71922 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71922 ACEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.7 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8482 lbf
Radial static load rating
7312 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
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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71922 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 71922 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This single bearing features an Extra light (Class A) preload and is manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its 25° contact angle is optimized to handle combined radial and axial loads simultaneously. The use of ceramic balls and a phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it ideal for high-reliability, high-rotation precision machinery.
71922 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 110 mm bore, 150 mm OD, and 20 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Specific internal design and preload designation. Extra light preload (Class A) for minimal friction and heat generation at high speeds. |
| /HC | Hybrid Ceramic: Signifies the use of ceramic balls (typically Silicon Nitride) for reduced weight, lower thermal expansion, and higher limiting speed. |
| P4A | The tolerance class, denoting very high precision for dimensional and running accuracy, superior to ABEC 7. |
71922 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (10,000 rpm). It also provides superior resistance to wear and operates effectively in a wide temperature range.
- Phenolic Resin Cage: This lightweight and robust cage material offers excellent dimensional stability and low friction, contributing to smooth operation and high-speed performance.
- Precision Engineering (P4A): Manufactured to the tightest tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring high rotational accuracy.
- Universal Matchable Design (SU): This bearing is universally matchable, allowing multiple bearings to be mounted in a set (up to 4) in various configurations (DB, DF, DT) to achieve the required stiffness and load capacity without selective assembly.
- Optimized Load Capacity: The 25° contact angle provides an excellent balance, offering high radial dynamic load rating (8482 lbf) and substantial thrust capacity.
71922 ACEGA/HCP4A Bearing Typical Application Areas
This high-performance precision bearing is engineered for the most demanding applications across various industries:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
