S7004 CEGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7004 CEGB/P4A Bearing Product Overview & Core Advantages
The S7004 CEGB/P4A is a single-row angular contact ball bearing designed for applications demanding the highest levels of precision and performance. Engineered to a super-precision P4A tolerance class, it is optimized to accommodate combined loads—simultaneous radial and axial loads—with exceptional accuracy and stability. Its key advantages include high operational rigidity, superior running accuracy, and the ability to perform at high speeds, making it an ideal choice for high-reliability, precision machinery. The bearing is preloaded and part of a universally matchable (SU) set, allowing for precise axial clearance control when mounted with other bearings from the same set.
S7004 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 12mm width). | Defines the core dimensions and series for high-precision applications. |
| C | 15° nominal contact angle. | Optimized for handling axial loads and providing high rigidity. |
| E | Optimized internal geometry and high-precision design. | Enhances speed capability and reduces noise and vibration. |
| GB | Preloaded (Light preload). | Increases system rigidity, minimizes axial and radial runout for superior precision. |
| P4A | Tolerance class equivalent to ABEC 7 (Super Precision). | Guarantees extremely tight dimensional and running accuracy tolerances. |
S7004 CEGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The 15° contact angle and light preload (GB) work in concert to provide high axial and radial rigidity, ensuring minimal deflection under load and exceptional positional accuracy. This is critical for maintaining precision in demanding applications.
Superior Load Capacity: The optimized internal geometry allows the bearing to support significant combined loads (simultaneous radial and one-direction axial loads) effectively, with a dynamic load rating of 1667 lbf and a static load rating of 754 lbf.
High-Speed Performance: The lightweight, durable phenolic resin cage ensures excellent dimensional stability and low friction, contributing to the high limiting speed of 100,000 rpm. The optimized internal design (suffix E) further enhances high-speed capability.
Precision Materials: Manufactured from high-grade chrome steel for both rings and balls, the bearing offers high hardness, wear resistance, and long-term dimensional stability.
S7004 CEGB/P4A Bearing Typical Application Areas
The S7004 CEGB/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Arm joints and high-accuracy servo motors.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical and Dental Equipment: High-speed handpieces and scanners.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
