7003 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7003 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.066 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
20 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
2498 lbf
Radial static load rating
1474 lbf
Limiting speed
103 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
No drawings available at the moment, will be launched soon
In Stock
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7003 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7003 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (radial and axial loads simultaneously), its universal matchable (SU) design allows for flexible mounting arrangements in preloaded sets. Featuring a P4A tolerance class and ceramic balls, it delivers superior high-speed capability, reduced friction, and extended service life, making it ideal for high-reliability machinery.
7003 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7003 | Basic bearing series, indicating a 17 mm bore, 35 mm OD, and 20 mm width. |
| CD | Specifies a 15° contact angle and a universal matchable (SU) design, allowing bearings to be mounted in pairs in any combination (face-to-face, back-to-back, or tandem) to achieve the required preload and rigidity. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride), which provide benefits such as lower density, higher stiffness, reduced heat generation, and extended service life, especially in high-speed applications. |
| P4A | Denotes an ultra-high precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy for applications demanding minimal runout and vibration. |
| DGA | Signifies a Phenolic (cellulose fiber reinforced) cage. This cage material is lightweight, offers excellent strength and wear resistance, and is ideal for high-speed operation due to its favorable strength-to-weight ratio and compatibility with various lubricants. |
7003 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 15° contact angle and the ability to be mounted in preloaded sets (Universal Matchable) provides high system rigidity, enabling the bearing to effectively handle combined radial and axial loads.
- Exceptional High-Speed Performance: The combination of Hybrid Ceramic balls (lower density reduces centrifugal forces) and a lightweight Phenolic cage (DGA) allows for a very high limiting speed of 103,000 rpm, making it suitable for ultra-high-speed spindles.
- Ultra-Precision Operation: Manufactured to a P4A tolerance class, this bearing guarantees minimal running vibration and superior rotational accuracy, which is critical for applications like machine tool spindles.
- Optimized for Preload: The Universal Matchable (SU) designation and Extra Light preload (Class A) mean these bearings are supplied ready to be paired, simplifying the assembly of high-precision, preloaded bearing systems that require defined axial rigidity and minimal deflection.
7003 CD/HCP4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation instruments.
