S7021 CDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7021 CDGA/P4A Bearing Product Overview & Core Advantages
The S7021 CDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional rotational accuracy. Operating under the stringent P4A tolerance class, it is designed to handle combined loads with a consistent 15° contact angle. Its Universal Matchable (SU) designation allows for precise preload control when mounted in sets, making it ideal for high-rigidity spindles. The bearing is pre-lubricated with grease and features integrated sealing, ensuring long-term, maintenance-free operation and reliable performance in demanding environments.
S7021 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CDGA | Specifies a 15° contact angle and an Extra Light (A) preload. | Optimized for high-speed operation with minimal friction and heat generation. |
| P4A | Denotes an ultra-precision tolerance class exceeding ABEC 7. | Ensures extreme running accuracy, low noise, and vibration for critical applications. |
S7021 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4A tolerances with a phenolic resin cage, this bearing provides exceptional dimensional stability and minimal runout, which is critical for high-speed spindles requiring maximum rigidity.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently support combined radial and axial loads. With a dynamic load rating of 21,510 lbf and a static load rating of 21,712 lbf, it offers reliable performance under significant stress.
- Superior High-Speed Performance: The combination of the lightweight phenolic cage, precision-ground chrome steel components, and extra light preload enables a high limiting speed of 10,000 rpm, reducing centrifugal forces and operational temperature.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for maintenance-free operation within its specified temperature range, enhancing machine uptime.
S7021 CDGA/P4A Bearing Typical Application Areas
The S7021 CDGA/P4A is specified for high-performance machinery where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
