S71911 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71911 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S71911 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, universal-matchable design with an extra light preload (Class A), making it ideal for spindle assemblies and other high-speed machinery. Its core advantages include the ability to handle combined loads efficiently due to a 25° contact angle, superior running accuracy from its P4A tolerance class, and reliable, long-term operation with factory-applied grease lubrication and integrated seals.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71911 | Denotes the bearing series and size (55mm bore, 80mm OD, 13mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | High-precision, universal-matchable bearing set. |
| GA | Indicates a specific internal clearance and preload (Extra light / Class A). |
| HCP4A | Specifies the tolerance class P4A (very high precision) and the presence of seals. |
S71911 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Rigidity: The combination of a phenolic resin cage and ceramic balls significantly reduces centrifugal forces and friction, enabling a high limiting speed of 34,000 rpm. This design ensures low heat generation and maintains high rigidity under operational stresses.
Superior Load Capacity: The 25° contact angle is optimized to support significant combined radial and axial loads simultaneously, providing stable performance in complex loading conditions.
Ultra-Precision & Longevity: Manufactured to P4A tolerance class with chrome steel rings, this bearing guarantees exceptional running accuracy and dimensional stability. The integral seals protect against contamination, and the pre-applied grease ensures consistent lubrication, resulting in a maintenance-free service life within a temperature range of -30°C to 110°C.
S71911 ACDGA/HCP4A Bearing Typical Application Areas
The S71911 ACDGA/HCP4A is ideally suited for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors and Spindles
- Robotic Drives and Actuators
