S71911 CD/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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S71911 CD/P4ADGA Bearing Product Overview & Core Advantages
The S71911 CD/P4ADGA is a precision angular contact ball bearing designed for high-performance applications. Engineered to the P4A tolerance class, it delivers exceptional dimensional accuracy and running precision. Its key advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and axial loads in one direction. The Extra light (Class A) preload ensures high system rigidity and minimizes deflection under load, making it ideal for spindles and other high-precision, high-speed machinery where rotational accuracy is paramount.
S71911 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision angular contact ball bearings. |
| 1911 | Specifies the bearing size: 55mm bore, 80mm outside diameter, 26mm width. |
| CD | Denotes a Universal Matchable (SU) 15° contact angle design. Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to handle bidirectional axial loads. |
| P4A | Specifies the tolerance class, corresponding to ABEC 7 precision, with enhanced width and runout tolerances for superior performance. |
| DGA | Indicates the bearing is sealed and pre-lubricated with grease. |
S71911 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerances from Chrome Steel, this bearing ensures minimal runout and vibration. The 15° contact angle and Class A preload provide high axial and radial stiffness, critical for maintaining accuracy under combined loads.
Optimized High-Speed Performance: The lightweight Phenolic cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 34,000 rpm. This design is ideal for high-speed spindle applications.
Sealed and Lubricated for Long Life: As a sealed unit pre-lubricated with grease, the S71911 CD/P4ADGA is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S71911 CD/P4ADGA Bearing Typical Application Areas
This precision bearing is engineered for demanding applications where high speed, rigidity, and accuracy are non-negotiable. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and high-accuracy rotary tables.
- High-Frequency Motors and Spindles: Applications requiring exceptional rotational accuracy.
