S7210 ACDGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7210 ACDGA/P4A Bearing Product Overview & Core Advantages
The S7210 ACDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Positioned in the P4A tolerance class, it is designed to handle significant axial loads in one direction while accommodating radial loads, making it ideal for high-speed spindles and precision machinery. Its extra light preload (Class A) ensures minimal deflection and smooth operation, contributing to exceptional system rigidity and positional accuracy. The combination of a phenolic resin cage and grease lubrication enables high-speed capability and reliable performance within a wide temperature range.
S7210 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7210 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 50mm bore. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| DGA | Universal Matchable (SU) bearing. "DGA" typically indicates a specific internal design and preload (Extra Light / Class A) for universal pairing. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy, superior to ABEC-7 standards. |
S7210 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance with extremely tight dimensional tolerances on the bore, outside diameter, and width. The extra light preload minimizes system deflection, ensuring high rigidity and precise shaft positioning under load.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry provide excellent axial load carrying capacity in one direction, complemented by a substantial radial dynamic load rating of 9518 lbf.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the standard grease lubrication is suitable for high-speed operation up to a limiting speed of 34,000 rpm.
- Universal Matching and Sealed Design: As a Universal Matchable (SU) bearing, it can be mounted in tandem, back-to-back, or face-to-face arrangements with other bearings of the same designation to handle complex load conditions. The sealed construction protects against contamination and retains lubricant.
S7210 ACDGA/P4A Bearing Typical Application Areas
The S7210 ACDGA/P4A is specified for high-performance applications where precision, speed, and reliability are critical. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, high-frequency motor spindles.
- Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces, imaging device rotors.
- Aerospace Actuation Systems: Precision control mechanisms.
