S7030 CD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7030 CD/P4AQBCA Bearing Product Overview & Core Advantages
The S7030 CD/P4AQBCA is a precision quadruplex matched bearing set designed for the most demanding applications. This metric angular contact ball bearing features an Extra light (Class A) preload and is arranged in a Back-to-Back (QBC) configuration. Its core advantage lies in providing exceptional system rigidity and rotational accuracy, making it ideal for applications requiring high precision and stability under combined radial and axial loads. The sealed design and pre-lubrication ensure long-term, maintenance-free operation.
Model Code Breakdown
- S7030: Basic bearing series and size designation.
- CD: Indicates a 15° contact angle, optimized for high-speed operation and moderate axial loads.
- P4A: Denotes a super-precision tolerance class (exceeding ABEC 7), ensuring minimal runout and superior running accuracy.
- QBC: Specifies the bearing is part of a Quadruplex (4 bearings) matched set in a Back-to-Back arrangement. This configuration provides high moment stiffness and excellent operational stability.
- Sealed / Grease: The bearing is supplied sealed and pre-lubricated with grease, offering protection from contamination and ready for immediate installation.
S7030 CD/P4AQBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding significant combined (radial and axial) loads and moment loads, which is critical for maintaining precision in machine tool spindles.
Super-Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees extremely tight dimensional control, leading to minimal vibration, low noise, and superior running accuracy for high-precision machinery.
Optimized High-Speed Capability: The 15° contact angle (CD) and phenolic resin cage are engineered for high-speed operation, contributing to a low limiting speed of 11,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly at high velocities.
Sealed & Ready-to-Use: The integrated seals protect the high-grade chrome steel components from contaminants. Pre-lubricated with grease, the bearing is maintenance-free and operational within a temperature range of -30°C to 110°C.
S7030 CD/P4AQBCA Bearing Typical Application Areas
This high-precision matched set is ideally suited for applications where ultimate rigidity and accuracy are paramount. Key industries and equipment include:
- High-Precision Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Speed Machining Centers
- Precision Grinding Spindles
- Other high-performance industrial machinery requiring pre-loaded, multi-bearing arrangements for maximum stiffness.
