S7004 CE/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S7004 CE/P4ADBA Bearing Product Overview & Core Advantages
The S7004 CE/P4ADBA is a precision duplex pair of metric angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This back-to-back (DB) matched set features an extra light preload (Class A) and a P4A tolerance class, making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to handle significant combined loads—simultaneously supporting substantial radial loads and bidirectional axial thrust—within a compact and rigid assembly.
S7004 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 24mm width). |
| C | 15° contact angle, optimized for high-speed performance and axial load capacity. |
| E | Optimized internal design for enhanced performance. |
| P4A | High precision tolerance class, ensuring minimal runout and superior dimensional stability. |
| DB | Duplex Back-to-Back arrangement. This configuration provides high moment rigidity and stable support for combined loads. |
| A | Extra light preload applied to the matched set, reducing vibration and noise for ultra-quiet, high-speed operation. |
S7004 CE/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a robust, preloaded system that significantly increases overall bearing rigidity. This design is exceptionally effective at handling complex combined loads, including heavy radial loads and thrust loads from both directions.
High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction and enabling the high limiting speed of 100,000 rpm. The 15° contact angle further optimizes the bearing for high-speed applications.
Precision & Longevity: Manufactured to a P4A tolerance class from chrome steel, this bearing ensures minimal runout and consistent performance. The standard grease lubrication and sealed design protect against contamination, ensuring reliable operation within the specified temperature range of -30°C to 110°C.
S7004 CE/P4ADBA Bearing Typical Application Areas
The S7004 CE/P4ADBA is engineered for high-performance applications where precision, speed, and rigidity are critical. Typical uses include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Tables
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Aerospace Instrumentation
