S7009 ACD/P4ATBTB
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7009 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The S7009 ACD/P4ATBTB is a super-precision angular contact ball bearing designed for the most demanding applications. This P4A tolerance class bearing is supplied as a triplex back-to-back (TBT) matched set, providing exceptional system rigidity and stability. Its primary advantage lies in its ability to handle combined radial and axial loads simultaneously with high accuracy, making it ideal for high-speed spindles and other precision machinery requiring maximum performance and reliability.
S7009 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
The model number S7009 ACD/P4ATBTB provides detailed technical specifications:
- S7: Series designation for high-precision angular contact bearings
- 009: Standard bore diameter code (45 mm)
- ACD: 25° contact angle design, optimized for high rigidity and axial load capacity
- P4A: Super-precision tolerance class (exceeding ABEC 7/ISO P4), ensuring minimal runout and vibration
- TBT: Triplex Back-to-Back matched arrangement of three bearings, providing superior moment stiffness
- B: Light preload (Class B), reducing deflection and optimizing bearing performance at operational speeds
S7009 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
The S7009 ACD/P4ATBTB's construction delivers distinct performance advantages:
- Exceptional Rigidity & Stability: The triplex back-to-back (TBT) arrangement of three bearings creates an extremely rigid bearing system, effectively resisting moment loads and minimizing shaft deflection under heavy cutting forces.
- High Load Capacity: The 25° contact angle and robust chrome steel construction provide excellent capacity for combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the grease lubrication and precision grinding contribute to a high limiting speed of 46,000 rpm.
- Sealed & Pre-lubricated: The sealed design with factory-applied grease protects against contamination and provides long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
S7009 ACD/P4ATBTB Bearing Typical Application Areas
This high-precision bearing set is engineered for advanced machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- High-Frequency Motors & Spindles: Motors for PCB drilling and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical navigation equipment.
