7002 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 CDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.027 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
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1170 lbf
Radial static load rating
551 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7002 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 7002 CDGB/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and high-speed performance. As a single bearing designed for universal matching (SU), it can be mounted in pairs (back-to-back, face-to-face, or tandem) to create a rigid, preloaded system capable of handling combined loads. Its defining features include a P4A super-precision tolerance class, a light preload (Class B), and a 15° contact angle, making it ideal for high-rigidity, high-speed spindles and other precision machinery where rotational accuracy is paramount.
7002 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7002 | Standard bearing series designation, indicating a 15mm bore, 32mm OD, and 9mm width. |
| C | Specifies a 15° contact angle. |
| DGB | Indicates a Universal Matchable (SU) bearing. Two bearings can be paired to achieve a specific preload without selective mounting. |
| HC | Refers to the hybrid ceramic construction, featuring steel rings and ceramic balls (Silicon Nitride). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for exceptional running accuracy. |
7002 CDGB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This construction allows for higher limiting speeds (up to 100,000 rpm with grease lubrication), provides electrical insulation, and extends service life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at very high speeds, contributing to the bearing's excellent high-speed performance and low vibration levels.
- Precision & Rigidity: Manufactured to P4A tolerance class and supplied with a light preload (Class B), this bearing delivers superior rotational accuracy and system rigidity, minimizing deflection under load.
- Universal Matching: The SU universal matching designation allows for simplified installation and optimal performance when mounted in pairs, ensuring consistent preload and stiffness.
- Open Seal & Pre-lubrication: The open seal design minimizes torque for maximum speed, while the bearing is pre-lubricated with a high-performance grease suitable for a wide temperature range of -30°C to 110°C.
7002 CDGB/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving, and semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM electric motors.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Instrumentation: Gyroscopes, navigation systems, and other critical precision mechanisms.
