71948 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71948 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71948 ACDGA/P4A is a single-row angular contact ball bearing designed for applications demanding ultra-high precision and exceptional rotational accuracy. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle provides excellent capacity for combined radial and axial loads, while the Extra Light (Class A) preload ensures minimal deflection and high system rigidity. This bearing is universal matchable (SU), allowing for flexible mounting configurations in multi-bearing arrangements to achieve optimal stiffness and load distribution.
71948 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71948 | Basic bearing series and size designation |
| AC | Angular Contact design with 25° contact angle |
| D | High-precision phenolic resin cage |
| GA | Universal Matchable bearing (SU designation) |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 standards |
71948 ACDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal dimensional variation, providing exceptional running accuracy and positioning precision critical for high-performance applications.
Optimized Load Capacity: With a 25° contact angle, this bearing efficiently handles combined radial and axial loads, making it ideal for applications requiring bidirectional thrust capacity.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and superior high-speed performance, supporting limiting speeds up to 7,500 rpm.
Enhanced Rigidity: The Extra Light preload (Class A) minimizes deflection under load, ensuring high system stiffness and maintaining precise alignment in demanding operating conditions.
Universal Matching Capability: As an SU-type universal matchable bearing, it can be paired in various configurations (back-to-back, face-to-face, or tandem) to optimize load distribution and system performance.
71948 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision milling, grinding, and turning centers
- Precision Gearboxes - Industrial transmission systems requiring minimal runout
- Aerospace Components - Actuators, flight control systems, and auxiliary power units
- Medical Equipment - High-speed dental handpieces, surgical robots, and imaging systems
- Semiconductor Manufacturing - Wafer handling robots and precision positioning stages
- Test & Measurement Equipment - Coordinate measuring machines and optical inspection systems
