71811 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71811 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71811 ACDGA/P4 is a single row angular contact ball bearing designed for applications demanding high precision and superior performance. Operating under the stringent P4 tolerance class, this bearing excels in scenarios requiring exceptional running accuracy. Its 25° contact angle is optimized to handle significant axial loads in one direction, while also supporting substantial radial loads. The combination of a phenolic cage and factory-applied lubrication enables high-speed operation, making it an ideal choice for high-speed spindles and precision machinery where rigidity and minimal vibration are critical.
71811 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| AC | Angular Contact design | Optimized for combined radial and axial loads. |
| D | High Ball Complement & Modified Raceways | Increased load capacity and optimized stress distribution. |
| GA | Light Preload (Class A) | Reduces axial and radial play, enhancing shaft rigidity and rotational accuracy. |
| P4 | High Precision Tolerance Class | Tighter dimensional and running accuracy tolerances for superior performance in precision applications. |
71811 ACDGA/P4 Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to ABEC 7 / P4 tolerance standards, this bearing ensures minimal runout and vibration. The light preload (GA) eliminates internal clearance, providing maximum shaft support and high rigidity for precise positioning.
Optimized Load Capacity: The 25° contact angle and high ball complement (D) design enable the bearing to carry high axial loads and significant radial loads simultaneously. With a dynamic load rating of 2151 lbf and a static load rating of 2295 lbf, it is built for demanding applications.
High-Speed Capability: The lightweight phenolic resin cage offers excellent strength and low friction at high speeds, contributing to a high limiting speed of 34,000 rpm. The bearing is pre-lubricated to ensure immediate and reliable operation.
Universal Matching (SU): This bearing is universally matchable, allowing multiple bearings to be mounted in sets (back-to-back, face-to-face, or tandem) without selective assembly, simplifying installation and achieving desired preload or stiffness.
71811 ACDGA/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instruments: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors: Spindles for PCB drilling and high-speed electric motors.
- Robotics: High-accuracy joints and arm assemblies requiring minimal backlash.
