71922 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71922 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71922 ACDGA/P4A is a single-row angular contact ball bearing designed for applications demanding the highest levels of precision and rotational accuracy. Positioned in the P4A super-precision tolerance class, it delivers exceptional running accuracy and dimensional stability. Its key advantage lies in its ability to accommodate high combined loads (radial and axial) simultaneously, making it ideal for high-speed spindles and other precision machinery where rigidity and minimal runout are critical. The combination of a phenolic cage and optimized 25° contact angle ensures superior high-speed performance and operational reliability.
71922 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71922 | Basic bearing series and size designation | Defines the core dimensions: 110mm bore, 150mm OD, 20mm width. |
| AC | Angular Contact | Optimized for combined radial and axial loads. |
| D | High Contact Angle (25°) | Provides higher axial load capacity. |
| GA | Universal Matchable (SU), Light Preload | Bearings are selectively matched in sets of 3 for precise axial clearance/preload when mounted together. |
| P4A | Tolerance Class | Super precision grade, tighter than ABEC 7/ISO P4, ensuring extreme running accuracy and high-speed capability. |
71922 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Performance & Thermal Stability: The phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and superior performance at high rotational speeds (up to 10,000 rpm). It is well-suited for the specified temperature range of -30°C to 110°C.
- Superior Rigidity and Load Capacity: The 25° contact angle and high-grade chrome steel construction provide high rigidity, enabling the bearing to handle significant dynamic and static loads (13,162 lbf dynamic / 15,300 lbf static).
- Ultimate Precision: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This guarantees minimal runout and vibration, which is critical for precision machining and high-speed applications.
- Matched Set Flexibility: As a Universal Matchable (SU) bearing supplied in sets of 3, it allows for flexible mounting configurations (back-to-back, face-to-face, or tandem) to achieve the desired preload and system stiffness.
71922 ACDGA/P4A Bearing Typical Application Areas
The 71922 ACDGA/P4A is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: CNC rotary tables, indexing heads, and robotic arm joints.
- High-Frequency Motors and Spindles: Where minimal vibration and high rotational accuracy are paramount.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
