71902 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71902 ACD/P4A Bearing Product Overview & Core Advantages
The 71902 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and exceptional rotational accuracy. Positioned in the P4 (ABEC-7) tolerance class, this bearing is designed to handle significant axial loads in one direction, making it ideal for high-speed spindles and precision machinery. Its compact design, with a 15 mm bore and 7 mm width, provides a high-performance solution in a minimal footprint. The bearing is pre-lubricated and features a phenolic cage, contributing to its high-speed capability and smooth operation.
71902 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series, indicating a light series, 15mm bore angular contact bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high-precision, duplex design-ready bearing. It is supplied with a preload and is intended to be mounted in a matched pair. |
| P4A | Indicates the tolerance class P4 (ABEC-7) and specific running accuracy requirements. The 'A' suffix often denotes a specific tolerance or preload grouping for matched sets. |
71902 ACD/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class, this bearing ensures minimal runout and vibration. The 25° contact angle and preload provide high system rigidity, which is critical for maintaining accuracy under load.
- Optimized for High Speeds: The lightweight phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly at the limiting speed of 80,000 rpm. This makes it suitable for very high-speed applications like machine tool spindles.
- Superior Load Capacity: As an angular contact ball bearing, it is designed to support combined (radial and axial) loads, with a high dynamic load rating of 848 lbf.
- Pre-Lubricated & Ready-to-Use: The bearing comes pre-lubricated, ensuring immediate, reliable performance upon installation within its specified temperature range of -30°C to 110°C.
71902 ACD/P4A Bearing Typical Application Areas
The 71902 ACD/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotics and Automation Arms
- High-Frequency Spindles for PCBs and Semiconductors
- Medical Equipment (Dental handpieces, centrifuges)
- Aerospace Actuation Systems
