71902 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71902 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71902 CD/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under P4A tolerance class, this metric bearing features a universal matchable (SU) design, allowing two bearings to be paired in a universal arrangement for optimal preload control. Its 15° contact angle and phenolic cage enable superior high-speed performance, making it ideal for machine tool spindles and other high-precision, high-reliability equipment where handling combined radial and axial loads is critical.
71902 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Super-precision angular contact bearing series with 15mm bore, 28mm OD |
| CD | 15° contact angle design optimized for high-speed operation |
| P4A | Ultra-high precision tolerance class with enhanced running accuracy |
| DGA | Universal matchable (SU) pairing designation for preload optimization |
71902 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Precision: Manufactured to P4A tolerance standards with extremely tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing delivers exceptional running accuracy and system stiffness. The universal matchable design enables precise preload control when paired, enhancing overall system rigidity.
Optimized High-Speed Performance: The phenolic cage material and 15° contact angle work in concert to achieve outstanding high-speed capabilities, with a limiting speed of 230,000 rpm. This combination reduces centrifugal forces and maintains stability at extreme rotational velocities.
Superior Load Capacity: With a dynamic load rating of 1462 lbf and static load rating of 855 lbf, this bearing efficiently handles combined radial and axial loads. The optimized ball complement (13 balls) and 3.969mm ball diameter provide excellent load distribution and fatigue resistance.
Pre-optimized Lubrication: Factory lubrication ensures immediate operational readiness and supports the wide temperature range of -30°C to 110°C, making it suitable for various industrial environments.
71902 CD/P4ADGA Bearing Typical Application Areas
The 71902 CD/P4ADGA excels in applications requiring ultra-high precision and speed:
- Machine Tool Spindles: High-speed machining centers and precision grinding machines
- Precision Instrumentation: Measuring equipment and laboratory instruments
- High-Speed Motors: Spindle motors and high-frequency electric motors
- Aerospace Components: Gyroscopes and navigation system components
- Medical Equipment: Dental handpieces and surgical tool rotors
