S71911 CE/HCPA9AQBCA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71911 CE/HCPA9AQBCA
Basic Information
System of measurement
Metric
Weight
0.59 kg
Tolerance class
PA9A
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
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9225 lbf
Radial static load rating
9562 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
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 CE/HCPA9AQBCA Bearing Product Overview & Core Advantages
The S71911 CE/HCPA9AQBCA is a precision quadruplex angular contact ball bearing designed for the most demanding high-performance applications. This matched set of four bearings, arranged in a back-to-back (QBC) configuration, delivers exceptional system rigidity and stability. Engineered with ceramic balls and a phenolic cage, it is optimized for high-speed operation up to 34,000 rpm while handling significant combined loads. Manufactured to an ultra-precise PA9A tolerance class, it is the ideal solution for machine tool spindles and other applications requiring maximum rotational accuracy and reliability.
S71911 CE/HCPA9AQBCA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71911 CE/HCPA9AQBCA provides detailed technical specifications:
- S7: High-precision angular contact ball bearing series.
- 1911: Standard size designation (55mm bore, 80mm OD, 52mm width).
- CE: Hybrid bearing featuring Ceramic balls and steel rings.
- HC: Phenolic (Polyamide) cage.
- PA9A: Ultra-high precision tolerance class (exceeding ABEC 9).
- QBC: Quadruplex Back-to-Back matched set arrangement.
S71911 CE/HCPA9AQBCA Bearing Structural Features & Performance Benefits
- Extreme Rigidity & Stability: The quadruplex back-to-back (QBC) arrangement creates a highly preloaded system that provides exceptional resistance to moment loads and shaft deflection, ensuring unparalleled machining accuracy.
- Superior High-Speed Performance: The combination of lightweight ceramic balls, which reduce centrifugal forces, and a phenolic cage allows for a very high limiting speed of 34,000 rpm with minimal heat generation.
- High Load Capacity: With a dynamic load rating of 9225 lbf and a static load rating of 9562 lbf, this bearing set is capable of handling substantial combined radial and axial loads.
- Precision & Longevity: The PA9A tolerance class guarantees minimal runout and vibration. The sealed design with pre-applied grease lubrication protects against contamination and ensures consistent performance within a temperature range of -30°C to 110°C.
S71911 CE/HCPA9AQBCA Bearing Typical Application Areas
This bearing is specifically engineered for high-end applications where precision, speed, and rigidity are critical. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles for the semiconductor and electronics manufacturing industry.
