7212 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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7212 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The 7212 ACD/HCP4ADGB is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and rigidity. Its design enables it to simultaneously support combined loads (radial and bidirectional axial loads) efficiently. Featuring a P4A tolerance class and a 25° contact angle, this bearing delivers superior rotational accuracy and high-speed capability. The use of ceramic balls and a phenolic cage further enhances its performance, making it an ideal choice for high-reliability and high-precision machinery where uncompromising performance is critical.
7212 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7212 | Basic bearing series and size designation (60mm bore, 110mm OD, 44mm width). |
| ACD | Double Row Angular Contact Ball Bearing design with a 25° contact angle. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction, higher speed, and longer service life. |
| P4A | High precision tolerance class, exceeding ABEC-7/ISO P4 standards for exceptional running accuracy. |
| DGB | Universal Matchable (SU) arrangement. Two bearings are universally matchable and supplied as a pre-set pair (Light preload / Class B). |
7212 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides a rigid support system, capable of handling significant combined radial and axial loads from both directions. This makes it exceptionally stable under complex loading conditions.
Enhanced High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 31,000 rpm. This is critical for high-speed spindle applications.
Superior Precision & Longevity: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. The hybrid ceramic construction offers superior wear resistance and operates effectively within a wide temperature range of -30°C to 110°C.
Optimized for Matched Sets: Being Universal Matchable (SU) and supplied as a pre-loaded pair simplifies installation and guarantees optimal preload and performance directly out of the box.
7212 ACD/HCP4ADGB Bearing Typical Application Areas
The 7212 ACD/HCP4ADGB is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Grinding Equipment
- High-Frequency Motors and Spindle Drives
- Medical and Dental Equipment (e.g., High-speed handpieces)
- Aerospace and Defense Instrumentation
