S71912 ACE/HCP4ADT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71912 ACE/HCP4ADT
Basic Information
System of measurement
Metric
Weight
0.32 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5648 lbf
Radial static load rating
4950 lbf
Limiting speed
32.5 X 1000 rpm
Lubrication
Grease
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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S71912 ACE/HCP4ADT Bearing Product Overview & Core Advantages
The S71912 ACE/HCP4ADT is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. This duplex tandem (DT) matched set excels at handling combined radial and axial loads in one direction with exceptional accuracy and stability. Featuring a 25° contact angle, ceramic balls, and a phenolic cage, it delivers superior performance, reduced heat generation, and extended service life in precision machinery.
S71912 ACE/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact bearings. |
| 1912 | Standard size designation (Bore: 60mm, OD: 85mm, Width: 26mm). |
| ACE | 25° contact angle and enhanced internal design for optimized load distribution. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for high-speed and longevity. |
| P4A | Ultra-high tolerance class (superior to ABEC 7), ensuring extreme dimensional and running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are matched to handle heavy axial loads in the same direction. |
S71912 ACE/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement provides exceptional axial and radial stiffness, making it ideal for applications requiring high preload and resistance to deflection under heavy combined loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and heat, enabling a high limiting speed of 32,500 rpm.
- Enhanced Durability & Temperature Stability: Hybrid ceramic construction offers improved wear resistance and can operate effectively within a wide temperature range (-30°C to 110°C). The phenolic cage provides excellent dimensional stability under thermal variations.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-precision spindles.
S71912 ACE/HCP4ADT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- High-Frequency CNC Machining Spindles
- Precision Grinding Spindles
- High-speed Robotic Drives and Servo Motors
- Aerospace Instrumentation and Auxiliary Power Units (APUs)
- High-velocity Dental and Medical Handpieces
