71900 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71900 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.008 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
10 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
22 mm
Outside diameter tolerance
-0.004mm to 0
Width
6 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
457 lbf
Radial static load rating
176 lbf
Limiting speed
185 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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71900 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 71900 CEGA/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-accuracy applications. As a single bearing that is universally matchable (SU), it offers exceptional versatility in spindle arrangements. Its core advantages stem from its P4A tolerance class, ceramic ball construction, and extra light preload (Class A), enabling superior rotational accuracy, reduced heat generation, and extended service life under extreme operating conditions.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Basic series designation for a super-precision, miniature angular contact ball bearing. |
| CE | Indicates a 15° contact angle, optimized for high-speed performance and moderate axial load capacity. |
| GA | Specifies the universal matchable (SU) feature, allowing any two bearings to be paired in a duplex set for either back-to-back (DB) or face-to-face (DF) mounting without selective assembly. |
| HCP4A | Defines the tolerance class (P4A), which includes extremely tight dimensional and running accuracy tolerances, and the extra light preload (Class A) for minimal friction and optimal high-speed operation. |
71900 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and increases the limiting speed (185,000 rpm). This construction also provides enhanced stiffness and longer life, especially in lubricant-starved conditions.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance of the ceramic balls at ultra-high speeds, contributing to smooth operation and low vibration levels.
- Super-Precision P4A Tolerances: With bore and outside diameter tolerances held to -0.004mm to 0, this bearing guarantees exceptional running accuracy and system rigidity, which is critical for high-precision spindles.
- Optimized Preload: The extra light preload (Class A) minimizes starting and running torque while providing sufficient internal rigidity for precise axial and radial positioning.
71900 CEGA/HCP4A Bearing Typical Application Areas
This bearing is engineered for applications where the highest levels of speed, precision, and reliability are non-negotiable. Key industries and equipment include:
- High-Frequency CNC Spindles for PCB drilling and precision machining
- Turbo-Molecular Pumps and other vacuum equipment
- High-Speed Dental Handpieces
- Precision Grinding Spindles
- Aerospace Gyroscopes and Instrumentation
