71912 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71912 CE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.32 kg
Tolerance class
P4A
Seal type
Open
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
31 X 1000 rpm
Lubrication
Lubricated
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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71912 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 71912 CE/HCP4ADBA is a super-precision angular contact ball bearing designed for the most demanding applications. This duplex back-to-back (DB) matched set delivers exceptional rotational accuracy, high system rigidity, and superior high-speed performance. Its core advantage lies in its ability to handle combined radial and axial loads simultaneously, making it ideal for machine tool spindles and other high-precision machinery where ultimate performance is critical. The combination of a phenolic cage and ceramic balls contributes to lower friction, higher limiting speeds, and extended service life.
71912 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation, indicating a super-precision angular contact bearing series with a 60 mm bore, 85 mm OD, and 26 mm width. |
| CE | Indicates a 15° contact angle, optimized for high-speed applications requiring high rigidity. |
| HC | Signifies the use of Hybrid Ceramic balls (Silicon Nitride), which reduce centrifugal forces, lower operating temperatures, and enable higher speeds. |
| P4A | Denotes an ultra-high precision tolerance class (equivalent to ABEC 7/ISO P4), ensuring minimal runout and vibration. |
| DB | Specifies the bearings are supplied as a Duplex Back-to-Back matched set, providing high moment rigidity. |
| A | Indicates an Extra Light (Class A) preload, which is optimal for high-speed operation with minimal deflection. |
71912 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back arrangement creates a rigid bearing system capable of withstanding significant combined loads and moment loads, ensuring stability in precision applications.
- Superior High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and guidance, while the ceramic balls significantly reduce mass and centrifugal force. This combination enables the bearing to achieve a high limiting speed of 31,000 rpm.
- Enhanced Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees minimal runout for superior accuracy. The open design allows for optimal lubrication management, and the hybrid ceramic construction provides increased resistance to wear and a longer operational life.
- Optimized for Precision Systems: The 15° contact angle and light preload are specifically chosen to deliver high rigidity with low heat generation, which is paramount for maintaining accuracy in high-speed spindle applications.
71912 CE/HCP4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
