7203 ACD/HCP4ADBB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7203 ACD/HCP4ADBB
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
40 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3285 lbf
Radial static load rating
1800 lbf
Limiting speed
121 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7203 ACD/HCP4ADBB Bearing Product Overview & Core Advantages
The 7203 ACD/HCP4ADBB represents a premium class of duplex angular contact ball bearings designed for applications demanding exceptional precision and rigidity. This P4A super-precision bearing is configured in a back-to-back (DB) arrangement as a matched set, enabling it to withstand significant combined radial and axial loads from both directions. The use of ceramic balls and a phenolic cage contributes to superior high-speed performance, reduced friction, and extended service life, making it ideal for high-reliability machinery.
7203 ACD/HCP4ADBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7203 ACD/HCP4ADBB is decoded as follows:
- 7203: Basic series designation for a 17mm bore, 40mm OD angular contact ball bearing.
- A: Signifies a 25° contact angle, optimized for carrying higher axial loads.
- CD: Indicates a duplex bearing in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity.
- HC: Denotes the use of Hybrid Ceramic components, specifically silicon nitride (Si3N4) balls.
- P4A: Specifies a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for applications requiring extreme running accuracy.
- DBB: Confirms the Duplex Back-to-Back preload and matching specification.
7203 ACD/HCP4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and complex combined loads. The 25° contact angle further enhances axial load carrying capability.
- Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and inertial drag, allowing for a very high limiting speed of 121,000 rpm. This setup also minimizes heat generation.
- Precision & Accuracy: Manufactured to P4A super-precision tolerances, this bearing ensures minimal runout and vibration, which is critical for maintaining the accuracy of spindles and other precision components.
- Durability & Reliability: Hybrid ceramic construction offers excellent resistance to wear and provides a longer operational life, especially in demanding environments. The bearing is pre-lubricated for immediate use.
7203 ACD/HCP4ADBB Bearing Typical Application Areas
This high-performance bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and radar systems.
