S7004 CDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7004 CDGB/P4A Bearing Product Overview & Core Advantages
The S7004 CDGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This single bearing features a 15° contact angle and is manufactured to P4A super-precision tolerance standards, ensuring minimal runout and vibration. Its key advantage lies in its ability to handle combined loads (radial and axial) efficiently while operating at high speeds. Pre-loaded as Light / Class B, it provides superior rotational accuracy and system rigidity right from installation, making it ideal for high-performance spindles and precision machinery.
S7004 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD, 12mm width). |
| C | Specifies a 15° contact angle. |
| DG | Universal Matchable (Universal Matchable (SU)). Two bearings can be universally paired in a back-to-back (DB) or face-to-face (DF) arrangement. |
| B | Indicates a Light preload (Class B). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7 standards for exceptional running accuracy. |
S7004 CDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The phenolic cage and chrome steel rings/balls, combined with the P4A tolerance, provide exceptional dimensional stability and minimize deflection under load, crucial for high-precision applications.
Superior Load Capacity: The angular contact design with a 15° contact angle is optimized to support significant combined radial and axial loads simultaneously, offering a dynamic load rating of 1960 lbf.
Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, and the grease lubrication is selected for a wide temperature range (-30°C to 110°C), enabling a high limiting speed of 100,000 rpm.
Sealed and Ready-to-Use: As a sealed bearing, it is protected from contamination and comes pre-lubricated with grease, ensuring long service life and reducing maintenance requirements.
S7004 CDGB/P4A Bearing Typical Application Areas
The S7004 CDGB/P4A is engineered for high-performance applications where precision and speed are critical. Its primary uses include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Robotics (Articulated arms and high-accuracy joints)
- High-Frequency Spindles (PCB drilling, dental handpieces)
- Optical and Measuring Equipment (Coordinate Measuring Machines, rotary encoders)
