S71915 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71915 ACB/P4A Bearing Product Overview & Core Advantages
The S71915 ACB/P4A is a precision angular contact ball bearing designed for applications demanding high rotational accuracy and rigidity. As a single-row bearing, it excels at supporting combined loads—simultaneously handling significant radial loads and thrust loads in one direction. Its P4 (ABEC-7) tolerance class ensures exceptional running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The bearing comes pre-lubricated and is available with a preload, contributing to its high rigidity and stable operational performance.
S71915 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S71915 | Denotes the bearing series and size. The "S" prefix often indicates a design optimized for high-speed operation. |
| ACB | Angular Contact Bearing with a specific contact angle of 25° and a specific internal design. |
| P4A | Specifies the P4 (ABEC-7) tolerance class for ultra-high precision. The "A" suffix may indicate a specific preload or internal clearance group. |
S71915 ACB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 tolerance with a 25° contact angle, this bearing provides high running accuracy and system stiffness, which is critical for minimizing deflection under load.
Superior Load Capacity: The optimized internal geometry, including a ball quantity of 34 and a ball diameter of 6.35 mm, enables it to handle high dynamic and static load ratings (2992 lbf and 2812 lbf respectively).
High-Speed Capability: The use of a lightweight, durable phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 15,000 rpm. This makes it a true high-speed bearing.
Ready-to-Use and Reliable: The bearing is pre-lubricated and sealed, protecting against contamination and ensuring long-term, maintenance-free operation within its specified temperature range of -30° to 110°C.
S71915 ACB/P4A Bearing Typical Application Areas
The S71915 ACB/P4A is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: For CNC machining centers, grinders, and lathes requiring high rigidity and accuracy.
- High-Speed Motors and Spindles: Used in applications pushing rotational limits.
- Precision Instrumentation: Critical for medical devices, optical scanners, and measuring equipment.
- Aerospace and Defense Systems: Where reliability under high-speed and precision conditions is non-negotiable.
