S7019 CD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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S7019 CD/P4AQBCA Bearing Product Overview & Core Advantages
The S7019 CD/P4AQBCA is a precision quadruplex matched bearing set engineered for the most demanding applications requiring exceptional rigidity and rotational accuracy. This metric angular contact ball bearing features a back-to-back (QBC) arrangement of four bearings, providing superior stability and the ability to withstand combined loads (radial and bidirectional axial loads) simultaneously. Manufactured to a P4A tolerance class with an extra light preload, it delivers ultra-high running accuracy and is ideally suited for high-speed spindles and other high-precision, high-rigidity machinery.
S7019 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7019 | Basic bearing designation, indicating a 95 mm bore, 145 mm OD, and angular contact design. |
| CD | Indicates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| P4A | Specifies the tolerance class, denoting very high precision levels for both running accuracy and dimensional tolerances. |
| QBC | Denotes the Quadruplex Back-to-Back matched arrangement. This configuration provides maximum rigidity and moment load capacity. |
| A | Specifies an Extra Light Preload within the matched set, minimizing friction and heat generation for superior high-speed performance. |
S7019 CD/P4AQBCA Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Stability: The quadruplex back-to-back (QBC) arrangement creates an extremely rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise rotational alignment under heavy combined loads.
- High-Speed Capability: The combination of a 15° contact angle (CD), phenolic resin cage (for reduced weight and friction), and extra light preload (A) enables a high limiting speed of 15,000 rpm, making it ideal for spindle applications.
- Precision Performance: Manufactured to P4A tolerance class standards, this bearing guarantees minimal runout and vibration, which is critical for achieving superior surface finishes and machining accuracy.
- Sealed & Pre-Lubricated: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
- High Load Capacity: With a dynamic load rating of 48,600 lbf and a static load rating of 72,000 lbf, it is built to handle significant operational stresses.
S7019 CD/P4AQBCA Bearing Typical Application Areas
This high-precision matched bearing set is specifically designed for advanced machinery where ultimate precision and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications demanding the highest levels of rotational accuracy.
- High-Frequency Machining Centers: Where rapid acceleration and deceleration require exceptional bearing stability.
- Other Precision Rotary Equipment: Such as high-speed pumps, compressors, and specialized test apparatus.
