71902/VA9D1
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/VA9D1 Bearing Product Overview & Core Advantages
The 71902/VA9D1 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running precision and is universally matchable (SU), allowing for precise preload control when mounted in pairs. Its compact design with a 15mm bore and 7mm width provides excellent space-saving solutions while maintaining high load-carrying capacity and high-speed performance up to 95,000 rpm.
71902/VA9D1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 71902 | Basic bearing designation indicating single-row angular contact design with 15mm bore, 28mm OD, and 7mm width |
| VA9D1 | Indicates universal matching bearing (SU) with specific preload and pairing characteristics for precise axial positioning |
71902/VA9D1 Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0) ensuring exceptional running accuracy and minimal vibration.
Optimized Contact Angle: The 25° contact angle provides optimal balance between radial and axial load capacity, making it suitable for combined loading conditions.
Advanced Cage Design: Phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and superior performance at high rotational speeds up to 95,000 rpm.
Premium Material Selection: Chrome steel rings and balls provide exceptional hardness, wear resistance, and dimensional stability across the operating temperature range (-30°C to 110°C).
Precision Ball Configuration: 13 high-precision balls with 3.969mm diameter ensure smooth operation and optimal load distribution.
71902/VA9D1 Bearing Typical Application Areas
Machine Tool Spindles: High-precision machining centers and grinding spindles requiring P4 tolerance accuracy
High-Speed Motors: Servo motors, spindle motors, and other high-speed rotary applications
Precision Instruments: Measuring equipment, optical instruments, and laboratory apparatus
Robotics & Automation: Robot arm joints, precision positioning systems, and automated manufacturing equipment
Aerospace Components: Guidance systems, avionics, and other critical aerospace applications
