S71905 ACE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71905 ACE/HCP4A Bearing Product Overview & Core Advantages
The S71905 ACE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed single bearing features a 25° contact angle and is supplied with a preload, enabling it to handle combined loads (radial and axial) simultaneously with high rigidity. Its compact design, utilizing ceramic balls and a phenolic cage, is optimized for high-speed operation up to 52,000 rpm, making it ideal for high-reliability, precision machinery.
S71905 ACE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1905 | Bore size code (05 = 25 mm bore). |
| ACE | Specific internal design and contact angle (25°). |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. |
| P4 | High precision class (ABEC-7 equivalent). |
| A | Indicates the bearing is supplied with a light preload. |
S71905 ACE/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and applied preload provide superior stiffness, enabling the bearing to effectively support combined loads with minimal deflection.
Exceptional High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and inertial mass, directly contributing to the high limiting speed of 52,000 rpm. This design minimizes friction and heat generation.
Precision and Longevity: Manufactured to a P4 (ABEC-7) tolerance class, this bearing ensures smooth, quiet, and accurate rotation. The integral seals protect against contamination, and the factory-applied lubrication is suitable for a wide temperature range of -30°C to 110°C, ensuring long service life with minimal maintenance.
S71905 ACE/HCP4A Bearing Typical Application Areas
The S71905 ACE/HCP4A is ideally suited for high-performance applications including:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Dental and Medical Handpieces
- High-Frequency Motors and Spindles
