S71911 CE/P4ADT
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71911 CE/P4ADT Bearing Product Overview & Core Advantages
The S71911 CE/P4ADT is a precision duplex tandem angular contact ball bearing designed for high-performance applications requiring exceptional rigidity and rotational accuracy. This matched pair bearing set is preloaded and manufactured to P4A tolerance class, ensuring minimal runout and superior dimensional stability. Its primary advantage lies in its ability to handle combined loads (radial and axial) efficiently in a single direction with high rigidity, making it ideal for high-speed spindles and other precision machinery where uncompromising accuracy is critical.
S71911 CE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
- S: Denotes a bearing with a 15° contact angle.
- 7: Indicates an Angular Contact Ball Bearing.
- 1911: Specifies the size series; 19 for the width series and 11 for the bore diameter code (55 mm).
- CE: Signifies that the bearing is preloaded and the two bearings in the set are arranged in a Duplex Tandem (DT) configuration to maximize axial load capacity in one direction.
- P4A: Represents the tolerance class, indicating very high precision for both dimensional and running accuracy.
- DT: Confirms the Duplex Tandem matched arrangement.
S71911 CE/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex tandem arrangement and preload create an exceptionally rigid bearing system, capable of supporting high axial loads in one direction and significant radial loads simultaneously. This configuration minimizes axial deflection under load, ensuring precise shaft positioning.
Precision and High-Speed Operation: Manufactured to P4A super-precision standards, this bearing guarantees smooth, quiet, and vibration-free operation. The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 34,000 rpm. The optimized internal geometry with a 15° contact angle provides an excellent balance between axial and radial load capacity for high-speed applications.
Sealed and Lubricated for Life: As a sealed bearing, it is protected from contamination and comes pre-lubricated with grease, offering a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S71911 CE/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Motors
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Drives
