S7004 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7004 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The S7004 ACE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. As a matched duplex tandem (DT) arrangement, this pair of bearings is preloaded to deliver superior high rigidity and axial stability. Its construction, featuring a ceramic ball and phenolic cage, is optimized for high-speed operation up to 100,000 rpm. This bearing is engineered to handle combined radial and axial loads simultaneously, making it an ideal solution for high-precision, high-reliability machinery where uncompromising accuracy and stiffness are paramount.
S7004 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7004 | Bearing series and size designation (20mm bore, 42mm OD) | Defines the core bearing dimensions. |
| ACE | 25° contact angle, phenolic cage, high-precision | Optimized for high-speed performance and rigidity. |
| HC | Hybrid Ceramic (Ceramic balls, steel rings) | Reduces friction and heat generation, enabling higher speeds and longer life. |
| P4A | Tolerance class (Equivalent to ABEC 7/ISO P4) | Denotes ultra-precision manufacturing for minimal runout and vibration. |
| DT | Duplex Tandem arrangement | Two bearings mounted in tandem to maximize axial load capacity in one direction. |
S7004 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life, which is critical for high-speed bearings.
Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability at high speeds, contributing to the bearing's smooth operation and high limiting speed.
Duplex Tandem (DT) Preload: The two bearings are supplied as a preloaded set. This configuration provides maximum axial stiffness and minimizes axial play, ensuring precise shaft positioning and resistance to combined loads.
Sealed & Grease-Lubricated: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S7004 ACE/HCP4ADT Bearing Typical Application Areas
The S7004 ACE/HCP4ADT is ideally suited for high-performance applications where precision, speed, and rigidity are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other precision machining equipment.
- High-Frequency Motors: Used in spindle motors and other high-RPM electric motors.
- Turbochargers: And other high-speed rotational equipment.
