71918 ACDGA/P4AL
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71918 ACDGA/P4AL Bearing Product Overview & Core Advantages
The 71918 ACDGA/P4AL is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Operating under P4A tolerance class, this bearing is designed to handle primarily axial loads in one direction, along with combined radial and axial loads. Its extra light preload (Class A) minimizes deflection under operational forces, ensuring smooth, precise rotation ideal for high-speed spindles and precision machinery. The phenolic cage and universal matching (SU designation) capability enable optimized performance in complex, multi-bearing arrangements.
71918 ACDGA/P4AL Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series designation for high-precision angular contact bearings |
| AC | Angular Contact design with 25° contact angle |
| D | High-precision phenolic resin cage |
| GA | Universal matching bearing (can be paired in any combination) |
| P4A | Extra-high precision tolerance class with enhanced running accuracy |
| L | Light preload for minimal deflection under operational loads |
71918 ACDGA/P4AL Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with extremely tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0) ensuring exceptional running accuracy and minimal vibration.
Optimized Load Capacity: The 25° contact angle provides superior axial load carrying capacity while maintaining excellent radial load performance, with dynamic load rating of 9945 lbf and static load rating of 10800 lbf.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at limiting speeds up to 15,000 rpm, reducing centrifugal forces and maintaining stability.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired in any combination (face-to-face, back-to-back, or tandem) without performance degradation, enabling flexible bearing arrangements.
Premium Material Selection: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and dimensional stability across the operating temperature range of -30°C to 110°C.
71918 ACDGA/P4AL Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes requiring exceptional running accuracy
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus demanding minimal vibration
- High-Speed Automation: Industrial robots, CNC machining centers, and automated production equipment
- Aerospace Components: Guidance systems, aircraft instruments, and navigation equipment requiring reliable precision
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
