S71913 CB/P4AQBCB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71913 CB/P4AQBCB
Basic Information
System of measurement
Metric
Weight
0.87 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
32
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6322 lbf
Radial static load rating
8438 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Grease
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S71913 CB/P4AQBCB Bearing Product Overview & Core Advantages
The S71913 CB/P4AQBCB is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This bearing is supplied as a Quadruplex Back-to-Back (QBC) matched set, providing superior stiffness and the ability to withstand significant combined loads (radial and axial loads from both directions simultaneously). Manufactured to a P4A tolerance class, it ensures high running accuracy and is pre-lubricated with grease for long-term, maintenance-free operation, making it an ideal choice for high-speed and high-precision machinery.
S71913 CB/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1913 | Bore size code (65 mm) and series dimension. |
| CB | Specifies a 15° contact angle and universal matching designation (though this set is pre-arranged). |
| P4A | Indicates a high-precision tolerance class with enhanced running accuracy requirements. |
| QBC | Denotes the bearing is part of a Quadruplex Back-to-Back matched set of 4 bearings. |
S71913 CB/P4AQBCB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates a highly rigid bearing system, capable of supporting heavy combined loads and resisting moment loads effectively. The 15° contact angle is optimized for sustaining substantial axial loads.
- High-Speed Performance: The lightweight and robust phenolic resin cage ensures stable operation and low friction at high rotational speeds, contributing to the bearing's high limiting speed of 36,000 rpm.
- Precision & Longevity: Manufactured to P4A dimensional and running accuracy standards from high-grade chrome steel, this bearing guarantees smooth, precise, and quiet operation with minimal runout and vibration.
- Maintenance-Free Operation: The bearing is sealed and pre-lubricated with grease, protecting it from contamination and providing reliable performance throughout its service life without the need for re-lubrication within its specified temperature range of -30°C to 110°C.
S71913 CB/P4AQBCB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme accuracy and minimal deflection are required.
- High-Frequency Motors and Spindles: Used in PCB drilling and other high-RPM applications.
- Industrial Pumps and Compressors: For handling significant axial and radial forces.
- Advanced Robotics and Automation: In high-accuracy rotary joints and actuators.
