71938 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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71938 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71938 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating under the stringent P4A tolerance class, this bearing is engineered to handle combined loads efficiently, offering superior performance in high-speed and high-precision environments. Its universal matchable (SU) design allows for flexible mounting arrangements, simplifying installation and ensuring optimal performance in complex systems. The bearing is pre-lubricated for immediate use and features a phenolic cage for reliable high-speed operation.
71938 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71938 | Basic bearing series and size designation | Defines the core dimensions: 190mm bore, 260mm OD, 66mm width. |
| AC | 25° Contact Angle | Optimized for handling significant axial loads in one direction and radial loads. |
| D | High Ball Complement | Increased number of balls for higher load capacity and rigidity. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance. |
| GA | Universal Matchable (SU) Arrangement | Bearing is one of a pair that can be mounted in various configurations (e.g., back-to-back, face-to-face) to handle combined or moment loads. |
71938 ACD/P4ADGA Bearing Structural Features & Performance Benefits
The 71938 ACD/P4ADGA derives its superior performance from a carefully engineered design. The 25° contact angle and high ball complement work in tandem to provide exceptional high rigidity and the ability to sustain substantial combined loads. The phenolic cage ensures stability and low friction at high rotational speeds, contributing to the bearing's impressive limiting speed of 11,000 rpm. Manufactured to P4A precision standards with tight bore, outer diameter, and width tolerances, this bearing guarantees minimal runout and vibration, which is critical for high-speed and high-accuracy applications. The universal matchable (SU) feature provides design flexibility, allowing engineers to create optimized bearing arrangements for specific load conditions.
71938 ACD/P4ADGA Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for demanding applications where accuracy, speed, and rigidity are paramount. Typical uses include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: In industrial robotics and automation equipment.
- High-Frequency Motors and Spindles: Where minimal vibration and high running accuracy are required.
- Medical and Laboratory Equipment: Such as centrifuges and imaging devices.
- Aerospace Actuation Systems: For reliable performance in critical control mechanisms.
