7213 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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7213 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7213 ACD/HCP4ADGA is a high-precision, double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and rigidity. This universally matchable (SU) bearing is designed to accommodate combined loads (radial and axial loads from both directions) simultaneously. Its P4A tolerance class and ceramic ball construction deliver superior running accuracy and high-speed capability, making it ideal for high-performance spindles and precision machinery where reliability is paramount.
7213 ACD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 7213: Basic designation indicating a double row angular contact ball bearing with a 65mm bore, 120mm OD, and 46mm width.
- ACD: Signifies a 25° contact angle and a universal matchable (SU) design, allowing bearings to be mounted in pairs without specific alignment.
- HC: Denotes the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Specifies a super-precision tolerance class with enhanced running accuracy requirements.
- DGA: Indicates a Phenolic (resin) cage, which is lightweight and suitable for high-speed operation.
7213 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides significantly higher radial and axial rigidity compared to single row bearings, enabling stable support under combined loads. The 25° contact angle is optimized for sustaining substantial axial loads.
High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 36,000 rpm. This makes it an excellent high-speed bearing.
Precision & Longevity: Manufactured to P4A super-precision standards, this bearing ensures minimal vibration and precise rotational accuracy. The open seal type is supplied lubricated for immediate use, and the hybrid construction reduces wear, extending service life.
7213 ACD/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed applications across various industries, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles.
- High-Frequency Motors & Spindles: Where extreme rotational speeds are required.
- Precision Instrumentation: Medical equipment, optical scanners.
- Aerospace & Defense Systems: Gyroscopes, navigation systems.
