systems: For gyroscopes, radar systems, and other critical rotating assemblies.
