S7009 ACD/P4ADT
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7009 ACD/P4ADT Bearing Product Overview & Core Advantages
The S7009 ACD/P4ADT is a precision duplex tandem angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched bearing set features a P4A tolerance class and is preloaded, enabling it to handle combined radial and axial loads simultaneously with minimal deflection. Its compact design and high rigidity make it ideal for high-speed, high-precision machinery where positional accuracy is critical.
S7009 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| S7009 | Basic bearing series and size designation |
| ACD | Angular Contact, Duplex arrangement (Tandem configuration in this set) |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DT | Duplex Tandem arrangement (two bearings matched for axial load capacity in one direction) |
S7009 ACD/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement provides exceptional stiffness, allowing the bearing set to withstand heavy combined loads while maintaining precision. The 25° contact angle optimizes axial load carrying capacity.
Precision Performance: Manufactured to P4A tolerance class with precise dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for high-precision applications.
High-Speed Capability: The phenolic resin cage and optimized internal geometry enable stable operation at limiting speeds up to 46,000 rpm, making it suitable for high-speed spindle applications.
Sealed & Lubricated: Factory-sealed design with grease lubrication provides contamination protection and long-term performance across a temperature range of -30°C to 110°C.
S7009 ACD/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instrumentation - Measuring equipment and optical devices requiring minimal deflection
- High-Speed Motors - Spindle motors and high-RPM industrial drives
- Aerospace Components - Guidance systems and precision actuators
- Medical Equipment - Dental handpieces and surgical tool drives
