7020 CE/HCP4ALDT
Hybrid Ceramic Super Precision Bearings
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7020 CE/HCP4ALDT Bearing Product Overview & Core Advantages
The 7020 CE/HCP4ALDT is a duplex tandem (DT) angular contact ball bearing designed for high-precision applications requiring exceptional stiffness and high-speed performance. This precision bearing features a P4A tolerance class and is preloaded, enabling it to handle significant combined loads (radial and axial) with minimal deflection. Its optimized design, incorporating a phenolic cage and ceramic balls, results in superior rotational accuracy and a high limiting speed, making it ideal for demanding machine tool spindles and other high-performance machinery.
7020 CE/HCP4ALDT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7020 | Standard bearing series designation, indicating bearing dimensions (100mm bore, 150mm OD, 48mm width). |
| CE | Indicates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce friction, heat generation, and wear. |
| P4A | Denotes an ultra-precision tolerance class with very tight running accuracy and dimensional control. |
| DT | Specifies a Duplex Tandem arrangement. Two bearings are mounted together to primarily increase axial load capacity in one direction. |
7020 CE/HCP4ALDT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement and angular contact design provide exceptional system stiffness, effectively resisting operational deflection under heavy combined loads.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a very high limiting speed of 20,000 rpm. The 15° contact angle is specifically chosen for optimal high-speed operation.
Enhanced Durability & Precision: Hybrid ceramic balls offer superior wear resistance and lower thermal expansion compared to steel, contributing to longer service life and consistent precision under varying thermal conditions. The P4A tolerance class ensures minimal runout and vibration.
Preload & Matched Set: Supplied as a preloaded and matched set, this bearing eliminates internal clearance, providing immediate high stiffness and rotational accuracy without requiring complex adjustment during installation.
7020 CE/HCP4ALDT Bearing Typical Application Areas
This high-performance duplex tandem bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and high-frequency motor spindles.
- Robotics: High-accuracy rotary joints and arm actuators.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical navigation equipment.
