7002 FEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 FEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.025 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
15 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
32 mm
Outside diameter tolerance
-0.004mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
18 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
981 lbf
Radial static load rating
428 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7002 FEGA/HCP4A Bearing Product Overview & Core Advantages
The 7002 FEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This single bearing features an Extra Light (Class A) preload and is manufactured to P4A super-precision tolerance, ensuring minimal runout and vibration. Its ceramic balls and phenolic resin cage contribute to superior high-speed capability, with a limiting speed of 121,000 rpm. The bearing is universally matchable (SU), allowing for precise axial play adjustment when paired with another bearing, making it ideal for high-rigidity applications requiring superior rotational accuracy.
7002 FEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| FE | Precision Machined Brass Cage (typically for this series) | Provides high strength and stability at ultra-high speeds. |
| GA | Contact Angle of 18° | Optimized for handling combined radial and axial loads. |
| HC | Hybrid Ceramic (Silicon Nitride) Balls | Reduces weight, lowers friction, and enables higher speeds and longer service life. |
| P4A | Super Precision Tolerance Class | Guarantees extreme dimensional and running accuracy for the most demanding applications. |
7002 FEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling exceptional high-speed performance up to 121,000 rpm. This also provides non-conductive properties and enhanced durability.
- Precision Phenolic Cage: The phenolic resin cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced heat generation.
- Super-Precision P4A Tolerance: Manufactured to the tightest tolerance class, this bearing ensures minimal radial and axial runout, which is critical for applications requiring supreme rotational accuracy and low vibration.
- Optimized Contact Angle: The 18° contact angle is engineered to efficiently support combined loads, providing a balance between radial load capacity and axial thrust capacity.
- Universal Matching (SU): As a universally matchable bearing, it can be paired with another identical bearing in various arrangements (back-to-back, face-to-face, or tandem) to achieve the desired preload and stiffness for the application.
7002 FEGA/HCP4A Bearing Typical Application Areas
This bearing is engineered for the most demanding high-speed and high-precision machinery, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Aerospace & Defense Instrumentation
- Semiconductor Manufacturing Equipment
