71913 CB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71913 CB/P4A Bearing Product Overview & Core Advantages
The 71913 CB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, this single bearing is preloaded to ensure minimal axial and radial play, providing superior running accuracy and system stiffness. Its optimized 15° contact angle is engineered to support high combined loads, handling significant thrust loads in one direction alongside radial loads. The phenolic resin cage contributes to smooth, high-speed operation, making it an ideal solution for high-performance spindles and precision machinery.
71913 CB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| CB | Specific internal design and contact angle (15°), optimized for combined loads. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements. The "A" denotes a modified internal clearance or preload for enhanced rigidity. |
71913 CB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The preloaded design eliminates internal clearance, resulting in exceptional system stiffness and precise shaft positioning, crucial for applications like machine tool spindles.
- Superior Load Capacity: The 15° contact angle and robust construction enable the bearing to efficiently handle combined radial and axial loads, with a dynamic load rating of 2385 lbf.
- High-Speed Capability: The lightweight phenolic resin cage ensures low inertia and excellent performance at high rotational speeds, with a limiting speed of 30,000 rpm. This material also offers good slip and wear characteristics.
- Pre-Lubricated for Immediate Use: The bearing comes lubricated and is ready for installation, simplifying the assembly process.
71913 CB/P4A Bearing Typical Application Areas
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Medical and Dental Equipment
- Robotic Arm Joints and Precision Gearboxes
