71918 ACE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71918 ACE/P4ADGA Bearing Product Overview & Core Advantages
The 71918 ACE/P4ADGA is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its universal matchable (SU) design allows for flexible mounting in preloaded arrangements, providing high system rigidity and excellent performance under combined loads. The phenolic cage and optimized 25° contact angle contribute to its high-speed capabilities, making it an ideal solution for high-precision, high-speed spindle systems.
71918 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series and size designation |
| ACE | 25° contact angle, universal matchable design |
| P4A | Super precision tolerance class with enhanced running accuracy |
| DGA | Preloaded pair (2 bearings) in universal match arrangement |
71918 ACE/P4ADGA Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4A tolerance class ensures minimal runout and vibration, while the universal matching capability enables optimal preload configuration for maximum system stiffness.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing efficiently handles combined radial and axial loads, featuring a dynamic load rating of 10,530 lbf and static load rating of 10,238 lbf.
High-Speed Performance: The phenolic cage provides excellent strength-to-weight ratio and lubrication retention, supporting operation at limiting speeds up to 15,000 rpm.
Precision Engineering: Manufactured from chrome steel with precisely controlled bore and OD tolerances (-0.004mm to 0), ensuring consistent performance and long service life.
71918 ACE/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory devices
- High-Speed Motors: Spindle motors, high-frequency motors, and precision drive systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
