71904 FE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71904 FE/HCP4ADT Bearing Product Overview & Core Advantages
The 71904 FE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring ultra-high running accuracy and system rigidity. Its ability to handle high combined loads and its optimized design for high-speed operation make it an ideal solution for advanced machinery. The use of a phenolic cage and ceramic balls significantly enhances its performance under extreme conditions.
71904 FE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71904 | Basic bearing series and size designation (20mm bore, 37mm OD). |
| FE | Indicates a specific internal design and contact angle (18°). |
| HC | Signifies Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Denotes a super-precision tolerance class for exceptional dimensional and running accuracy. |
| DT | Specifies a Duplex Tandem matched arrangement, designed to carry heavy axial loads in one direction. |
71904 FE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and 18° contact angle provide superior axial stiffness and enable the bearing set to withstand significant one-direction axial loads and combined loads, making it exceptionally high rigid.
- Enhanced High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic (Si3N4) balls reduces centrifugal forces, allowing for a very high limiting speed of 100,500 rpm. This hybrid design also minimizes heat generation.
- Precision & Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The ceramic balls offer superior wear resistance, lower friction, and extended service life compared to all-steel designs.
- Preload & Stability: Supplied as a preloaded set, these bearings eliminate internal clearance, providing immediate precise rotational accuracy and enhanced system stability under operational loads.
71904 FE/HCP4ADT Bearing Typical Application Areas
The 71904 FE/HCP4ADT is engineered for high-performance applications where precision, speed, and reliability are critical. Key industries and equipment include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Advanced Medical & Dental Equipment
- Aerospace Actuators and Control Systems
- High-Performance Pumps and Compressors
