71920 ACE/HCPA9ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71920 ACE/HCPA9ADT
Basic Information
System of measurement
Metric
Weight
1.3 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
100 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13612 lbf
Radial static load rating
13500 lbf
Limiting speed
15 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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71920 ACE/HCPA9ADT Bearing Product Overview & Core Advantages
The 71920 ACE/HCPA9ADT is a precision angular contact ball bearing designed for demanding applications requiring high speed and rigidity. This duplex tandem (DT) matched set is preloaded and ready for installation, offering exceptional performance in handling combined radial and axial loads. Manufactured to a PA9A tolerance class with a 25° contact angle and featuring ceramic balls and a phenolic cage, it is engineered for superior high-speed operation, thermal stability, and long service life in precision machinery.
71920 ACE/HCPA9ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation. |
| ACE | Indicates a 25° contact angle and enhanced internal design for high-speed operation. |
| HC | Signifies the use of hybrid ceramic balls (silicon nitride). |
| PA9A | Denotes the high-precision tolerance class, ensuring minimal runout and superior rotational accuracy. |
| DT | Identifies the bearing as a Duplex Tandem preloaded pair, designed to handle high axial loads in one direction. |
71920 ACE/HCPA9ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement provides a rigid, preloaded assembly capable of supporting significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 15,000 rpm and lower operating temperatures.
- Precision Engineering: Manufactured to PA9A tolerance standards with a consistent 25° contact angle, ensuring smooth, accurate, and quiet operation essential for precision applications.
- Extended Service Life: Hybrid ceramic construction offers excellent wear resistance, electrical insulation, and the ability to operate with minimal lubrication, enhancing reliability.
71920 ACE/HCPA9ADT Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Actuation Systems
- High-Speed Pumps and Compressors
