S71920 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71920 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71920 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stability and stiffness, making it ideal for high-speed spindles and precision machinery. Its P4A tolerance class ensures ultra-precise running accuracy, while the phenolic cage and sealed design contribute to reliable, long-term performance under combined radial and axial loads.
S71920 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series
- 1920: Standard size designation (100mm bore, 140mm OD, 40mm width)
- CD: Duplex arrangement with back-to-back mounting and extra light preload (Class A)
- P4A: Super precision tolerance class with enhanced running accuracy requirements
- DB: Duplex Back-to-Back matched bearing set
- A: 15° contact angle optimized for combined loading applications
S71920 CD/P4ADBA Bearing Structural Features & Performance Benefits
This bearing's advanced construction delivers significant performance advantages:
- High Rigidity & Stability: The duplex back-to-back arrangement creates a rigid bearing system that effectively resists moment loads and maintains precise shaft positioning under demanding operating conditions.
- Superior Load Capacity: With a radial dynamic load rating of 21,938 lbf and radial static load rating of 29,700 lbf, this bearing handles significant combined radial and axial loads simultaneously, thanks to its optimized 15° contact angle.
- High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio and smooth operation at limiting speeds up to 16,250 rpm, while the sealed design retains lubrication effectively.
- Precision Engineering: Manufactured to P4A super precision standards with tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring minimal runout and vibration for critical applications.
S71920 CD/P4ADBA Bearing Typical Application Areas
The S71920 CD/P4ADBA excels in applications requiring high precision, speed, and rigidity:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Robotics: Industrial robot arms and precision positioning systems
- Medical Equipment: High-speed dental handpieces and medical imaging devices
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- High-Frequency Spindles: PCB drilling machines and precision engraving equipment
