7002 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 CE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.05 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
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1609 lbf
Radial static load rating
855 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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7002 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 7002 CE/HCP4ADBA is a high-precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This metric bearing features a back-to-back (DB) matched arrangement, providing superior rigidity and the ability to withstand combined radial and axial loads. Manufactured to a P4A tolerance class with a 15° contact angle and ceramic balls, it is engineered for high-speed operation and long service life in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Basic bearing series and size designation (15mm bore, 32mm OD). |
| C | Designates a 15° contact angle. |
| E | Indicates optimized internal design for enhanced performance. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Denotes high precision tolerance class (superior to ABEC 7). |
| DB | Specifies a Duplex Back-to-Back pre-set matched arrangement. |
| A | Indicates an Extra Light preload. |
7002 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and supports combined loads from any direction.
- Ultra-High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces, enabling a high limiting speed of 140,000 rpm. The low coefficient of thermal expansion of ceramic also minimizes preload variation at high speeds.
- Exceptional Precision: Manufactured to P4A tolerance class with tight dimensional control on bore diameter, outside diameter, and width, ensuring minimal runout and superior rotational accuracy.
- Reduced Friction & Wear: Ceramic balls are harder, smoother, and lighter than steel, leading to lower operating temperatures, less energy consumption, and extended bearing service life.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated from the factory, ready for installation and operation within its specified temperature range.
7002 CE/HCP4ADBA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Dental and Medical Handpieces
- Aerospace Instrumentation and Gyroscopes
- Semiconductor Manufacturing Equipment
