71915 ACB/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71915 ACB/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.69 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
34
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4860 lbf
Radial static load rating
5625 lbf
Limiting speed
22 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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71915 ACB/HCP4ADT Bearing Product Overview & Core Advantages
The 71915 ACB/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex tandem (DT) matched set is preloaded and manufactured to the stringent P4A tolerance class, ensuring superior running accuracy and system rigidity. Its primary advantage lies in its ability to handle high combined loads (radial and axial) in one direction, making it an ideal solution for high-speed spindles and precision machinery where maximum stiffness and minimal runout are critical. The use of ceramic balls further enhances its capabilities, reducing centrifugal forces and enabling higher operational speeds.
71915 ACB/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation, indicating a metric, high-precision series angular contact ball bearing. |
| ACB | Indicates a specific contact angle of 25° and a specific internal design optimized for high rigidity and speed. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| P4A | Denotes a very high tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| DT | Specifies the Duplex Tandem mounting arrangement. Two bearings are matched and preloaded to act as a single unit, significantly increasing axial load capacity in one direction. |
71915 ACB/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and 25° contact angle create an exceptionally rigid bearing system capable of supporting high radial loads and very high unidirectional axial loads. This configuration is essential for applications where shaft displacement must be minimized.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and hybrid ceramic balls (silicon nitride) drastically reduces rotating mass and centrifugal forces. This allows for a higher limiting speed (22,000 rpm), reduced friction, and lower operating temperatures compared to all-steel bearings.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is paramount for achieving high surface finishes and positional accuracy in precision equipment.
- Pre-Lubricated & Open Design: The bearing comes pre-lubricated for immediate operation. The open seal type allows for optimal lubrication management in complex systems, enabling the use of specialized oil-mist or oil-jet lubrication for maximum performance and heat dissipation.
71915 ACB/HCP4ADT Bearing Typical Application Areas
This high-performance bearing is engineered for the most demanding applications across various industries:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision, rigidity, and speed are critical.
- Precision Robotics: High-accuracy robotic arms and CNC machinery requiring minimal deflection and high dynamic response.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring the ultimate in precision and reliability.
- High-Frequency Motors & Spindles: Motors for PCB drilling, dental handpieces, and other applications demanding extreme rotational speeds.
