S7021 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7021 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7021 ACDGA/P4A is a super-precision double row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Its design excels at simultaneously handling combined radial and axial loads from both directions. Featuring a P4A tolerance class and an extra light preload (Class A), this bearing is optimized for high-speed operation up to 10,000 rpm, making it an ideal choice for high-performance spindles and other precision machinery where minimal runout and high reliability are paramount. Its compact design with a 26mm width provides a space-saving solution without compromising performance.
S7021 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7021 | Basic bearing series, indicating a 105mm bore, 160mm OD double row angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Double row design for high rigidity and moment load capacity. |
| GA | Indicates a Universal Matchable (SU) bearing, supplied in a set of 3 for precise preload arrangement. |
| P4A | Denotes an ultra-precision tolerance class, superior to ABEC-7, ensuring minimal dimensional runout. |
S7021 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design provides significantly increased radial and axial stiffness compared to single row bearings, enabling stable support under combined loads and moment loads. With a dynamic load rating of 20,340 lbf, it offers robust performance in demanding conditions.
Optimized High-Speed Performance: The phenolic resin cage is lightweight and strong, contributing to lower centrifugal forces and reduced friction at high speeds. Combined with the 25° contact angle and extra light preload, this configuration allows for a high limiting speed of 10,000 rpm.
Precision and Stability: Manufactured to P4A tolerance class with tight bore and OD tolerances, this bearing guarantees exceptional running accuracy and minimal vibration, which is critical for applications requiring high positional precision.
Sealed and Lubricated for Life: As a sealed bearing, it is protected from contamination and is pre-lubricated with grease suitable for a temperature range of -30°C to 110°C, ensuring long service life with minimal maintenance.
S7021 ACDGA/P4A Bearing Typical Application Areas
The S7021 ACDGA/P4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and milling machines.
- High-Frequency Motors and Spindles: Where high rotational speed and accuracy are required.
- Precision Instrumentation: In measuring devices and laboratory equipment.
- Robotics: For high-accuracy joints and rotary axes.
