7009 ACD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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7009 ACD/P4AQBCB Bearing Product Overview & Core Advantages
The 7009 ACD/P4AQBCB is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing is pre-lubricated and arranged in a Quadruplex Back-to-Back (QBC) configuration, enabling it to handle significant combined loads (radial and axial) from both directions simultaneously. Its compact design and light preload (Class B) make it ideal for high-precision, high-stiffness systems where minimal deflection under load is critical.
7009 ACD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
- 7009: Basic designation indicating a 45 mm bore, 75 mm OD bearing.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Denotes a high-precision tolerance class with running accuracy requirements.
- QBC: Specifies a Quadruplex Back-to-Back matched set of 4 bearings.
- B: Indicates a Light Preload (Class B) for optimal rigidity and running accuracy.
7009 ACD/P4AQBCB Bearing Structural Features & Performance Benefits
Unmatched Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an extremely rigid bearing system, capable of withstanding heavy combined loads and moments. This configuration provides superior stability for spindles and shafts.
High-Speed Capability: The phenolic cage and optimized internal geometry contribute to lower friction and allow for a high limiting speed of 41,000 rpm, making it suitable for high-speed applications.
Precision Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing ensures high running accuracy, low noise, and minimal vibration, which is essential for precision machinery.
Ready-to-Install: The bearing set is pre-lubricated and comes as a matched set, ensuring consistent performance and simplifying the installation process.
7009 ACD/P4AQBCB Bearing Typical Application Areas
This high-precision, high-rigidity bearing is ideally suited for:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Tables
- High-Frequency Spindles
- Industrial Robotics (Articulated arm joints)
- Aerospace Actuation Systems
