7012 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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7012 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7012 ACDGA/HCP4A is a single row angular contact ball bearing designed for ultra-high precision and performance in demanding applications. Engineered to a P4A super-precision tolerance class, this bearing is characterized by its ability to support high combined loads (radial and axial) simultaneously, with a consistent 25° contact angle ensuring optimal load distribution. Its core advantages include exceptional high-speed capability, facilitated by a lightweight phenolic cage and ceramic balls, and superior running accuracy due to its universal matchable (SU) designation, allowing for precise preload control when mounted in sets. This bearing is pre-lubricated for immediate operation and is ideal for applications requiring maximum rigidity and minimal rotational error.
7012 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7012 | Standard bearing series designation with a 60 mm bore and 95 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Specific internal design and cage type, indicating a phenolic (resin) cage. |
| HCP4A | Indicates the tolerance class P4A (super precision) and universal matching (SU) capability for sets. |
7012 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Low Friction Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a very high limiting speed of 39,000 rpm. This makes it an ideal high-speed bearing.
Rigidity & Load Capacity: The 25° contact angle and robust construction provide excellent stiffness, effectively handling significant radial loads and one-directional thrust loads. The universal matchable (SU) feature allows multiple bearings to be arranged in tandem, back-to-back, or face-to-face configurations to further increase system rigidity and load capacity.
Ultra-Precision Operation: Manufactured to P4A tolerance standards, this bearing ensures extremely tight dimensional and running accuracy, resulting in minimal vibration and superior positional control in precision machinery.
Pre-Lubricated & Ready-to-Use: The bearing comes pre-lubricated, ensuring immediate and reliable operation upon installation within the specified temperature range.
7012 ACDGA/HCP4A Bearing Typical Application Areas
The 7012 ACDGA/HCP4A is engineered for the most demanding high-precision and high-speed rotational systems. Its key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- Precision Robotics: In high-accuracy robotic arm joints and actuators.
- Aerospace & Defense Systems: In gyroscopes, radar systems, and other critical navigation and control equipment.
- High-Frequency Motors & Spindles: Where low vibration and high rotational speeds are paramount.
