71922 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71922 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 71922 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single row bearing is distinguished by its extra light preload (Class A) and P4A super-precision tolerance class, ensuring minimal runout and vibration for ultra-smooth operation. Its ceramic ball construction and phenolic cage contribute to superior high-speed capabilities and reduced rotating mass. Designed to handle significant combined loads with a 25° contact angle, it is universally matchable (SU), allowing for precise axial preload adjustment when mounted in sets. This bearing is pre-lubricated for immediate use and operates effectively within a wide temperature range.
Model Code Breakdown
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71922 | Basic bearing series and size designation | Indicates a high-precision angular contact bearing with 110mm bore, 150mm OD, and 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 designation) | Allows for flexible mounting in preloaded sets without selective matching. |
| HCP4A | Tolerance Class & Internal Clearance | Denotes P4A super-precision tolerances and a specific internal clearance for high-rigidity applications. |
71922 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Rigidity: The combination of ceramic balls and a lightweight phenolic resin cage significantly reduces centrifugal forces and inertial mass, enabling stable operation at limiting speeds of 10,000 rpm. The extra light preload ensures high system rigidity with minimal friction and heat generation.
Precision & Load Capacity: Manufactured to P4A tolerance class with tight dimensional control on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy. The 25° contact angle design provides an optimal balance, offering high radial dynamic load rating of 13,162 lbf and substantial axial load capacity.
Thermal Stability & Matching: The phenolic cage offers excellent dimensional stability across the operating temperature range (-30°C to 110°C). As a universally matchable (SU) bearing, it can be mounted in any combination within a set of three to achieve the desired preload, simplifying installation and inventory management.
71922 ACDGA/HCP4A Bearing Typical Application Areas
The 71922 ACDGA/HCP4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high positional accuracy.
- High-Frequency Motors and Spindles: For PCB drilling, dental handpieces, and small tool spindles.
- Aerospace & Defense Systems: Gyroscopes, radar positioning systems, and other critical instrumentation.
- Medical Equipment: Centrifuges and high-speed imaging devices.
