71911 ACDGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 ACDGA/HCP4AL
Basic Information
System of measurement
Metric
Weight
0.15 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
13 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
4095 lbf
Radial static load rating
3082 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
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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71911 ACDGA/HCP4AL Bearing Product Overview & Core Advantages
The 71911 ACDGA/HCP4AL is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A super-precision tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, facilitated by a 25° contact angle. The use of a phenolic resin cage and ceramic balls contributes to superior high-speed performance, low friction, and extended service life, making it ideal for demanding, high-rigidity spindle systems.
71911 ACDGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
The model number 71911 ACDGA/HCP4AL is decoded as follows:
- 71911: Basic series designation for a high-precision angular contact bearing.
- AC: Angular Contact design.
- D: High contact angle (25°).
- GA: Universal Matchable (SU designation), allowing for precise preload when mounted in pairs or sets.
- /HCP4AL: Combined suffix indicating:
- P4A: Super precision tolerance class (exceeding ABEC 7).
- L: Light preload.
71911 ACDGA/HCP4AL Bearing Structural Features & Performance Benefits
- Ultra-High Precision & Rigidity: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, ensuring minimal runout and superior system rigidity for critical applications.
- High-Speed Capability: The combination of a lightweight phenolic cage and low-density ceramic (Si3N4) balls reduces centrifugal forces, enabling very high limiting speeds (46,000 rpm) with minimal heat generation.
- Optimized Load Capacity: The 25° contact angle is optimized to handle significant axial loads in one direction in addition to radial loads, providing excellent performance under combined loading conditions.
- Universal Matching & Preload: Designated as Universal Matchable (SU), these bearings are supplied in sets of 3, allowing for flexible mounting configurations (back-to-back, face-to-face, or tandem) to achieve the desired preload (Light - L) and system stiffness.
- Extended Service Life: Ceramic balls offer superior wear resistance, lower thermal expansion, and electrical insulation properties compared to steel, significantly enhancing reliability and lifespan.
71911 ACDGA/HCP4AL Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery requiring the utmost precision and speed.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for aerospace and automotive manufacturing.
- Medical Equipment: High-speed dental handpieces and surgical tools.
- Robotics: Precision joints and actuators requiring high rigidity and accuracy.
