7009 CD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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7009 CD/P4ATBTC Bearing Product Overview & Core Advantages
The 7009 CD/P4ATBTC is a high-precision angular contact ball bearing supplied as a triplex back-to-back matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing configuration is designed to handle combined radial and axial loads simultaneously. Its P4A tolerance class ensures ultra-precise running characteristics, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system stability are critical.
7009 CD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
- 7009: Basic designation indicating a 45 mm bore, 75 mm OD bearing.
- CD: Signifies a triplex back-to-back (TBT) matched set with universal face-to-face mounting.
- P4A: Denotes an ultra-high precision tolerance class with enhanced running accuracy requirements.
- TB: Indicates a phenolic (synthetic resin) cage, suitable for high-speed operation.
- T: Specifies a moderate preload (Class C) for optimal rigidity and reduced deflection.
- C: Refers to a 15° contact angle, optimized for high-speed performance with moderate axial load capacity.
7009 CD/P4ATBTC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The triplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding significant moment loads and combined loads. This configuration provides stable shaft positioning under complex loading conditions.
High-Speed Performance: The lightweight phenolic cage (TB) and optimized 15° contact angle enable a high limiting speed of 46,000 rpm. The phenolic material offers excellent strength-to-weight ratio and operates effectively with minimal lubrication.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring predictable performance and interchangeability in precision assemblies.
Preloaded Configuration: The moderate preload (Class C) eliminates internal clearance, increasing system stiffness and improving rotational accuracy while reducing noise and vibration.
7009 CD/P4ATBTC Bearing Typical Application Areas
This precision bearing set is specifically designed for high-performance applications including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Speed Machining Centers
- Precision Rotary Tables
- Industrial Robotics (arm joints and rotary actuators)
- Aerospace Positioning Systems
