S71910 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71910 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.11 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.144 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
2858 lbf
Radial static load rating
1912 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
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
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In Stock
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S71910 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71910 CEGA/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing from a universally matchable (SU) pair, it excels in handling combined loads—simultaneously supporting significant radial loads and axial loads in one direction. Its construction with ceramic balls and P4A tolerance class ensures exceptional rotational accuracy, low heat generation, and extended service life, making it ideal for high-reliability precision machinery.
S71910 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 71910 | Precision angular contact ball bearing series with 50mm bore, 72mm OD, 12mm width |
| C | 15° contact angle design |
| EGA | Pre-greased with specific high-performance lubricant |
| HC | Hybrid ceramic construction (steel rings with ceramic balls) |
| P4A | Super precision tolerance class (equivalent to ABEC 7) |
S71910 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: Silicon nitride ceramic balls provide superior performance including reduced friction, higher stiffness, and electrical insulation properties compared to all-steel bearings.
- High-Speed Capability: The phenolic resin cage and optimized 15° contact angle enable exceptional limiting speeds up to 34,000 rpm, making it ideal for high-speed spindle applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0) ensures minimal runout and vibration for superior rotational accuracy.
- Enhanced Rigidity & Load Capacity: The angular contact design provides high rigidity against combined loads, with dynamic load rating of 2858 lbf and static load rating of 1912 lbf.
- Maintenance-Free Operation: Pre-greased and sealed construction eliminates relubrication needs, supporting continuous operation within the temperature range of -30°C to 110°C.
S71910 CEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, CNC milling machines, and grinding spindles
- Precision Instrumentation: Measuring equipment, optical scanners, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and high-frequency electric motors
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and laboratory centrifuges
