7000 CEGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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7000 CEGB/HCP4A Bearing Product Overview & Core Advantages
The 7000 CEGB/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and speed. As a single bearing from a Universal Matchable (SU) pair, it excels in handling combined loads—simultaneously supporting significant radial loads and axial loads in one direction. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational mass. Manufactured to the stringent P4A tolerance class, this bearing is engineered for high rigidity and operational reliability in the most demanding precision machinery.
7000 CEGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7000 | Basic series number | Defines the standard bearing dimensions: 10mm bore, 26mm OD, 8mm width. |
| C | 15° Contact Angle | Optimized for high-speed applications with a balanced axial load capacity. |
| E | Optimized Internal Design | Enhanced internal geometry for improved performance and load rating. |
| GB | Light Preload (Class B) | Provides high rigidity and reduces deflection under load, ideal for precision applications. |
| HC | Hybrid Ceramic | Silicon Nitride (Si3N4) ceramic balls for lower density, reduced friction, and higher limiting speed. |
| P4A | Tolerance Class | Exceeds ABEC 7 precision, ensuring extremely tight dimensional and running accuracy for high-precision spindles. |
7000 CEGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls within a chrome steel ring structure significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially at very high speeds. This makes it an exceptional high-speed bearing.
Phenolic Resin Cage (RN): The lightweight and robust phenolic cage contributes to smooth operation at the limiting speed of 95,000 rpm, providing excellent dimensional stability and strength.
Light Preload (GB): The bearing is supplied with a controlled light preload, which eliminates internal clearance. This results in superior stiffness and precise rotational accuracy, critical for minimizing runout in machining applications.
Universal Matching (SU): As a single bearing from a universally matchable set, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to handle complex combined loads and moments.
Open Seal & Lubrication: The open design allows for custom lubrication schemes but requires a clean operating environment. It is supplied pre-lubricated for immediate operation.
7000 CEGB/HCP4A Bearing Typical Application Areas
The 7000 CEGB/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar systems.
- Medical Equipment: High-speed dental handpieces and surgical tools.
