S71912 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71912 CE/HCP4ADBA
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
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5962 lbf
Radial static load rating
5310 lbf
Limiting speed
32.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
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
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S71912 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71912 CE/HCP4ADBA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a duplex back-to-back (DB) matched set, it delivers exceptional rotational accuracy and stability. Its core advantages stem from its ability to support combined loads (simultaneous radial and axial loads), its ceramic ball construction for reduced centrifugal forces and thermal expansion, and its P4A tolerance class for superior running accuracy. This configuration is engineered for high reliability in precision machinery where minimal runout and maximum stiffness are critical.
S71912 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| 719 | High-Precision Angular Contact Bearing Series | Optimized for high-speed operation and precise running. |
| C | 15° Contact Angle | Balanced capacity for radial and axial loads. |
| E | Optimized Internal Design | Enhanced performance and load rating. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Higher speed capability, reduced weight, and longer service life. |
| P4A | Super Precision Tolerance Class (ABEC 7 / ISO P4) | Guarantees extremely tight dimensional and running accuracy for critical applications. |
| DB | Duplex Back-to-Back Arrangement (2 bearings) | Provides high rigidity and can withstand moment loads. |
| A | Extra Light Preload | Minimizes friction and heat generation, ideal for very high speeds. |
S71912 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists overturning moments, making it ideal for spindle applications.
- Superior High-Speed Performance: The combination of hybrid ceramic balls (lighter than steel, reducing centrifugal forces) and a phenolic resin cage (excellent strength-to-weight ratio and low friction) enables the high limiting speed of 32,500 rpm.
- Exceptional Precision and Accuracy: Manufactured to P4A super precision tolerances with a bore and outside diameter tolerance of -0.004mm to 0, ensuring minimal runout and vibration for superior finish and accuracy in machining.
- Optimized Load Handling: The 15° contact angle provides a balanced capacity to handle combined radial and axial loads simultaneously.
- Sealed & Grease-Lubricated: The sealed design with pre-applied grease lubrication protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S71912 CE/HCP4ADBA Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications requiring maximum speed and precision, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
