71912 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71912 ACE/HCP4ADGA
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
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
33 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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71912 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71912 ACE/HCP4ADGA is a super-precision angular contact ball bearing engineered for the most demanding high-speed and high-rigidity applications. As a universal matchable (SU) bearing supplied in a set of two, it is designed to accommodate combined loads (radial and axial) simultaneously. Its construction with a ceramic ball and phenolic cage enables exceptional limiting speeds and thermal stability, making it ideal for high-precision spindles where reliability is paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation (60mm bore, 85mm OD). |
| ACE | 25° contact angle and enhanced internal design for high-speed operation. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for reduced friction and higher speed capability. |
| P4A | The tolerance class, denoting extremely high precision levels for running accuracy. |
| DGA | Universal Matchable (SU) arrangement. Two bearings are universally matchable and can be mounted in any combination to achieve the required preload. |
71912 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matching of two bearings create a highly rigid system capable of supporting significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls minimizes centrifugal forces, enabling a very high limiting speed of 33,000 rpm.
- Exceptional Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration for ultra-precise rotational accuracy.
- Thermal Stability & Longevity: The hybrid ceramic construction reduces heat generation and provides excellent performance across a wide temperature range (-30°C to 110°C). The bearings are pre-lubricated for immediate operation.
71912 ACE/HCP4ADGA Bearing Typical Application Areas
This super-precision bearing is ideally suited for applications requiring the highest levels of speed and accuracy, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Spindles for PCB drilling and routing
- High-frequency Main Shafts
- Advanced Robotic Drives
