7209 ACD/P4ADGA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7209 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7209 ACD/P4ADGA is a precision double-row angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This universal matchable bearing is designed to simultaneously handle combined loads, including significant radial loads and bidirectional axial loads. Its compact design, featuring two rows of balls and a 25° contact angle, provides high rigidity and stable rotational characteristics. Manufactured to P4A tolerance class, it ensures superior running accuracy, making it an ideal choice for high-speed and high-precision machinery.
7209 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- 7209: Basic series number (45mm bore, 85mm OD)
- A: 25° contact angle
- CD: Universal Matchable (SU) arrangement, supplied as a pair (2 bearings)
- P4A: High precision tolerance class (equivalent to ABEC 7)
- DGA: Phenolic (resin) cage, open design, lubricated
7209 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double-row design with a 25° contact angle provides superior stiffness and enables the bearing to support substantial combined radial and axial loads in both directions. The universal matching feature allows for flexible mounting arrangements without requiring specific bearing selection.
Precision & Speed Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy. The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 41,000 rpm, making it suitable for demanding high-speed applications.
Material & Construction: Constructed from chrome steel for both rings and balls, ensuring high durability and wear resistance. The bearing comes pre-lubricated and operates effectively within a temperature range of -30°C to 110°C.
7209 ACD/P4ADGA Bearing Typical Application Areas
The 7209 ACD/P4ADGA is specifically designed for precision machinery requiring high speed, rigidity, and accuracy. Typical applications include:
- Machine tool spindles
- High-frequency motors
- Precision grinding equipment
- Industrial pumps and compressors
- Robotics and automation systems
- Medical and laboratory equipment
