7003 ACD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7003 ACD/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
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2385 lbf
Radial static load rating
1395 lbf
Limiting speed
115 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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7003 ACD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7003 ACD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle and universal matchable (SU) design, allowing for flexible mounting configurations in preloaded sets. Its construction with ceramic balls and P4A super-precision tolerance ensures superior high-speed capability, minimal heat generation, and extended service life in critical machinery.
Model Code Breakdown
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle |
| D | High-Precision (P4A) tolerance class |
| HCP4A | Hybrid Ceramic (Silicon Nitride) balls with P4A precision |
| DGA | Universal Matchable (SU) bearing pair, preloaded for high rigidity |
7003 ACD/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (115,000 rpm) and improved performance in high-temperature environments.
- Phenolic Cage: Provides excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
- Super-Precision P4A Tolerance: Ensures extremely tight dimensional and running accuracy, making it ideal for applications requiring minimal runout and high positional accuracy.
- Universal Matchable (SU) Design: Allows two bearings to be mounted in a back-to-back, face-to-face, or tandem arrangement without selective shimming, simplifying installation and providing optimal rigidity and load distribution.
- Extra Light Preload (Class A): Provides controlled internal clearance for precise shaft positioning and reduced deflection under load, enhancing machine tool accuracy.
7003 ACD/HCP4ADGA Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Robotics: Articulated arms and high-accuracy positioning systems
- Medical Equipment: Dental handpieces, surgical tools, and imaging devices
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision stages
