71911 ACE/HCP4AH1DT
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 ACE/HCP4AH1DT
Basic Information
System of measurement
Metric
Weight
0.29 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 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
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5355 lbf
Radial static load rating
4500 lbf
Limiting speed
46 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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71911 ACE/HCP4AH1DT Bearing Product Overview & Core Advantages
The 71911 ACE/HCP4AH1DT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed capability and rigidity. This duplex tandem (DT) arrangement consists of two preloaded bearings, enabling it to handle significant axial loads in one direction with superior stability. Manufactured to the stringent P4A tolerance class, it offers extremely tight dimensional and running accuracy. The combination of a phenolic resin cage and ceramic balls contributes to its outstanding high-speed performance, low heat generation, and extended service life, making it ideal for high-reliability, precision machinery.
71911 ACE/HCP4AH1DT Bearing Model Code Explained, Specifications & Naming Convention
The model number 71911 ACE/HCP4AH1DT provides detailed technical specifications:
- 71911: Basic series and size designation (55mm bore, 80mm OD, 26mm width).
- ACE: Internal design code, typically indicating a 25° contact angle and optimized internal geometry.
- HC: Indicates the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4A: Denotes a super-precision tolerance class exceeding ABEC 7/ISO P4 standards.
- H1: Specifies a specific preload level for the matched set.
- DT: Duplex Tandem arrangement, where two bearings are mounted together to increase axial load capacity in one direction.
71911 ACE/HCP4AH1DT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem (DT) arrangement and 25° contact angle create a highly rigid system capable of withstanding heavy axial loads. The preload eliminates internal clearance, ensuring precise shaft positioning and minimal deflection under load.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic (Si3N4) balls significantly reduce centrifugal forces, allowing for a high limiting speed of 46,000 rpm. This hybrid construction also minimizes friction and heat buildup.
- Enhanced Durability and Longevity: Ceramic balls are harder, smoother, and lighter than steel, leading to reduced wear, higher stiffness, and longer service life. They are also electrically insulating and resistant to corrosion.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining accuracy in high-speed spindles and other precision applications.
71911 ACE/HCP4AH1DT Bearing Typical Application Areas
This bearing is engineered for high-performance applications where speed, precision, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy actuators.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Advanced Pumps and Compressors: For handling high rotational speeds with reliability.
