7002 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7002 ACEGA/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
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
952 lbf
Radial static load rating
412 lbf
Limiting speed
95 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 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 7002 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. This single bearing features a 25° contact angle and is manufactured to P4A tolerance class, ensuring ultra-precise rotational characteristics. Its core advantage lies in its ability to handle combined loads (radial and axial) efficiently while operating at high speeds up to 95,000 rpm. The use of ceramic balls and a phenolic cage contributes to reduced weight, lower friction, and superior performance in demanding conditions.
7002 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7002 ACEGA/HCP4A provides detailed technical specifications:
- 7002: Basic bearing series, indicating a 15mm bore, 32mm OD, and 9mm width.
- A: Denotes a 25° contact angle.
- CE: Indicates the use of Hybrid Ceramic balls (Silicon Nitride).
- GA: Specifies an Extra Light Preload (Class A).
- /HC: Designates a Universal Matchable bearing, allowing for precise duplex set configurations.
- P4A: Identifies the tolerance class, exceeding ABEC 7/ISO P4 precision standards.
7002 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds and extended service life. Ceramic balls are also electrically insulating and highly resistant to wear.
- Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width. This ensures minimal runout and high system rigidity for precise positioning.
- High-Speed Capability: The lightweight phenolic resin cage and optimized 25° contact angle are engineered for stable operation at the high limiting speed of 95,000 rpm.
- Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired with another identical bearing to form a pre-loaded duplex set (e.g., DB, DF, DT), offering flexibility in achieving the required stiffness and load capacity for the application.
7002 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision bearing is ideally suited for:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Handpieces
- Aerospace Instrumentation
- Robotic Arm Joints
