71918 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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71918 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 71918 CD/HCP4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-precision machinery. The use of ceramic balls and a phenolic cage further enhances its performance in demanding operational environments.
71918 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- 71918: Basic designation indicating a 90mm bore, 125mm OD, 36mm width angular contact bearing.
- CD: Indicates a duplex (DB) back-to-back mounting arrangement, providing high moment rigidity.
- HC: Signifies the use of Hybrid Ceramic balls (steel rings, ceramic balls).
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7 standards.
- DB: Confirms the back-to-back (DB) matched set configuration.
- A: Specifies an Extra Light preload for optimal stiffness and minimal friction.
71918 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise alignment under heavy combined loads.
Enhanced Speed & Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for significantly higher limiting speeds (15,000 rpm) and reduced operating temperatures compared to all-steel equivalents.
Superior Precision: Manufactured to P4A tolerance standards, this bearing delivers exceptional running accuracy, low noise, and minimal vibration, which is critical for spindle applications.
Optimized for Preload: The Extra Light (A) preload is factory-set, eliminating the need for on-site adjustment and ensuring immediate, optimal bearing performance with high stiffness from startup.
71918 CD/HCP4ADBA Bearing Typical Application Areas
This high-precision bearing is ideally suited for applications requiring high speed, rigidity, and accuracy, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Grinding Equipment
- High-Frequency Motors
- Aerospace & Defense Systems
- Medical Equipment Spindles
