S7202 ACD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S7202 ACD/P4ADBB Bearing Product Overview & Core Advantages
The S7202 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and running accuracy. This matched set features a back-to-back (DB) arrangement, providing superior stability and the ability to withstand combined loads (significant radial and bidirectional axial loads) simultaneously. Manufactured to P4A tolerance class, it offers extremely tight dimensional and running accuracy, making it an ideal choice for high-precision, high-rigidity spindles and other critical machinery where minimal deflection and maximum performance are required.
S7202 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7 | Bearing Series | Indicates a specific design series for high-precision angular contact bearings. |
| 202 | Bore Size Code | Denotes a 15 mm bore diameter. |
| AC | Angular Contact | The fundamental bearing type, designed to carry combined loads. |
| D | Duplex / Matched Set | Specifies that this is a set of two bearings supplied as a matched pair. |
| P4A | Tolerance Class | Signifies a very high precision grade with extremely tight tolerances on dimensions and running accuracy. |
| DB | Back-to-Back Arrangement | Indicates the two bearings are matched to be mounted back-to-back, providing high moment rigidity. |
| B | Preload | Denotes a Light preload (Class B), which minimizes deflection and ensures smooth, precise operation from startup. |
S7202 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread between load centers. This configuration provides exceptional resistance to moment loads and shaft deflection, ensuring high system rigidity and rotational stability under combined loads.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 2632 lbf, this bearing is engineered to handle significant radial and bidirectional axial loads simultaneously, a common requirement in precision machinery.
Optimized for High-Speed Operation: The phenolic cage is lightweight and robust, offering excellent performance at the high limiting speed of 115,000 rpm. This cage material reduces centrifugal forces and friction, contributing to lower operating temperatures.
Precision & Longevity: Manufactured to ABEC 7 / P4A precision class from chrome steel, the bearing guarantees minimal runout and vibration. The standard grease lubrication and sealed design protect against contamination, supporting reliable, long-term performance in its specified temperature range of -30°C to 110°C.
S7202 ACD/P4ADBB Bearing Typical Application Areas
The S7202 ACD/P4ADBB is specifically engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Frequency Motors
- Dental and Medical Handpiece Drives
- Advanced Robotics and Automation (e.g., high-precision rotary joints)
