7204 CD/P4ADFB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7204 CD/P4ADFB Bearing Product Overview & Core Advantages
The 7204 CD/P4ADFB is a precision angular contact ball bearing supplied as a matched duplex pair in a Face-to-Face (DF) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional running accuracy and high system rigidity. Its core advantages include the ability to support combined loads (radial and axial) simultaneously, superior high-speed performance enabled by its phenolic cage, and high operational stability due to the preloaded DF configuration. This makes it an ideal component for high-precision, high-reliability machinery.
7204 CD/P4ADFB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7204 | Basic bearing series, indicating a 20 mm bore, 47 mm OD, and 28 mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings mounted together). |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
| DF | Specifies the Face-to-Face matched arrangement, providing high moment stiffness. |
| B | Indicates a Light preload / Class B, which reduces deflection and improves positional accuracy. |
7204 CD/P4ADFB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex Face-to-Face (DF) arrangement and light preload work in concert to create an exceptionally rigid bearing system. This configuration significantly increases resistance to moment loads and minimizes axial and radial runout, ensuring precise shaft positioning and smooth operation under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage is instrumental in achieving the high limiting speed of 100,500 rpm. This material offers excellent strength-to-weight ratio and operates effectively with minimal friction, making it ideal for high-speed spindles.
- Precision & Load Capacity: Manufactured to P4A tolerance standards, this bearing guarantees minimal dimensional variation and superior running accuracy. The 15° contact angle is optimized to handle significant combined radial and axial loads, with a dynamic load rating of 4388 lbf and a static load rating of 2610 lbf.
- Open & Lubricated Design: The open seal type allows for optimal lubrication flow and heat dissipation. The bearings are supplied lubricated, ready for installation and initial operation within a broad temperature range of -30°C to 110°C.
7204 CD/P4ADFB Bearing Typical Application Areas
The 7204 CD/P4ADFB is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy joints and arm linkages.
- Medical Equipment: Dental handpieces and laboratory automation systems.
- Test & Measurement Equipment: Coordinate measuring machines (CMM) and optical scanners.
