71906 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71906 ACE/P4A Bearing Product Overview & Core Advantages
The 71906 ACE/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction combined with moderate radial loads, this bearing features a 25° contact angle for optimal load distribution. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy and is preloaded for enhanced system stiffness. Its compact design with a 9mm width makes it ideal for space-constrained, high-performance machinery.
71906 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD) |
| ACE | Specific internal design with 25° contact angle and optimized internal geometry |
| P4A | P4 precision class (equivalent to ABEC-7) with specific tolerance and running accuracy requirements |
71906 ACE/P4A Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4 tolerance class with strict dimensional control (bore tolerance: -0.005mm to 0), ensuring minimal runout and vibration. The preloaded configuration eliminates internal clearance, providing superior system stiffness and positioning accuracy.
Optimized Load Capacity: The 25° contact angle and precision-ground raceways enable efficient handling of combined loads, particularly excelling in axial load applications. With a dynamic load rating of 1215 lbf and static load rating of 686 lbf, it offers reliable performance under demanding conditions.
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 58,000 rpm. The open design facilitates efficient lubrication management.
Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high hardness, wear resistance, and long service life. The precision 4.762mm balls (18 count) are meticulously sized and graded for consistent performance.
71906 ACE/P4A Bearing Typical Application Areas
- Machine tool spindles for high-precision machining centers
- High-speed machining heads and precision grinding spindles
- Precision instruments and measuring equipment
- Medical equipment requiring high rotational accuracy
- Semiconductor manufacturing equipment
- Aerospace positioning systems
