71915 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71915 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.29 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5062 lbf
Radial static load rating
3825 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Lubricated
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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71915 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 71915 CEGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This single bearing features a 15° contact angle and is manufactured to P4A super-precision tolerance class, ensuring minimal runout and vibration. Its core advantages include the ability to accommodate combined radial and axial loads, superior high-speed performance enabled by a phenolic cage and ceramic balls, and universal matchability (SU) for simplified preload setting in paired arrangements. This bearing is pre-lubricated for immediate use and operates reliably within a wide temperature range.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71915 | Basic bearing designation (75mm bore, 105mm OD, 16mm width) |
| C | 15° contact angle |
| E | Optimized internal design for high performance |
| GA | Preload: Extra light (Class A) |
| HC | Hybrid Ceramic (Ceramic balls with steel rings) |
| P4A | Tolerance class: P4A (super precision) |
71915 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (36,000 rpm). This also provides superior resistance to electrical erosion and operation with minimal lubrication.
- Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at high speeds and offers excellent dimensional stability.
- High Rigidity & Load Capacity: The angular contact design and super-precision manufacturing provide high system rigidity, effectively supporting combined loads (Radial dynamic: 5062 lbf, Static: 3825 lbf).
- Universal Matchability (SU): As a universal matchable bearing, any two bearings can be paired in a back-to-back or face-to-face arrangement to achieve the desired preload, simplifying inventory and assembly.
- Pre-lubricated & Open Seal: The bearing comes pre-lubricated for immediate operation and features an open design for applications where external lubrication systems are used.
71915 CEGA/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Speed Motors: Motors and generators requiring minimal vibration and high rotational accuracy.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
