7002 CEGA/HCPA9A
Hybrid Ceramic Super Precision Bearings
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7002 CEGA/HCPA9A Bearing Product Overview & Core Advantages
The 7002 CEGA/HCPA9A is a single row angular contact ball bearing engineered for exceptional precision and performance in demanding applications. This high-precision bearing is distinguished by its ceramic balls and Phenolic resin cage, enabling superior high-speed capabilities and reduced rotational mass. Its extra light preload (Class A) ensures minimal running torque and high rotational accuracy, making it ideal for spindle applications requiring extreme precision and rigidity. As a universally matchable (SU) bearing, it can be paired with another identical bearing to form a back-to-back (DB) or face-to-face (DF) arrangement, providing excellent stability under combined loads.
7002 CEGA/HCPA9A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7002 | Basic bearing series and size designation | 15 mm bore, 32 mm OD, 9 mm width |
| CE | Hybrid Ceramic Balls | Silicon Nitride (Si3N4) balls for higher speed, lower friction, and longer service life |
| GA | Light Preload | Class A preload for high precision and rigidity |
| HCPA9A | High Precision Tolerance & Cage Design | PA9A tolerance class (super precision) with Phenolic resin cage for high-speed operation |
7002 CEGA/HCPA9A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling limiting speeds up to 127,000 rpm. This design also provides electrical insulation and superior performance in high-temperature environments.
High-Speed Phenolic Cage: The Phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at ultra-high speeds, contributing to the bearing's exceptional dynamic performance.
Precision Engineering: Manufactured to PA9A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring consistent high-precision performance and reliable operation in critical applications.
Optimized Contact Angle: The 15° contact angle provides an ideal balance between radial and axial load capacity, making it suitable for applications requiring combined load support.
Universal Matching Capability: As an SU classification bearing, it can be universally matched with another identical bearing, allowing for flexible mounting arrangements to achieve optimal system stiffness and load distribution.
7002 CEGA/HCPA9A Bearing Typical Application Areas
Machine Tool Spindles: High-speed machining centers, CNC milling machines, and grinding spindles requiring extreme precision and rigidity
Precision Medical Equipment: Dental handpieces, surgical tools, and laboratory instrumentation demanding high rotational accuracy
Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units where reliability and precision are critical
High-Speed Automation: Robotics, pick-and-place systems, and semiconductor manufacturing equipment requiring rapid acceleration and deceleration
Professional Power Tools: High-frequency spindles and precision drilling equipment where speed and accuracy are essential
