71903 CE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71903 CE/HCP4ADT Bearing Product Overview & Core Advantages
The 71903 CE/HCP4ADT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set delivers superior axial rigidity and is preloaded for immediate, precise operation. Manufactured to the exacting P4A tolerance class, it features a ceramic ball and phenolic cage construction, enabling high-speed operation up to 80,000 rpm while maintaining dimensional stability under significant combined loads. Its compact design, with a 17mm bore and 30mm outside diameter, makes it ideal for space-constrained, high-reliability systems.
71903 CE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71903 | Basic bearing series and size designation (17mm bore, 30mm OD) | Defines the core bearing dimensions. |
| CE | Contact angle of 15° | Optimized for handling substantial axial loads in one direction. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduces centrifugal forces, enabling higher speeds, lower friction, and longer service life. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for precision bearing applications. |
| DT | Duplex Tandem Arrangement | Two bearings are mounted together to share the load and provide maximum axial rigidity in one direction. |
71903 CE/HCP4ADT Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls with a chrome steel ring significantly reduces weight and inertial forces, which is critical for achieving the high limiting speed of 80,000 rpm. This construction also offers improved resistance to wear and thermal deformation.
Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds and provides excellent dimensional stability in the presence of lubrication and heat.
Duplex Tandem Preload: The bearings are supplied as a matched set with a preload applied. This eliminates internal clearance, resulting in high rigidity, precise shaft positioning, and improved system response.
Superior Load Capacity: With a 15° contact angle and tandem configuration, this set is engineered to handle heavy combined loads, particularly thrust loads in one direction, making it exceptionally high rigid.
71903 CE/HCP4ADT Bearing Typical Application Areas
This high-performance bearing set is ideally suited for applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and flight control mechanisms.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
