S71911 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71911 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
0.31 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
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7020 lbf
Radial static load rating
6525 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
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
No drawings available at the moment, will be launched soon
In Stock
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S71911 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The S71911 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a universal matchable (SU) design, allowing two bearings to be paired in a duplex set for optimal rigidity. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance and reduced rotational mass. Engineered to handle combined loads (radial and axial) simultaneously with a 15° contact angle, it offers high rigidity and operational reliability in compact installations.
S71911 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71911 CD/HCP4ADGA is decoded as follows:
- S: Precision level indicator
- 7: Angular contact ball bearing type
- 1911: Dimension series (19: width series, 11: bore code for 55mm)
- CD: Universal Matchable (SU) duplex arrangement
- HC: Hybrid Ceramic (Ceramic balls, steel rings)
- P4A: High-precision tolerance class (superior to ABEC 7)
- DGA: Preload designation (Extra light preload / Class A)
S71911 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design and universal matching provide exceptional stiffness, enabling the bearing to withstand significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic (hybrid) balls minimizes centrifugal forces, allowing for a high limiting speed of 34,000 rpm.
- Precision & Accuracy: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for high-precision spindles.
- Long-Term Reliability: The sealed design and pre-applied grease lubrication protect against contamination and provide consistent performance within a wide temperature range of -30°C to 110°C, reducing maintenance needs.
S71911 CD/HCP4ADGA Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- High-Frequency Motors & Spindles: Where low inertia and high rotational accuracy are paramount.
- Precision Instrumentation: Medical devices, optical scanners, and coordinate measuring machines.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
