S71905 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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S71905 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71905 CE/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This back-to-back (DB) matched pair configuration delivers superior rigidity and can accommodate combined radial and axial loads from both directions. Manufactured to P4A tolerance class and featuring ceramic balls, it is engineered for high-speed operation, extended service life, and reliable performance in precision machinery.
S71905 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71905 | Denotes the bearing series and size (Bore: 25mm, OD: 42mm, Width: 18mm). |
| CE | Indicates a 15° contact angle and specific internal design for optimized performance. |
| HC | Signifies the use of Hybrid Ceramic balls, offering reduced friction, higher speed capability, and longer life. |
| P4A | Specifies the ultra-precision tolerance class, exceeding ABEC 7 standards for superior running accuracy. |
| DB | Indicates a Duplex Back-to-Back arrangement, providing high moment rigidity. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed performance. |
S71905 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and accommodates combined radial and axial loads from both directions, making it ideal for precise spindles.
Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-friction hybrid ceramic balls significantly reduces centrifugal forces and operating temperatures, enabling a high limiting speed of 83,000 rpm.
Enhanced Durability & Longevity: Ceramic balls are electrically resistant, harder, and lighter than steel, leading to dramatically reduced wear, extended lubricant life, and superior performance in challenging environments.
Precision & Accuracy: Manufactured to P4A tolerance class with a 15° contact angle, this bearing ensures exceptional running accuracy, low noise, and minimal vibration for the most demanding precision applications.
S71905 CE/HCP4ADBA Bearing Typical Application Areas
The S71905 CE/HCP4ADBA is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- High-Frequency CNC Spindles
- Precision Grinding Machine Spindles
- High-Speed Machining Centers
- PCB Drilling & Milling Spindles
- Dental & Medical Handpiece Spindles
