7020 ACD/HCP4ATBTA
Hybrid Ceramic Super Precision Bearings
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7020 ACD/HCP4ATBTA Bearing Product Overview & Core Advantages
The 7020 ACD/HCP4ATBTA is a metric precision angular contact ball bearing supplied as a triplex back-to-back (TBT) matched set. Engineered for the most demanding applications, this configuration delivers exceptional system rigidity and stability under complex combined loads. The use of ceramic balls and a P4A super-precision tolerance class makes it an ideal solution for high-speed spindles requiring maximum operational accuracy and long-term reliability.
7020 ACD/HCP4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 7020 | Standard bore diameter (100 mm) and outside diameter (150 mm) dimensions. |
| ACD | Angular Contact Design with a 25° contact angle for optimal axial load capacity. |
| HCP4A | Indicates P4A tolerance class (higher than ABEC 7) and a phenolic cage. |
| TBTA | Specifies a Triplex Back-to-Back Arrangement with an Extra Light (Class A) preload. |
7020 ACD/HCP4ATBTA Bearing Structural Features & Performance Benefits
Unmatched Rigidity & Load Capacity: The triplex back-to-back (TBT) matched set of three bearings creates an extremely rigid support system, capable of handling significant combined radial and axial loads from multiple directions. This is critical for minimizing deflection in high-precision machinery.
High-Speed & Thermal Stability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 15,000 rpm. Ceramic balls also offer superior resistance to thermal expansion, maintaining preload and accuracy.
Precision & Longevity: Manufactured to P4A super-precision tolerances with a consistent 25° contact angle, this set ensures smooth, quiet operation and extended service life. The bearings are pre-lubricated for immediate use.
7020 ACD/HCP4ATBTA Bearing Typical Application Areas
This high-performance bearing set is specifically designed for advanced applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles (for milling, grinding, and drilling)
- Precision Robotics and Automation Arms
- Aerospace & Defense Actuation Systems
- High-Speed CNC Machining Centers
