S7004 FEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7004 FEGA/HCP4A Bearing Product Overview & Core Advantages
The S7004 FEGA/HCP4A is a high-precision, single-row angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Its defining characteristic is the universal matching (SU designation) capability, allowing bearings to be supplied in pre-matched sets of four for simplified installation and optimal performance in duplex arrangements. Manufactured to the stringent P4A tolerance class, this bearing offers superior running accuracy. The combination of a ceramic ball material and a phenolic cage enables outstanding high-speed performance and reduced rotational inertia. It is pre-lubricated with grease and sealed for long-term, maintenance-free operation, making it ideal for high-reliability, high-rigidity applications.
S7004 FEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance & Advantage |
|---|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 12mm width). | Defines the core bearing dimensions and internal geometry. |
| FE | Precision design features, including optimized internal geometry. | Enhances high-speed capability and reduces noise and vibration. |
| GA | Universal Matchable bearing set designation. | Bearings can be universally paired in any combination (DB, DF, DT) to achieve the required preload and rigidity. |
| HC | Hybrid Ceramic construction (Steel rings with Silicon Nitride (Si3N4) balls). | Provides higher speed, longer life, reduced weight, and electrical insulation compared to all-steel bearings. |
| P4A | Tolerance class, a subset of ABEC 7/ISO P4 with enhanced accuracy on width and preload deviation. | Ensures exceptional dimensional and running accuracy, critical for precision bearing applications in spindles. |
S7004 FEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of silicon nitride ceramic balls significantly reduces centrifugal forces and friction, enabling a higher limiting speed (100,000 rpm dmN value). This material combination also offers increased stiffness and superior performance in lubricant-starved conditions.
Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to the high-speed capability by offering excellent strength-to-weight ratio and smooth operation under high acceleration.
Universal Matching (SU): This feature allows for simplified assembly of bearing sets. The four bearings in a set are manufactured to universal specifications, ensuring consistent preload and high rigidity when mounted in pairs.
Extra Light Preload (Class A): The bearing is supplied with a minimal preload, which is ideal for high-speed applications where low running torque and heat generation are critical, while still providing sufficient rigidity.
Sealed & Grease Lubricated: The integral seals retain the high-performance grease and protect against contamination, resulting in a maintenance-free and long-service-life solution.
S7004 FEGA/HCP4A Bearing Typical Application Areas
The S7004 FEGA/HCP4A is engineered for the most demanding high-speed and high-precision machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC routers and engraving machines.
- Aerospace & Defense Systems: Gyroscopes, instrumentation, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and surgical tools.
