S7004 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7004 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The S7004 ACE/HCP4ADGA is a high-precision, sealed angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Engineered with a 25° contact angle and P4A super-precision tolerance, this bearing excels at handling combined radial and axial loads simultaneously. Its Extra Light preload (Class A) ensures minimal runout and smooth operation, while the ceramic balls and phenolic cage contribute to superior high-speed performance, with a limiting speed of 100,000 rpm. The integrated seals and pre-applied grease provide a maintenance-free, long-service-life solution, making it ideal for compact, high-rigidity arrangements.
S7004 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7004 | Bearing series and size designation (20mm bore, 42mm OD, 24mm width) | Defines the core bearing dimensions and series. |
| ACE | 25° contact angle, Phenolic cage, High precision | Specifies the contact angle and cage material optimized for high-speed operation. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Indicates the use of ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | Super Precision Tolerance Class | Denotes extremely tight dimensional and running accuracy for high-precision applications. |
| DGA | Sealed on both sides, Grease lubricated | Ensures contamination protection and maintenance-free operation with pre-applied grease. |
S7004 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces rotational mass and friction, enabling higher limiting speeds, reduced operating temperatures, and extended service life compared to all-steel bearings.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance for the ceramic balls, contributing to smooth and quiet operation at ultra-high speeds.
Super-Precision P4A Tolerance: Manufactured to the strictest P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications demanding the highest levels of rotational accuracy and system rigidity.
Sealed & Greased for Life: The integrated contact seals effectively shield the bearing internals from contaminants. Pre-lubricated with high-performance grease, the S7004 ACE/HCP4ADGA is a ready-to-install, maintenance-free component suitable for its entire operational temperature range (-30°C to 110°C).
Universal Matchable (SU) Design: This bearing is universally matchable, allowing two bearings to be paired in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without selective mounting, simplifying installation and ensuring optimal preload and stiffness.
S7004 ACE/HCP4ADGA Bearing Typical Application Areas
The S7004 ACE/HCP4ADGA is engineered for the most demanding high-speed and high-precision machinery, including:
- High-Frequency CNC Machining Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation Arms
- Dental and Medical Handpiece Drives
- Aerospace Actuators and Instrumentation
- High-Performance Electric Motors
