71902 CD/P4ADGC
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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71902 CD/P4ADGC Bearing Product Overview & Core Advantages
The 71902 CD/P4ADGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision and dimensional stability. Its 15° contact angle and universal matchable (SU) design enable it to accommodate combined loads (radial and axial) efficiently in either direction when mounted with a matched pair. The phenolic resin cage contributes to its high-speed capability, while the moderate preload (Class C) ensures optimal stiffness and minimal deflection under operational stresses, making it ideal for high-precision, high-reliability systems.
71902 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 71902 | Bearing series and size designation (15mm bore, 28mm OD, 14mm width) |
| CD | Contact angle of 15° |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| DGC | Universal matchable bearing designed for duplex mounting (SU arrangement) |
71902 CD/P4ADGC Bearing Structural Features & Performance Benefits
High Precision & Rigidity: The P4A tolerance class ensures minimal runout and vibration, while the moderate preload provides enhanced system stiffness, critical for applications requiring precise positioning.
Superior Load Capacity: With a 15° contact angle and optimized internal geometry, the bearing effectively handles combined radial and axial loads in both directions when used in matched pairs.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at limiting speeds up to 230,000 rpm. The open design allows for efficient lubrication management.
Precision Materials: Manufactured from chrome steel for both rings and balls, the bearing offers excellent wear resistance and durability under demanding conditions.
71902 CD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring devices and optical equipment
- High-Speed Motors - Servo motors and spindle drives
- Medical Equipment - Dental handpieces and laboratory automation systems
- Aerospace Systems - Gyroscopes and navigation instruments
