7003 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7003 CDGB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.033 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
35 mm
Outside diameter tolerance
-0.004mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
731 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
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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In Stock
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7003 CDGB/HCP4A Bearing Product Overview & Core Advantages
The 7003 CDGB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and reliability. This single bearing with a light preload (Class B) is designed to handle combined loads, offering superior performance in high-speed operations. Its construction with a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and extended service life, making it ideal for precision machinery where rigidity and minimal thermal expansion are critical.
7003 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Standard bearing series designation indicating dimensions: 17mm bore, 35mm OD, 10mm width. |
| C | 15° contact angle, optimized for combined radial and axial loads. |
| DGB | Universal Matchable (SU) bearing, designed to be paired in sets (3 bearings in this case) for precise preload and alignment. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | High-precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
7003 CDGB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 121,000 rpm. This design is inherently more resistant to wear and electrical arcing.
- Precision & Rigidity: Manufactured to P4A tolerance class with a light preload, this bearing delivers high running accuracy and system stiffness, minimizing deflection under load for superior positional control.
- Optimized for High-Speed: The lightweight phenolic cage ensures excellent stability and guidance at ultra-high speeds, while the 15° contact angle provides an ideal balance between radial and axial load capacity.
- Universal Matching: As a Universal Matchable (SU) bearing, it can be supplied in pre-matched sets (3 bearings) to achieve a defined preload without selective mounting, simplifying installation and ensuring consistent performance.
7003 CDGB/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Semiconductor Manufacturing Equipment
- Aerospace Instrumentation and Gyroscopes
