S71910 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71910 CB/HCP4A Bearing Product Overview & Core Advantages
The S71910 CB/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. Its design is optimized to support combined loads—simultaneously handling significant radial loads and axial loads in one direction. Manufactured to the stringent P4 (ABEC-7) tolerance class, this bearing ensures superior running accuracy. A key advantage is its ceramic ball construction, which reduces centrifugal forces, minimizes friction, and enables higher limiting speeds. The phenolic cage and factory-applied lubrication further contribute to its reliability and long service life in demanding operational environments.
S71910 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- S: Denotes a bearing from a specific high-precision series.
- 71910: Standard size designation (50mm bore, 72mm OD, 12mm width).
- C: Indicates a 15° contact angle, optimized for high-speed applications.
- B: Signifies a moderate preload for increased rigidity and precise shaft positioning.
- HC: Refers to the Hybrid Ceramic construction, featuring steel rings and ceramic balls.
- P4A: Specifies the P4 (ABEC-7) tolerance class and potentially special dimensional/geometric accuracy requirements.
S71910 CB/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a lightweight phenolic cage and ceramic balls significantly reduces rotating mass and centrifugal forces. This allows the bearing to achieve a high limiting speed of 30,000 rpm with minimal heat generation.
- High Rigidity & Precision: The 15° contact angle and factory-set preload (B) provide excellent shaft rigidity, minimizing deflection under load and ensuring precise rotational accuracy, which is critical for machine tool spindles.
- Extended Service Life: Ceramic balls are harder and more wear-resistant than steel, and they are electrically insulating, preventing electrical erosion. The sealed design retains lubrication and protects against contamination, enhancing reliability.
- Temperature Resilience: The specified materials and lubrication enable stable operation within a wide temperature range of -30°C to 110°C.
S71910 CB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing equipment.
- High-Speed Motors: Found in robotics, aerospace, and semiconductor manufacturing.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Turbochargers: Supporting shafts at very high rotational speeds.
