7009 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7009 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7009 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. As a single bearing from a Universal Matchable (SU) set of three, it offers outstanding performance in preloaded configurations. Its key advantages include the ability to handle combined loads (radial and axial) efficiently due to its 25° contact angle, superior running accuracy from its P4A tolerance class, and high-speed capability supported by its lightweight phenolic cage. This bearing is pre-lubricated and is an ideal choice for machine tool spindles and other high-precision, high-rigidity systems.
Model Code Breakdown
- 7009: Basic series number, indicating a metric bearing with a 45mm bore and 75mm outside diameter.
- AC: Angular Contact design, optimized for combined loads.
- D: Specific internal design and contact angle (25°).
- GB: Indicates a Light preload (Class B).
- P4A: Denotes a super-precision tolerance class with enhanced dimensional and running accuracy.
7009 ACDGB/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The bearing's angular contact design and 25° contact angle provide high rigidity and enable it to support significant combined radial and axial loads. The light preload (Class B) eliminates internal clearance, ensuring precise shaft positioning and enhanced system stiffness.
High-Speed Performance: The use of a lightweight, durable phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 41,000 rpm. This makes it suitable for high-speed spindle applications.
Precision and Longevity: Manufactured to a P4A super-precision tolerance, this bearing guarantees exceptional running accuracy and low noise/vibration. The chrome steel rings and balls, along with the pre-applied lubrication, ensure reliable operation and a long service life within a temperature range of -30°C to 110°C.
7009 ACDGB/P4A Bearing Typical Application Areas
The 7009 ACDGB/P4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
