S71911 ACB/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71911 ACB/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.36 kg
Tolerance class
P4A
Seal type
Sealed
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
5.556 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3442 lbf
Radial static load rating
3442 lbf
Limiting speed
46 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
Price available upon request.
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S71911 ACB/HCP4ADBA Bearing Product Overview & Core Advantages
The S71911 ACB/HCP4ADBA is a precision double-row angular contact ball bearing designed for exceptional performance in demanding applications. Engineered with a duplex back-to-back (DB) arrangement and P4A super-precision tolerance, this bearing is optimized to handle combined radial and axial loads simultaneously. Its compact design, featuring ceramic balls and a phenolic cage, delivers superior high-speed capability, excellent rigidity, and reliable operation, making it ideal for high-precision machinery requiring maximum accuracy and reliability.
S71911 ACB/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71911 | Basic bearing designation, indicating a 55mm bore, 80mm OD, 26mm width angular contact bearing. |
| ACB | Angular Contact Bearing with a 25° contact angle and Extra Light (Class A) preload. |
| HCP4A | Indicates P4A super-precision tolerance class and a phenolic (HCP) cage for high-speed operation. |
| DBA | Specifies the bearing is supplied as a Duplex Back-to-Back (DB) matched set. |
S71911 ACB/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double-row design and duplex back-to-back arrangement provide exceptional system rigidity and stability, enabling the bearing to effectively handle significant combined loads and moment loads.
- Superior High-Speed Performance: The combination of ceramic balls (reducing centrifugal forces and friction) and a lightweight phenolic cage allows for a very high limiting speed of 46,000 rpm, making it an ideal high-speed bearing.
- Precision & Accuracy: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures minimal runout and superior rotational accuracy for precision applications.
- Sealed & Lubricated for Life: The bearing is sealed and pre-lubricated with grease, offering protection from contaminants and providing maintenance-free operation within the specified temperature range.
S71911 ACB/HCP4ADBA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Speed Grinding & Milling Heads
- Precision Robotics & Automation Equipment
- High-Frequency Motors & Spindles
- Medical & Dental Equipment Spindles
- Aerospace Instrumentation
