71903 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71903 ACE/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.028 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
30 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1170 lbf
Radial static load rating
652 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
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
Price available upon request.
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71903 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The 71903 ACE/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement bearing set offers superior high rigidity and is capable of handling high axial loads in one direction. Manufactured to an ultra-precise P4A tolerance class, it ensures excellent running accuracy and is optimized for high-speed operation, making it ideal for high-precision and high-reliability machinery.
71903 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACE | 25° contact angle and enhanced internal design. |
| HC | Hybrid Ceramic: Features ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4A | Ultra-high precision tolerance class, exceeding ABEC 7 standards. |
| DT | Duplex Tandem arrangement. Two bearings are mounted together to share axial loads in the same direction. |
71903 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The duplex tandem arrangement provides exceptional stiffness and is specifically designed to withstand very high unidirectional axial loads, making the assembly highly resistant to deflection under load.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 121,000 rpm. This design minimizes heat generation and power loss.
- Precision and Longevity: Manufactured to P4A tolerance with a 25° contact angle, this bearing ensures smooth, quiet, and accurate operation. The preload is applied to eliminate internal clearance, enhancing system rigidity and rotational accuracy from startup.
- Optimized for Performance: The open seal type allows for optimal lubrication flow and is suitable for systems with centralized lubrication, ensuring consistent performance across its operating temperature range.
71903 ACE/HCP4ADT Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Routers and PCB Drilling Machines
- Advanced Medical and Dental Equipment
- Aerospace Instrumentation and Gyroscopes
