S71920 ACD/P4ATBTB
Sealed Super Precision Angular Contact Ball Bearings
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S71920 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The S71920 ACD/P4ATBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex matched set features a back-to-back (TBT) arrangement, providing superior stiffness and moment load capacity. With its P4A tolerance class and phenolic cage, it delivers outstanding rotational accuracy and is optimized for high-speed operation. The sealed design with factory-applied grease ensures long-term, maintenance-free performance in various industrial environments.
S71920 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 719 | High-Precision Angular Contact Bearing Series | Superior running accuracy and dimensional stability |
| 20 | Bore Diameter: 100 mm | Standardized sizing for easy integration |
| ACD | 25° Contact Angle, High Precision | Optimal axial load capacity and rigidity |
| P4A | ABEC 7 / ISO P4 Tolerance Class | Exceptional dimensional and running accuracy |
| TBT | Triplex Back-to-Back Arrangement | Maximum moment stiffness and load distribution |
S71920 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The triplex back-to-back configuration creates an exceptionally rigid bearing system capable of withstanding heavy combined loads and significant moment forces, making it ideal for precision machinery requiring minimal deflection.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing delivers excellent performance under both radial and axial loads, achieving a dynamic load rating of 27,900 lbf and static load rating of 42,750 lbf.
High-Speed Capability: The phenolic resin cage provides excellent dimensional stability and low friction at high speeds, enabling operation up to 16,250 rpm while maintaining precision and reliability.
Pre-optimized Performance: As a factory-matched set with light preload (Class B), the bearings are precisely calibrated to deliver consistent performance without requiring additional adjustment during installation.
S71920 ACD/P4ATBTB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling applications
- Precision Gearboxes: Industrial transmission systems requiring high rigidity and accuracy
- Robotics: High-accuracy robot joints and precision positioning systems
- Medical Equipment: CT scanners, dental machining equipment, and laboratory instruments
- Aerospace Components: Guidance systems, actuator mechanisms, and flight control surfaces
