7002 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.027 kg
Tolerance class
P4 (ABEC-7)
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
-0.006mm 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° 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
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 63.09
/ each
In Stock
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7002 CD/HCP4A Bearing Product Overview & Core Advantages
The 7002 CD/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, while also supporting significant radial loads. Its defining features include a P4 (ABEC-7) tolerance class for superior running accuracy, a phenolic resin cage for high-speed capability, and ceramic balls that reduce weight and centrifugal force, enabling higher limiting speeds and reduced operating temperatures. The bearing is preloaded and pre-lubricated, ensuring immediate, reliable performance in demanding environments.
7002 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 7002 | Standard bearing series designation indicating a 15mm bore, 32mm OD, and 9mm width. | Defines the core bearing dimensions. |
| C | Specifies a 15° contact angle. | Optimized for high-speed operation and thrust load capacity. |
| D | Indicates the bearing is supplied with a preload. | Enhances system rigidity and minimizes axial/radial runout. |
| HC | Signifies Hybrid Ceramic construction (steel rings with ceramic balls). | Reduces friction and heat generation, increases limiting speed and service life. |
| P4 | Denotes a super-precision tolerance class (equivalent to ABEC-7). | Ensures extremely low vibration and noise for high-precision applications. |
7002 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides superior performance. Ceramic balls are lighter, harder, and have a lower coefficient of thermal expansion than steel, which significantly reduces centrifugal loading and operating temperature, directly contributing to the high limiting speed of 100,000 rpm.
- Phenolic Resin Cage: The lightweight and robust phenolic cage (often designated as TN9-type) offers excellent dimensional stability and low friction at high speeds, further supporting the bearing's high-speed performance.
- 15° Contact Angle & Preload: The optimized contact angle is ideal for handling high thrust loads. The factory-applied preload eliminates internal clearance, resulting in greater stiffness, precise shaft positioning, and reduced non-repetitive runout.
- Super-Precision Tolerances: Manufactured to P4 tolerance class, this bearing guarantees minimal dimensional variation and superior running accuracy, which is critical for applications requiring high rotational precision.
7002 CD/HCP4A Bearing Typical Application Areas
This high-performance angular contact ball bearing is ideally suited for advanced machinery where speed, precision, and reliability are paramount.
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and grinding spindles.
- Precision Instrumentation: Medical and laboratory equipment, optical scanners, and coordinate measuring machines.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- High-Performance Robotics: Joints and actuators in high-speed, high-accuracy robotic arms.
