71815 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71815 ACD/P4 Bearing Product Overview & Core Advantages
The 71815 ACD/P4 is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and reliability. This P4 (ABEC-7) tolerance class bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, while also supporting significant radial loads. Its optimized 25° contact angle and phenolic cage contribute to superior high-speed performance and operational stability. Pre-lubricated and available with a preload, it offers immediate, high-rigidity performance right out of the box, making it an ideal solution for high-precision spindles and other critical machinery.
71815 ACD/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71815 | Basic bearing designation indicating a metric, single-row angular contact ball bearing with a 75mm bore and 95mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high ball complement (33 balls), which increases load capacity and rigidity. |
| P4 | Indicates a high-precision tolerance class equivalent to ABEC-7, ensuring minimal runout and superior rotational accuracy. |
71815 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized 25° contact angle and high ball complement (33 balls of 5.556mm diameter) provide excellent resistance to deformation under load, resulting in superior system stiffness and the ability to handle high combined radial and axial loads.
- High-Speed Performance: The lightweight phenolic resin cage ensures low inertia and excellent guidance for the balls, contributing to stable operation at the high limiting speed of 18,000 rpm. This makes it a true high-speed bearing.
- Precision & Accuracy: Manufactured to P4 precision class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees minimal vibration and precise rotational performance for demanding applications.
- Preload & Matched Arrangement: The bearing is supplied with a preload, eliminating internal clearance for immediate high rigidity and precise shaft positioning. It is designed as a single, matched bearing for simplified installation and optimal performance.
71815 ACD/P4 Bearing Typical Application Areas
The 71815 ACD/P4 is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in high-output and servo applications.
- High-Frequency Motors and Spindles: For PCB drilling and other micro-machining equipment.
- Medical and Laboratory Equipment: Centrifuges and other high-speed precision instruments.
- Robotics: High-accuracy joints and arm assemblies.
