71912 ACEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71912 ACEGA/HCP4AL Bearing Product Overview & Core Advantages
The 71912 ACEGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is manufactured to P4A tolerance class, ensuring ultra-precise operation. Its core advantage lies in its ability to accommodate combined loads (radial and axial) simultaneously while maintaining high running accuracy. The use of ceramic balls and a phenolic cage contributes to its suitability for high-speed applications, offering reduced weight, lower friction, and extended service life. It is universally matchable (SU), allowing for precise preload setting when mounted in pairs.
71912 ACEGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
- 71912: Basic series code, indicating a metric, angular contact bearing with a 60mm bore, 85mm OD, and 13mm width.
- AC: Angular Contact design.
- E: Optimized internal design for enhanced performance and load capacity.
- GA: Universal Matchable bearing. "GA" indicates a specific axial internal clearance and tolerance for pairing.
- HCP4A: High-Precision Tolerance Class. "P4A" denotes very high dimensional and running accuracy, superior to standard ABEC 7.
- L: Light preload (Extra light / Class A).
71912 ACEGA/HCP4AL Bearing Structural Features & Performance Benefits
- High Precision and Rigidity: Manufactured to P4A tolerance class, this bearing provides exceptional running accuracy and system rigidity, which is critical for applications like machine tool spindles.
- Superior High-Speed Capability: The combination of a lightweight phenolic resin cage and ceramic balls (Silicon Nitride) significantly reduces centrifugal forces, enabling stable operation at the high limiting speed of 36,000 rpm.
- Excellent Load Capacity: With a 25° contact angle and optimized internal geometry, it effectively handles combined radial (3442 lbf dynamic) and axial loads.
- Reduced Friction and Long Life: Ceramic balls are harder, lighter, and more wear-resistant than steel, leading to lower operating temperatures, less energy consumption, and a longer operational lifespan, especially in contaminated or electrically sensitive environments.
- Pre-Lubricated: Comes pre-lubricated for immediate use, suitable for its specified temperature range of -30°C to 110°C.
71912 ACEGA/HCP4AL Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotic Drives
- High-Frequency Motors and Spindles
- Aerospace Control Systems
- Medical and Dental Equipment (High-speed handpieces)
- Test and Measurement Equipment
