7002 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 ACE/HCP4ADGA
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
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1550 lbf
Radial static load rating
821 lbf
Limiting speed
95 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7002 ACE/HCP4ADGA is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This metric bearing features a universal matchable (SU) design, allowing two bearings to be paired in various configurations to optimize preload and rigidity. Its core advantages include the ability to handle combined radial and axial loads efficiently, thanks to its 25° contact angle. Manufactured to P4A tolerance class with a phenolic cage and ceramic balls, it delivers superior high-speed capability, low friction, and extended service life in demanding operational environments.
7002 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7002 ACE/HCP4ADGA breaks down as follows:
- 7002: Basic series designation, indicating a 15mm bore and 32mm outside diameter.
- ACE: Signifies Angular Contact design with a 25° contact angle.
- HC: Indicates the use of Hybrid Ceramic balls (Silicon Nitride).
- P4A: Denotes a super-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
- DGA: Specifies a Universal Matchable (SU) arrangement. Two bearings are supplied as a matched set for precise preload control.
7002 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear. This results in higher limiting speeds, longer lubricant life, and improved reliability, especially in high-speed applications.
- Precision Phenolic Cage: The lightweight and robust phenolic resin cage provides excellent dimensional stability and guidance at high rotational speeds, contributing to smooth operation and reduced vibration.
- Super-Precision P4A Tolerances: With bore, outside diameter, and width tolerances held to extremely tight limits, this bearing ensures minimal runout and superior rotational accuracy, which is critical for high-precision spindles.
- Universal Matchable Design (SU): This feature allows two bearings to be mounted in a back-to-back, face-to-face, or tandem arrangement. This versatility enables engineers to achieve the exact level of preload (Extra light / Class A) and system rigidity required for the application.
7002 ACE/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors and Spindles: Used in PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
- Medical Equipment: Centrifuges and advanced diagnostic imaging devices.
