S7020 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7020 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The S7020 ACE/HCP4ADT is a duplex tandem (DT) matched pair of P4A super-precision angular contact ball bearings. This configuration is engineered for applications requiring the highest levels of rotational accuracy and axial rigidity. The set is pre-loaded, enabling it to handle combined radial and axial loads simultaneously with exceptional stability. Key advantages include its ceramic ball construction for reduced centrifugal forces and thermal expansion, a phenolic cage for high-speed capability, and pre-applied grease lubrication for immediate operation. This makes it an ideal, compact solution for ultra-high-speed and high-precision spindles.
S7020 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7020 | Bearing series and size designation (100mm bore, 150mm OD). | Defines the core bearing dimensions. |
| ACE | 25° contact angle, phenolic cage, high-precision grade. | Optimized for high-speed performance and high rigidity. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Enables higher speeds, reduced friction, and longer service life. |
| P4A | Tolerance class equivalent to ABEC 7/ISO P4 with additional running accuracy requirements. | Guarantees exceptional running accuracy and low vibration. |
| DT | Duplex Tandem arrangement. | Designed to carry heavy unidirectional axial loads in a compact space. |
S7020 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem (DT) matched pair configuration, combined with a 25° contact angle, provides maximum axial rigidity and the ability to withstand significant combined loads. The preload eliminates internal clearance, ensuring precise shaft positioning and minimal deflection under load.
Ultra-High-Speed Performance: The use of lightweight ceramic (Si3N4) balls significantly reduces centrifugal forces, while the phenolic resin cage offers excellent strength-to-weight ratio and guidance. This synergy allows the bearing to achieve its remarkable limiting speed of 16,250 rpm.
Precision & Longevity: Manufactured to P4A super-precision tolerances, this bearing ensures minimal runout and vibration. The sealed design with pre-applied grease protects against contamination and provides reliable lubrication within the specified temperature range of -30°C to 110°C, contributing to a long, maintenance-free service life.
S7020 ACE/HCP4ADT Bearing Typical Application Areas
This bearing is specifically designed for the most demanding high-speed and high-precision machinery, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and high-speed milling heads.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor spindles.
- Aerospace & Defense Systems: Gyroscopes and other precision instrumentation.
