71913 ACBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71913 ACBGA/HCP4A Bearing Product Overview & Core Advantages
The 71913 ACBGA/HCP4A is a single row angular contact ball bearing engineered for ultra-high precision and performance. Positioned in the P4A super-precision tolerance class, it is designed for applications demanding exceptional rotational accuracy and rigidity. A key advantage is its universal matchable (SU) design, allowing two bearings to be precisely paired for optimal preload and stiffness in a back-to-back (DB) or face-to-face (DF) arrangement. The use of ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds and providing superior performance in demanding conditions.
71913 ACBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- 71913: Basic bearing series and size designation (65mm bore, 90mm OD, 13mm width).
- AC: Angular Contact, indicating the bearing is designed to support combined loads.
- BGA: Designates a phenolic (Bakelite) cage, which is lightweight and ideal for high-speed operation.
- HCP4A: A compound suffix.
- HC: Denotes the use of Hybrid Ceramic balls (steel rings with ceramic balls).
- P4A: Specifies a super-precision tolerance class exceeding ABEC 7, ensuring extremely tight dimensional and running accuracy.
71913 ACBGA/HCP4A Bearing Structural Features & Performance Benefits
High Precision and Rigidity: Manufactured to P4A tolerance standards, this bearing guarantees minimal runout and vibration. The 25° contact angle and universal matchable design allow for the creation of a highly rigid, preloaded bearing set, essential for applications requiring maximum shaft positioning accuracy.
High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic balls reduces inertial forces, enabling a high limiting speed of 36,000 rpm. This makes it suitable for very high-speed spindles.
Enhanced Load Capacity: As an angular contact bearing, it is designed to support substantial combined radial and axial loads simultaneously. The extra light preload (Class A) ensures smooth operation and precise control from startup.
Superior Material Selection: The hybrid ceramic construction offers benefits including reduced heat generation, longer service life, and improved resistance to wear compared to all-steel designs.
71913 ACBGA/HCP4A Bearing Typical Application Areas
The 71913 ACBGA/HCP4A is ideally suited for the most demanding high-precision and high-speed machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and rigidity.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and other critical instrumentation.
- High-Frequency Motors and Spindles: Where extreme rotational speeds and precision are paramount.
